Submission #1436285
Source Code Expand
#include "bits/stdc++.h" using namespace std; static const int MOD = 1000000007; long long extgcd(long long a, long long b, long long& x, long long& y) { long long d = a; if (b != 0) { d = extgcd(b, a % b, y, x); y -= (a / b) * x; } else { x = 1; y = 0; } return d; } long long inv(long long a) { long long x, y; extgcd(a, MOD, x, y); return (x % MOD + MOD) % MOD; } long long fact[1010]; long long nCr(long long n, long long r){ long long ans = fact[n] * inv(fact[r]) % MOD * inv(fact[n - r]) % MOD; return ans; } long long nHr(long long n, long long r) { return nCr(n + r - 1, r); } void init() { fact[0] = 1; for (int i = 1; i < 1010; i ++) fact[i] = fact[i - 1] * i % MOD; } int main() { init(); int i, j; long long n, k; cin >> n >> k; if (n > k) cout << nHr(n, k) % MOD << endl; else cout << nCr(n, k % n) % MOD << endl; return 0; }
Submission Info
Submission Time | |
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Task | B - 高橋幼稚園 |
User | KokiYmgch |
Language | C++14 (GCC 5.4.1) |
Score | 100 |
Code Size | 1122 Byte |
Status | AC |
Exec Time | 1 ms |
Memory | 256 KB |
Judge Result
Set Name | Sample | Subtask1 | Subtask2 | ||||||
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Score / Max Score | 0 / 0 | 80 / 80 | 20 / 20 | ||||||
Status |
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Set Name | Test Cases |
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Sample | subtask0_sample_01.txt, subtask0_sample_02.txt, subtask0_sample_03.txt |
Subtask1 | subtask0_sample_01.txt, subtask0_sample_02.txt, subtask1_01.txt, subtask1_02.txt, subtask1_03.txt, subtask1_04.txt, subtask1_05.txt, subtask1_06.txt, subtask1_07.txt, subtask1_08.txt, subtask1_09.txt, subtask1_10.txt, subtask1_11.txt, subtask1_12.txt, subtask1_13.txt, subtask1_14.txt, subtask1_15.txt, subtask1_16.txt, subtask1_17.txt, subtask1_18.txt, subtask1_19.txt |
Subtask2 | subtask0_sample_01.txt, subtask0_sample_02.txt, subtask0_sample_03.txt, subtask1_01.txt, subtask1_02.txt, subtask1_03.txt, subtask1_04.txt, subtask1_05.txt, subtask1_06.txt, subtask1_07.txt, subtask1_08.txt, subtask1_09.txt, subtask1_10.txt, subtask1_11.txt, subtask1_12.txt, subtask1_13.txt, subtask1_14.txt, subtask1_15.txt, subtask1_16.txt, subtask1_17.txt, subtask1_18.txt, subtask1_19.txt, subtask2_01.txt, subtask2_02.txt, subtask2_03.txt, subtask2_04.txt, subtask2_05.txt, subtask2_06.txt, subtask2_07.txt, subtask2_08.txt, subtask2_09.txt, subtask2_10.txt, subtask2_11.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
subtask0_sample_01.txt | AC | 1 ms | 256 KB |
subtask0_sample_02.txt | AC | 1 ms | 256 KB |
subtask0_sample_03.txt | AC | 1 ms | 256 KB |
subtask1_01.txt | AC | 1 ms | 256 KB |
subtask1_02.txt | AC | 1 ms | 256 KB |
subtask1_03.txt | AC | 1 ms | 256 KB |
subtask1_04.txt | AC | 1 ms | 256 KB |
subtask1_05.txt | AC | 1 ms | 256 KB |
subtask1_06.txt | AC | 1 ms | 256 KB |
subtask1_07.txt | AC | 1 ms | 256 KB |
subtask1_08.txt | AC | 1 ms | 256 KB |
subtask1_09.txt | AC | 1 ms | 256 KB |
subtask1_10.txt | AC | 1 ms | 256 KB |
subtask1_11.txt | AC | 1 ms | 256 KB |
subtask1_12.txt | AC | 1 ms | 256 KB |
subtask1_13.txt | AC | 1 ms | 256 KB |
subtask1_14.txt | AC | 1 ms | 256 KB |
subtask1_15.txt | AC | 1 ms | 256 KB |
subtask1_16.txt | AC | 1 ms | 256 KB |
subtask1_17.txt | AC | 1 ms | 256 KB |
subtask1_18.txt | AC | 1 ms | 256 KB |
subtask1_19.txt | AC | 1 ms | 256 KB |
subtask2_01.txt | AC | 1 ms | 256 KB |
subtask2_02.txt | AC | 1 ms | 256 KB |
subtask2_03.txt | AC | 1 ms | 256 KB |
subtask2_04.txt | AC | 1 ms | 256 KB |
subtask2_05.txt | AC | 1 ms | 256 KB |
subtask2_06.txt | AC | 1 ms | 256 KB |
subtask2_07.txt | AC | 1 ms | 256 KB |
subtask2_08.txt | AC | 1 ms | 256 KB |
subtask2_09.txt | AC | 1 ms | 256 KB |
subtask2_10.txt | AC | 1 ms | 256 KB |
subtask2_11.txt | AC | 1 ms | 256 KB |