"Solved" Day 4

Literally couldn't be assed to write out the full list of cases in Odin
syntax when it's just objectively more cumbersome than Python syntax

odin/day02/day02.odin

@@ -37,13 +37,31 @@ determine_score :: proc(friendly: Move, enemy: Move) -> int {
     return result + int(friendly)
 }
 
-determine_score_alt :: proc(friendly: Move, outcome: Move) -> int {
-    // X = lose round
-    // Y = draw round
-    // Z = win round
-    // 3 defeats 2, 2 defeats 1, 1 defeats 3
-    // If w := enemy input and v := friendly input, then w = (v - 1) % 2 is a defeat
-    return 0
+/// Scoring for Part 2 of the puzzle
+determine_score_alt :: proc(outcome: Move, enemy: Move) -> int {
+    // Redefine the outcomes so that
+    // draw = 0, win = 1, lose = 2
+    outcome_ : int;
+    switch outcome {
+        // X = lose
+        case .ROCK:
+            outcome_ = 2
+        // Y = draw
+        case .PAPER:
+            outcome_ = 0
+        // Z = win
+        case .SCISSORS:
+            outcome_ = 1
+    }
+    // Convert enemy from range [1, 3] to range [0, 2]
+    enemy_ := int(enemy) - 1
+    // Assert that (friendly - enemy = outcome) % 3 (see scratch.py)
+    // Thus, (friendly = outcome + enemy) % 3
+    friendly_ := (outcome_ + enemy_) % 3
+    // Add 1 back in because we subtracted it before (going from [0, 2] to [1, 3])
+    friendly_ = friendly_ + 1
+    // Return score as before
+    return determine_score(cast(Move)friendly_, enemy)
 }
 
 main :: proc () {
@@ -56,7 +74,7 @@ main :: proc () {
     fh, errno := os.open(os.args[1])
     if errno != os.ERROR_NONE {
         fmt.printf("Cannot open %s: %s\n", os.args[1], os.get_last_error_string())
-        os.exit(int(errno))
+        os.exit(-1)
     }
     defer os.close(fh)
 
@@ -64,6 +82,7 @@ main :: proc () {
     defer delete(buffer);
 
     num_read, error := os.read(fh, buffer)
+    score : int = 0;
     total_score : int = 0;
     friendly : Move
     enemy : Move
@@ -73,8 +92,9 @@ main :: proc () {
         chr = buffer[0]
         switch chr {
             case '\n':
-            fmt.printf("Score for this line: %d\n", determine_score(friendly, enemy))
-            total_score += determine_score(friendly, enemy)
+            score = determine_score_alt(friendly, enemy)
+            fmt.printf("Score for this line: %d\n", score)
+            total_score += score
             case 'A':
                 enemy = .ROCK
             case 'B':
@@ -92,7 +112,7 @@ main :: proc () {
         }
     }
     if chr != '\n' {
-        total_score += determine_score(friendly, enemy)
+        total_score += determine_score_alt(friendly, enemy)
     }
     /// Handle potential errors
     if error != os.ERROR_NONE {

odin/day02/scratch.py

@@ -0,0 +1,51 @@
+rock = 0
+paper = 1
+scissors = 2
+
+print("Friendly first, then enemy")
+
+result = (rock - paper) % 3
+print(f"{rock} - {paper} % 3 = {result}")
+
+result = (paper - scissors) % 3
+print(f"{paper} - {scissors} % 3 = {result}")
+
+result = (scissors - rock) % 3
+print(f"{scissors} - {rock} % 3 = {result}")
+
+print("lose = 2")
+lose = 2
+
+result = (paper - rock) % 3
+print(f"{paper} - {rock} % 3 = {result}")
+
+result = (scissors - paper) % 3
+print(f"{scissors} - {paper} % 3 = {result}")
+
+result = (rock - scissors) % 3
+print(f"{rock} - {scissors} % 3 = {result}")
+
+print("win = 1")
+win = 1
+
+result = (paper - paper) % 3
+print(f"{paper} - {paper} % 3 = {result}")
+
+result = (scissors - scissors) % 3
+print(f"{scissors} - {scissors} % 3 = {result}")
+
+result = (rock - rock) % 3
+print(f"{rock} - {rock} % 3 = {result}")
+
+print("draw = 0")
+draw = 0
+
+print("(friendly - outcome = enemy) % 3")
+outcome = (rock - win) % 3
+print(f"{outcome} = {scissors}")
+
+outcome = (paper - win) % 3
+print(f"{outcome} = {rock}")
+
+outcome = (scissors - win) % 3
+print(f"{outcome} = {paper}")

odin/day03/day03.odin

@@ -0,0 +1,429 @@
+package day03
+
+import "core:fmt";
+
+// Lowercase item types a through z have priorities 1 through 26.
