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December 3, 2023 13:13
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Advent of Code 2023, Day 1, Part 2
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| 10 OPEN 1, 8, 3, "INPUT.TXT,S,R" | |
| 20 S = 0 | |
| 30 INPUT#1, A$ | |
| 40 GOSUB 100 | |
| 50 S = S + C | |
| 60 IF ST = 0 GOTO 30 | |
| 70 CLOSE 1 | |
| 80 PRINT S | |
| 90 END | |
| 100 L = LEN(A$) | |
| 110 FOR I = 1 TO L | |
| 120 C1 = ASC(MID$(A$, I, 1)) | |
| 130 IF C1 >= 48 AND C1 <= 57 THEN I = L | |
| 140 NEXT I | |
| 150 FOR I = L TO 1 STEP -1 | |
| 160 C0 =ASC(MID$(A$, I, 1)) | |
| 170 IF C0 >= 48 AND C0 <= 57 THEN I = 1 | |
| 180 NEXT I | |
| 190 C = (C1 - 48) * 10 + C0 - 48 | |
| 200 RETURN |
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