Created
June 16, 2017 21:54
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| long long fat(int n, int r) { | |
| if (n == 1) { | |
| return 1; | |
| } else if (r == 0) { | |
| return 0; | |
| } else { | |
| return fat(n, r - 1) + fat(n - 1, n - 1); | |
| } | |
| } |
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