+// Uppercase item types A through Z have priorities 27 through 52.
+
+BOUND_a := int('a')
+BOUND_z := int('z')
+BOUND_A := int('A')
+BOUND_Z := int('Z')
+
+priority :: proc(item: rune) -> int {
+	item_ := int(item)
+	n : int;
+	if BOUND_a <= item_ && item_ <= BOUND_z {
+		// Map to range [25, 0]
+		n = BOUND_z - item_
+		// Reverse range to [0, 25]
+		m := 25 - n
+		// Map to range [1, 26]
+		return m + 1
+	} else if BOUND_A <= item_ && item_ <= BOUND_Z {
+		// Map to range [25, 0]
+		n = BOUND_Z - item_
+		// Reverse range to [0, 25]
+		m := 25 - n
+		// Map to range [27, 52]
+		return m + 27
+	} else {
+		return -1
+	}
+}
+
+prio_to_rune :: proc(prio: int) -> rune {
+	if 1 <= prio && prio <= 26 {
+		return rune(BOUND_a + prio)
+	}
+	if 27 <= prio && prio <= 52 {
+		return rune(BOUND_A + prio)
+	}
+	return 0
+}
+
+sum_rucksack :: proc(sack: string) -> int {
+	counter := make([]int, 52)
+	defer delete(counter)
+	for idx in 0..<52 {
+		counter[idx] = 0
+	}
+	total := 0
+	midpoint := len(sack) / 2
+	for chr, idx in sack {
+		prio := priority(chr)
+		if prio < 0 {
+			return -1 // TODO handle error better
+		}
+		index := prio - 1
+		if idx < midpoint {
+			counter[index] += 1
+		} else {
+			if counter[index] > 0 {
+				fmt.printf("Adding %c (%d)\n", chr, prio)
+				counter[index] = -1
+				total += prio
+			}
+		}
+	}
+	return total
+}
+
+find_common_item :: proc(sacks: []string) -> int {
+	size := 52
+	counter := make([]int, size) // Dynamic array initialized to all 0
+	defer delete(counter) // Clean up memory when it goes out of scope
+
+	// Compute the max value for a counter
+	max_counter := 0
+	idx : u32 = 0
+	for _ in 0..<len(sacks) {
+		max_counter = max_counter & (1 << idx)
+		idx += 1
+	}
+
+	// Check every item in every rucksack
+	for sack, offset_ in sacks {
+		offset := u32(offset_)
+		for chr, _ in sack {
+			prio := priority(chr) - 1
+			counter[prio] = counter[prio] & (1 << offset)
+			// If we hit the max value, we can just quit without checking anything else - this is because per the problem there should only be one item that appears in all three rucksacks
