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Answer for the mail delivery problem using dynamic programming
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| # ron and math community post: https://www.youtube.com/post/Ugkx321bNyuBEYuPthOIEKpbaqz04Ujat1f_ | |
| def a(n): | |
| if n < 3: | |
| return 1 | |
| if n not in memo_a: | |
| memo_a[n] = a(n - 2) + a(n - 3) | |
| return memo_a[n] | |
| def b(n): | |
| if n not in memo_b: | |
| memo_b[n] = a(n - 1) + a(n - 2) | |
| return memo_b[n] | |
| memo_a = {} | |
| memo_b = {} | |
| print(a(19) + b(19)) # 351 |
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