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ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#18635 | #2329. Greenberg Mass Comparison | DoorKickers | WA | 3ms | 3556kb | C++20 | 1.0kb | 2022-01-22 19:43:06 | 2022-05-06 01:56:43 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
#define int long long
const int mod = 1e9 + 7;
signed main() {
auto fp = [&](int a, int n, int mod) {
int res = 1;
while (n) {if (n & 1) res = res * a % mod; a = a * a % mod; n >>= 1;}
return res;
};
auto inv = [&](int x) {
return fp(x, mod - 2, mod);
};
int tt; cin >> tt;
while (tt--) {
int n; cin >> n;
vector<int> jc(n + 5), invv(n + 5);
jc[0] = 1;
invv[0] = 1;
for (int i = 1; i <= n; i++) {
jc[i] = jc[i - 1] * i % mod;
invv[i] = inv(jc[i]);
}
vector<int> B(n + 5);
B[0] = 1;
auto C = [&](int big, int sml) {
return jc[big] * invv[sml] % mod * invv[big - sml] % mod;
};
for (int i = 1; i <= n; i++) {
for (int k = 0; k < i; k++) {
B[i] = C(i - 1, k) * B[k] % mod + B[i] % mod;
}
}
cout << B[n] << '\n';
}
return 0;
}
詳細信息
Test #1:
score: 0
Wrong Answer
time: 3ms
memory: 3556kb
input:
100 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100
output:
1 2 5 15 52 203 877 4140 21147 115975 678570 4213597 27644437 190899322 382958538 480142077 864869230 1076801392 742164233 1157873311 812832668 1706900325 1546020318 1173093234 759867260 1200033049 1040680584 159122123 665114805 1272358192 365885605 744733441 1692873102 1463056346 828412002 18177561...
result:
wrong answer 18th lines differ - expected: '76801385', found: '1076801392'