+			if counter[prio] == max_counter {
+				return prio + 1
+			}
+		}
+	}
+	return 0
+}
+
+main :: proc() {
+	// input := [6]string{
+	// 	"vJrwpWtwJgWrhcsFMMfFFhFp",
+	// 	"jqHRNqRjqzjGDLGLrsFMfFZSrLrFZsSL",
+	// 	"PmmdzqPrVvPwwTWBwg",
+	// 	"wMqvLMZHhHMvwLHjbvcjnnSBnvTQFn",
+	// 	"ttgJtRGJQctTZtZT",
+	// 	"CrZsJsPPZsGzwwsLwLmpwMDw",
+	// }
+	input := []string{
+		"lvcNpRHDCnTLCJlL",
+		"RFZggsMrjTFGCJmdmd",
+		"srsBZgBqwBqRZbzqtHpzzDNtHDqV",
+		"CCTPpCvlpzzZQQQflrzbQDttTJcgcggJcHtcddtdhT",
+		"nMLBRnGsFFLznRFRLMMNBnNLDRDdhScJccctdSccJJgDDHhH",
+		"GVBGVBsLjsrrvfzpjpfQ",
+		"dzVRSPVVBVDSPzDBQVSQFFlrclMplpMJMtPJlJvHZCMt",
+		"TjmGmbhjTnTmwhmrvvrHcZvCHZMl",
+		"fnLwwqfwfqjghHwGThwfTGGBFVDFFsszSRVzRBsdBDgFsV",
+		"CCWFCcdDWwcWFpSvggnzRRQszngJwT",
+		"mGtqqLrqfmmLNtNrgTjgJzNQlvJTvznJ",
+		"tnhVbhMLLZZrnWHPSHDBWbWBFd",
+		"nQhvgnCQjSSSTTSMCsLDsfPfDlsPJMWLzL",
+		"qrqBFFBbrVRLszLfsqdqPW",
+		"bNFFRbBcFZNrZRRRbprNpFrHSwznTnvSwgHvzCSSSjnCQwgz",
+		"tnnZZVmwmqtvVdZqnddQQHHTHQLsFTnsPrrgrQ",
+		"MzMflMGpzGzPGPgjLgHrGj",
+		"zPfhMJDDMJfzlhcRJvVwcVtwVcmcbqqtbv",
+		"GVzrBVcPVfGrzVVBcQJlGGRCZSSRtSdRnGLJ",
+		"wbjvHWbLvhFppjZdtwZRNddtJwlR",
+		"pvMmbpFFbqqqvWHMFvzrLDMMrMTTrVTPzVzc",
+		"qPmgpmwpwqWWPHdjdTNStzNLMztSWtMNtz",
+		"lVFfJrFJbbcsvcRVRZzQCzQNSZTZ",
+		"DGbvFSDGbDjnqgjwmGdq",
+		"DMnpnpwwnpmRRmcRBDnDwpbRQHssHqhHCHHSsQddHZQQcqqs",
+		"JlZjjlJgNSddfsgQdf",
+		"GvrWvzNjvPVLDpbPZwBP",
+		"drQDzHsHrdZWqDSSPwmmJDDbvbSJ",
+		"hphBhCMFlBtBtGTJMJsscPwTjMJv",
+		"tlBCGFgVFNpGClFFVGGtFBZrdZQznfdQQrRWVRQdRsVf",
+		"NjdCLdjzzlNdjwBBtZqpqPJQbN",
+		"CsDWcHcGHtcBbJPpbP",
+		"mGHSssSgSsHFSgGrSgmlLzCdldllrCVCLdnfnT",
+		"rDLLzRmbcLJRtRSvSBdZtSTp",
+		"MFswshwgsCsjghgFBsGssjlZpfpvdSHfTdCZTSpHtfddTH",
+		"llwlwGjMPMQQnBMswsFgglPVcWcDcbWqLWbbLJVDzrqnVr",
+		"pqmmcSTLfSSSMFlf",
+		"rHWtPWnHtlrlDntzWwtBFdzCFMRCfjRQFfgMRMjC",
+		"PWWHDVZPDDJVlWHncGGbqqTVvVmpGTmm",
+		"wLBtWhGWJBdMmZMs",
+		"jgvNCFvvGppGnmNJ",
+		"DDRQTgcvjTPFqGHhRVhLRSVL",
+		"tPPwLpBpDpgLSPvgQCvsLPjdjNZrJZsdZjsrsnZNjbZc",
+		"lMWzWMBhmMhRGfVRffHmMjJcJjrNNZnjJcWjNqJnZJ",
+		"mFMzhTmBGfHTwgPgtptFpPgP",
+		"qCcqJQHslgtsQsCZmPWNSRNZTPBBCN",
+		"nnLpjjnvwwvDnrGwFvbFjwPgPWRTPrrPShNhmmNSRRPN",
+		"bnwdDLjnzGgvFqdJQcqVfQVqHt",
+		"DfCzDCCTDLDBCsdjzwdrHjbRgjGH",
+		"MSStMScccJtPptJNJZtJJSrFdwPGjFFHHwsggrwdwRdP",
+		"nStlpVlhhNSshZlcNZnMcctpBChWBQLqCWqmqvmBCBmQBqmL",
+		"RfLHNvfLfLZQBtRZsBfffjVqGvqpGSmJpgrJpjGjrp",
+		"FDbPCMzbTTDDPmzrVzqppJBrBj",
+		"DPcWPWDhlbCcWBsQZZfHtdwf",
+		"fbHfPfHHfPZWgZfSGpqNBqdBBjpjdPBJqv",
+		"rnVNCwwrhhDrmmvcmjdDqcmB",
+		"hFRrslFRNhFzVthllRCRCCwnQtSGfQgZZbbSWQLSSTZWbQTt",
+		"nmVqTFCmTVbnvVCnqwFrffjhZLffhNrNJF",
+		"StBHWDgMBpHMBHDzLjffjWwZJNNfNZjL",
+		"wBBcDcgzdVbbQcnQlq",
+		"MfGCtqGDhjDqHhrjGCcJZZBwHRcspZsBsHRc",
+		"PFFpLFSpzVdSTPgnzzdPPZBRcZBwBJRcWJBmJW",
+		"vdTTzVpNVpfCChMGqMvr",
+		"VtZzBzhtlrhznFlBfgrfZgFrPjGRMGjRTmSjRjRTHjfRHmRv",
+		"DQpnsbJCsNNnpNNJsDQdCDcRmHPGTHTHRSmRmHjvjHSpSS",
+		"cQbnQdNLdJJQJJJDJWnFwzgwBthrgZBwBgFLZV",
+		"VhRRgmhpFjFFBDVPGPWQPzvvMMWfjf",
+		"qcnbnCbfLqJrCnrcdbbLrGSlzWsQvsWWzvWGdMWGQl",
+		"bnfbwrcwCrHqnHcZhFBTBVRDFmpBHB",
+		"lrtqltJJJqSTWJqVHRnsRhphdbfbzBdhsRsd",
+		"vSZCgZMMLSNvCQLPLDPNgZgnznzBfsGGnQnQGdnsfhsfzb",
+		"CMFLgmPgFFNMFDDCgLLcrWrjTTjtmSJqlWTTwWSr",
+		"LdjljBdZMFdZFLLLgPvWzQRzCsCmCVssmFSW",
+		"TJttwDhnnTlWsQzSQQDvWm",
+		"HtcnfctJwtwrHhrwhfHhJpjNLMZBMgZLrBlbbLNPNj",
+		"qqhNchPdpqTTNqpDmmvvGzVfzfmvdH",
+		"cwccjsFwFjnwGwQDfVVVVv",
+		"FbWjcRsLLFngBrjpbJqCJZTbJZNClq",
+		"lhznMTSzSnjhQGtVPQBdGB",
+		"msfNDDJLWslJgfNgCrmLdtGQFVvdGQPZVttBFP",
+		"RCrJJJDrJRsfgmbsrNsrlDMTSMHcjqwzScjMqqTjbbSc",
+		"nNgsvNWDRvgnRNVCFddTNZTNZQCTFZ",
+		"lffHJfHSPmSfvLlbLmpZrCTFTtrTQHqtTrCCrq",
+		"cpzblplpbvMzWnsDDB",
+		"CgtvQvJvMtWttvwftCdWvDQrfsFcrqnlcnqZZFRcRqsnhF",
+		"HzLzVBNLjHqnhzFlWFlr",
+		"NmBjLbVVbmbTLpTjBNVLHNdCtTSWQvCgdwSwJtWQwdSD",
+		"lncHcnlccVSLNSQNslncLcrZJCrgPfJZDrggJCCvZPHC",
+		"jRqqRmmqFwRFppfPPppPBfpWBvZf",
+		"wmMqjtTdjFwGGdtNhQbVfhntcNLVbL",
+		"HFBgMjpbpddMpbHdgHLLRNwhwFLDtNSRDLLD",
+		"zsCnfqZflrlnhhrtwNgggNNL",
+		"CGqnQzlqlWWMWgVBGg",
+		"pQnvzjztpzpCmtzzjzpnBHrJNGlqggMMqgqlNWgfNNqNCP",
+		"sVTSwddRRDVShwRwRTWgPNqMGQMGNqMWslsg",
+		"hDSTQhcQcHrtcBmZHv",
+		"QRmQfvQpWpswfZWWvNbhlMglgFbZDldlbL",
+		"rzHqtcnqqVjqjGcHdLdFdCFdCbLDnMCh",
+		"DGcGGSPDpWTsSfpv",
+		"llfMHTmvHlfZlFZRzgQzsFBLtLzFGF",
+		"wrWNJrdJhRmhGmNh",
+		"DWrrJjwPjCdPDwdmwnrTZnZZcqZfnqbvZfHvql",
+		"mPmVJJmNZJmlVBPPrZpWcFWbGWbjgqNbdqjSjg",
+		"nMhzwRhwvhMDMgWHRdGHgccggd",
+		"sMvnhQshMwwvdvMMCwBtlZtplZpTmPBVZVlC",
+		"ltlRzpncRglplzhFwFwzZZMWLWZBqnDVZLDVZQQQ",
+		"SJcdvJscNSsGcSGCSJmsTQDTVZQTLTQQWCTTMQCW",
+		"sPdJmcvsJvGJmdJmfpwftfrlztrRlPfP",
+		"LdPrWcMCWCfPdMJgdFsbRRHsRSHRHHcFpH",
+		"hVVTQmQTnRFLFsmzps",
+		"qthVVwZqlQLQhNttDDDWrffDJJJDrgNP",
+		"BTjTNjtlPrBjjrljbnMFfhVWFFhlMWMfHdll",
+		"mzcgZvDggDDCJCZLvsLJLcmVqWVSVqFLfdHHMWVWWWffnF",
+		"cmmcmzQDZQJmZCnDRgQCTTwjpTtwRjrbNjpPpwrj",
+		"rMbchQphhCSbGnzSbl",
+		"qFtgvTTqFFFFJGzWJG",
+		"NZjGqGBNjNHQrhpPNHQr",
+		"LnLmbtTtTwtLcVfFFLtPrfPrfqqqsqhSvrhrhh",
+		"BzJWzZRZJzJvlZJCZgZZpJHCqQDhNQPDqDDrjNsjPPNrhSCN",
+		"lpJWZzJpgHWdWMgHlJMZzgpJLGVLGGvwVwtmcGbvGMGVvncn",
+		"WdBgdqRgWqHmNNwsGgcQ",
+		"ptPVbPbSbMJrmsVzRzhwmcGQ",
+		"SSbvrJbJtCDZfTqdRfCdBZ",
+		"WDNNWvPpvNJRRbGLsGMnnbmG",
+		"qgFdBwgVdjwdtjjdBgMgGmLQsnZrnZssGswsmLrw",
+		"FqTCTtqjdjVqgCqSMJMTvPThTJMNDh",
+		"brSSSpZjVVWdfVrHPhRBggNNGwHr",
+		"fDlLzFCLMvnMMJLNHNCBQwNhRgwRPP",
+		"MJqMmfzDvFtLDtmsVsZZTsSScWcsbq",
+		"CSZlllhSdnDrrDdJjqjzbSGzGvwbfHMb",
+		"gTNvVNLQtsFpQHqfwfBfVMfHzf",
+		"QgNmWTtmTcmmdmrZRvnlPl",
+		"SmzfvfjvjbjLNJjD",
+		"cFhWMhGHTPhccMQQGBTFGwbVVwdbddJDvVJLvDDHvd",
+		"GFMBGcWTWhcGrhFZTTchQsSfgtmnnRvnmnnRgRCrRS",
+		"ZTQHVZsZSQpQQGBMGqfBRbRB",
+		"CwtLDtNFcPnllwnqvMgbvGVfVfBG",
+		"VClLWWFPPhlhctsTrrSpWpmszjZj",
+		"HChzPltNnnHtnpqSpHpFpSfSvS",
+		"mJmQssZJLdTQLcbjlGLGfSgMbqwwSFSMSFMMqMwS",
+		"JdBLlGTjLjjjjdmmBPnRzCBRNPhPtPWPtr",
+		"FPLHMHqqPMgFLLggsMghTJhwtDSSJDltJvtwdvST",
+		"WQfmjQZsjfZNQCrZCNZQQWQBCSClvdwTSClwSwlTJvtwJdbT",
+		"BpmzrWcpBrfmpsGPGFqPRgzqVPLM",
+		"bHjccpHwGHJTfPlffPwr",
+		"VtChMZVhhStZdfTCfJvcPRCTJn",
+		"sLNLZcdNZZqZqqVqSNWtjQDGHssHGHgQHDBgmsDg",
+		"CdWgCpddwgClFlmmVTBbRtRtbntBVVds",
+		"vcJGhPLPhJvChLhMLfccrvfvsVVbsGBTTBnVbRzBVstsGnbz",
+		"vJJHhjcCLPPjQPHLrSZmpgmqwlWZZgZZQm",
+		"VpTFCFtrjCdJdjHVFnSjszSllDjsDzgvzl",
+		"fhmhZBMtfZfGBNfNcmsbZnzSlRsRggslsbnv",
+		"qPLPhMcLhPfNWPpFrdFdFTtJ",
+		"nlgQJhJFlncMzMWZMFvw",
+		"mDdsDfHjHsjHdjTLfpDsbDcNzzwcRbZNZPMcCPWMRPMc",
+		"sqqdwffHjTmdmpffmLddTTGDnSJtJBShVVhrGVJtShrlBBnJ",
+		"CrcMcMDBCmLlZdSd",
+		"qPjGjnQPqWjgZmTdlFwTmqLJ",
+		"bnPnnzHjbPznzVpdpVDcvprr",
+		"TCScMQcQCrssJPQhQs",
+		"VpfnqqfdVVwpqvqwGbDPPsjgPShDSsJhlnSl",
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+		"QQPpPbPbDNplSJrCCj",
+		"VdMzffgnRmVdfVWRvlrCTjRlNBvrrlrr",
+		"mGgNdthhGgMWWtsFcHcHwqLqtH",
+		"HrPFVqVppVpDjFDrVbCpDFJSLsmwjhjGLLmthJLJLmZs",
+		"WWgRdMdRMnQnRzWvPSssPWssJmhsshtG",
+		"MnfvMlnQccvfMlcTRMQdRfpHPDDDpPrDTbTBNbHbHDCq",
+		"GWWRsSwLhWsRsSbsPttThZqrNBJJBgPNCJCCqNMNgP",
+		"HpVDTHzfFDpFfzHzFVcrBZCggMJBvNrNgcNNrM",
+		"jlVpVpVVQDHdFVlmmmQTlzpjjGstWLsSbsnnnStWLRhnht",
+		"prLMDDjNCLZbdFLGngdLBv",
+		"VQHmhWSSzhWHmPJRJhSmVHJPFvgTbtnTbBtGqbQnbdqgTFqG",
+		"RzwzzhwhwNCvvfpc",
+		"wQgmZnhmWVtwQmnnnQbQhzwsFcRPrFPvRJhPlPPBBBFvJv",
+		"DdjqMMGLLMMGqTGdMqdMLdBBJsJPJBJJrrBFcqRlPlqr",
+		"DsddsfMsWgfzftZb",
+		"lcqlFSFwBBPlNwPlvSlQfWsVLTQjzjWVfLsWVq",
+		"HMMbMHMtJHgFzzFrVVtfFQ",
+		"RMFpCDDFcCNBcZvP",
+		"gwDrClhppDDPwPhnmPlwDrlDjMFfMTjMTjJmRHHJBJRMJHGj",
+		"LbbZBSvSLVRHffHJHJGZ",
+		"WztdtLsSvNQStbbtzdStthWhnwnPBDclgwwnrwllCC",
+		"MnMMBppMBDWMhpnCDBgCBmRbstvPvvbGltSPVGlVPWVv",
+		"TrrddJHjNcTqrrqdFcqZwSvLSlGGPbtFRbLvFVSRPG",
+		"JTccqTcwNQcTJrZwNJcJqHwJBQDfhCBCpCQpmpDfMRfCfBpn",
+		"njVcjHfGjVjpTCpMWprW",
+		"tsSsQDvSqQshDhtmWpnQnmMmbrpdzM",
+		"FNhsDDLNLnNllBqfRJGBVHBPHRRBZZ",
+		"hFVdlFSFlfZdRhgWgdWnnnfGpMNfnLMQzQQjMD",
+		"RsrJRHsvBcvHBHjDMMpDQDjjzDHj",
+		"BcCmBqvrbbqJgmFZtWdRVSVV",
+		"FzzdDJrJCFSFRqLlwsgspsBCpL",
+		"HQdWhMZMVwqLMllw",
+		"bbQtcvZcmHtNPZcWthWRvrdrRzrSDfRSrzjJjR",
+		"bTFZzHjZNJHzLggsJgbdsWcdcShWCwsSSdvGvv",
+		"VDBmntntfCBGGGGhRc",
+		"fMnnPDfmDlmnMPmtmttnVlHzZzNLbFbLbhzJJjMgJFbb",
+		"GzgJGPRrMSgTgpgH",
+		"hcvWhBdhcfPFvmFQvwfbHMsMMbpDpTDSSHsHpd",
+		"LmcvFFlcWQlFlfPnRZPVCJzJClCz",
+		"DdCHCHrmHRgghTHH",
+		"pFVZFwfssMsgghML",
+		"tSnphvhtctSSQNDqNdmrWGvq",
+		"rqmtRmGmcWrRRQprRRnfbGMMlPGGPblwMbTP",
+		"BHHhVZSvDNdhvBVhshbzfPbTmDfnwPwzPgbl",
+		"ddvBsSSdsLdshLsLpmWqcWrCCrtFpQ",
+		"wZPCwdPCHrnLQCGZDcPRqllzqqBzjlqc",
+		"gMmgnJspsvTmWNVWNpTNWNcDcqVjqDcclhSzllRSDzqR",
+		"JnWsgMnngmttFWWMdrwCZwHfZfdfGdFd",
+		"wwgNgrsWvbfBrqqsWbjDCDDDCDCmFbSmLDLlSC",
+		"QdpdzQTVdzRMTVVzcHTQLnlFmZHPSChCmlDPPHnP",
+		"dRMLVttzzVtTVQVqrrrgBtsvWWwtNw",
+		"vtBvntlqMvfnTfPDPhdRNbhdTFzF",
+		"QLWcmrrcgmCgCcsgcQWlWWrrDjjzzjsdFDdRhPNDhhhzDzPF",
+		"GGWHcCQcCCSlmmBVMGVBfMqwJtqv",
+		"cfqfhDRwhqZgRgRzRvcfhBSrsBnrDBBJWrnrWrSmmr",
+		"VCTVjGCTCjFddQntmrsVsJvrtrrW",
+		"PFQGpFbvPRMNqgRq",
+		"MmDgZZGMjZGfZRFztzCtCjzSrF",
+		"cBNpPJpBdNntcBHBccJlsSVVzzSwlCRrCnzsFw",
+		"PPBJLPPBBLPHBNQgqfMQtmTftGGvhq",
+		"bbZnbnVVgVSnbgZtntZrltsprpMCJvpqdJmsCMMmvvCq",
+		"BjDcjLLDzNjLDcjDzhcDNLLLHdpmpHJsqsMMNfCHfJpspqvp",
+		"dFLTFBcBzjFLgTbQtRgTVTlZ",
+		"nqNnrBRjLnjLZCqGGlqSGWlWDS",
+		"mTJTTcTJJfJfhhhwMbQDPWCQFCRlbDCSDDPl",
+		"dhMcRgJmgRrBrrrNgrLZ",
+		"GvJvJSGZFrGmmbmCrWnhjncLctcWttVqjLBB",
+		"wDlTzwlHTncRTqnRBt",
+		"gspglgzDzdPDfpgfdDzsgMPGvZJBrrbZGJNFmCFvmFvFvM",
+		"RLjMZZzfvNLBdjQfBfQdhRfSTVlcVqGbGcLGlbmqLVccmm",
+		"FggHCwsggrWWtCHJDDHtWrTNNlqSnlTlnGVTmWGcbcbm",
+		"PtpttrwsJssPsdRQvphZNzdMBh",
+		"NqqpZBHqTBpPNpPpGwwMPGTJjjLjQljGmtLfftllbJQfGf",
+		"nHczcrSFnVWSlrltrgJmjLLQ",
+		"SvzcDDVVFzdzhndCFSvnhcDspRDRDMPpMHRNPPZqppwM",
+		"FRSbVCSFFCDMFjRMjSSVFSWggMmWtWngJWttWmmJctnt",
+		"BPwcQQcQqQmWHfgrfwrh",
+		"PPlBQdNQvdLzzvclczdNRSbpLSbRbDjFZFFZVsFs",
+		"wtrrVhBbpcZSSjBfSfmm",
+		"MDWTvTMGMRCDCTQWsvfrRjjFfHlFmjlmLlHl",
+		"gQrTQvQDssdNWGsTstcbptwVPqcbpNqttP",
+		"jtGSwGQczrzjtGzrcsJwMRqMVMwRVMWFvVTWFV",
+		"DhLgnDLndDHmLvWqpTHqHHVNqF",
+		"LhdmPhfgZnZDlPCPmDfljQtGsJtBsWjGJzJSWBjC",
+		"zHDjcjBjTfjjfGpf",
+		"NNFTnNwPNNdqnJdFnqqTgmgftfftrWCZGbmrpWttmW",
+		"FLJqVNVNhnwnTRsRQBlQzShs",
+		"HJGJGJzzHHQHfJHsnNsGMbccMrTgbr",
+		"vddSCCjdmVvDDmvmBVbbBchcrrcscMTTnscn",
+		"VjWdFCVVMWWmjdSVFSVpqwwZttfJJltJZqltppLw",
+		"SnmPBPBnMLnPBsSgSDqRNRRccDfNcNQQRg",
+		"lZVWtWVzCjvZzCCGzDwbwRwtqJwJNTtDfD",
+		"zCzHZFFFfdLnBfFf",
+		"NRBFpNNJgNbWbJLRpRbWNtNpZllCZdjjZfjPVljTVCZQltlV",
+		"sDqHmsHcDrwHhMDlfCQfVBjDPCTd",
+		"MnGGcqwhhsrchcmGpzRJSSGGJWJzbJBR",
+		"LBzjQQzcjWvHWLnVDdnHRffHDCVR",
+		"rmJSrPJJsbNZssGSPrFpddfGwDRRpVjVpCGdCp",
+		"mPsrmsNTrPNLTjQlWQhqLc",
+		"MSDFszbhbRRTRdwhtw",
+		"PWmCZCmZVvGqMcjmJRpdTTtdLpqwdlll",
+		"MWGmmCVHvMSBDSNbbHHS",
+		"mBwSBSfSPHZCLPZSWwfPppTndVpdVncFgcgPpP",
+		"rhQJjzQjrltJzGqCrGJTvgqRpnTgFgcFTVFqFR",
+		"QbhGMJrhzrhQGQCsjwMDNWBDSZBZwSBLmM",
+		"bQfDPgDQbQNGPgflWfvMZcRMMFmcvMfZ",
+		"BLqSssjnzpBwszqwzFCNMvzWvRvzCCZFvc",
+		"BpNpjnNHnSpssqLqrBLLHjdhTPPDgbggllldhTPdrrQh",
+		"CvCMqNWVVqqPvNvvChhhdSnFHwBdWwhfdS",
+		"gqTZGGjlmclrZjlmSndSDwfFhhDBHm",
+		"tRrZpgrcctbbltRpgtqCVJCvPsRvsvPCQPCLPz",
+		"dTjRdWDBRzvjfzTfvTJPtJttsSLqHsSQJw",
+		"hrJNmbnFNZrbhlCsqltqcQcQSQqwPL",
+		"pVNhFgZphZmjzvjGDJWzVJ",
+		"gWzQhCWbQnCCFgCJnFQnWCzwjrHjjHGTwHGrhLwjjjtStL",
+		"splcpqDNDqqcZqRlspwHbjVrjjHTrwSbtVNV",
+		"BpMslDqDmRDRsBRBJPPnbzCfvQgmCWJb",
+		"tRtgRQWCwlTglHZHTglCtTdbbfvhWpbSBbhWzzbfGpfhbb",
+		"cqZVMJmLqmNrsJMDbzGrGSvzGBhvvG",
+		"mmnJPMZcclFRdnQtCQ",
+		"QVQVqfFzVVQQrQwZsCTrBtTrccTtctcJRRjT",
+		"vNNPnvGbBtWBLvBf",
+		"mMHbfDfHdHGmnhDDqZFDzVSQzF",
+		"NNlTNFCRTrfllTZsPWSsFPfzJdVQVpDQVszQVtpbzJMVbJ",
+		"LNHjNHjmLLjNqvGgvVQJQDVLbDVDpdQQzQ",
+		"nqmqGHjwgHvgwGHjGgccNTSWrrlCZrFfPSFFCP",
+		"qWzCQqhPCHjHmqJhqvqmjRgSFMTFggMFTFVRVVTgTm",
+		"SptGsDlnGfnDLgTMTwgRFFFs",
+		"bBcntZdpGZZcctlGtDfnDnBCSWqJvQhqjqzjhJqJQCQWPd",
+		"SjZJrSSDShddqLvPqzzdwq",
+		"nTssfRpQQmQCHlPBBgGmwVGzwm",
+		"TWQsbCRQFHFWQRTpzRHRsRrMtDrjhjbtMbccrttJjJht",
+		"cCChVMwPPMHCPCCPrvJnntdTJSvTtdrSRt",
+		"FGfFDBhGGlfGGfWJWdbSRSnRNbTvdn",
+		"fGpGlDmBhflgfDFmmfFpcVzMzqZZzcCPQVZzqP",
+		"SmgtSjGPjppBjbqqWTCZDQTHHHTg",
+		"VsFfCzLvsMfzNfNRhVMslzlHqrWrQDQcqDqTrLWHcrWJJW",
+		"dsRdsNCvNMVpwPdnnGbbPb",
+	}
+	total := 0
+
+	// for str, idx in input {
+	// 	sm :=  sum_rucksack(str)
+	// 	fmt.printf("Line %d: %d\n", idx, sm)
+	// 	total += sm
+	// }
+
+	idx := 0
+	step := 3
+	for idx < len(input) {
+		upper_bound := idx + step
+		offset := min(len(input), upper_bound)
+		prio := find_common_item(input[idx:offset])
+		total += prio
+		idx = upper_bound
+	}
+	fmt.printf("Total: %d\n", total)
+}

odin/day03/scratch.py

@@ -0,0 +1,9 @@
+BOUND_a = ord('a')
+BOUND_z = ord('z')
+
+BOUND_Z = ord('Z')
+BOUND_A = ord('A')
+
+print(BOUND_z - ord('v'))
+print(25 - (BOUND_z - ord('v')))
+print((25 - (BOUND_z - ord('v'))) + 27)