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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 |
---|---|---|---|---|---|---|---|---|---|
#384646 | #2438. Minimum Spanning Trees | james1BadCreeper | AC ✓ | 909ms | 3652kb | C++14 | 1.7kb | 2024-04-10 08:30:06 | 2024-04-10 08:30:06 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
const int P = 1e9 + 7;
inline int poww(int a, int b) {
int r = 1;
for (; b; b >>= 1, a = 1ll * a * a % P) if (b & 1) r = 1ll * r * a % P;
return r;
}
inline int inv(int x) { return poww(x, P - 2); }
int n, k, p[10];
int f[45][170], g[45][170], C[45][45];
void solve(void) {
cin >> n >> k;
for (int i = 0; i <= k; ++i) cin >> p[i], p[i] = 1ll * p[i] * inv(100) % P;
p[k + 1] = p[0];
for (int i = k; i >= 1; --i) p[i] = (p[i] + p[i + 1]) % P;
memset(f, 0, sizeof f); f[1][0] = 1;
for (int t = 1; t <= k; ++t) {
memset(g, 0, sizeof g);
for (int i = 1; i <= n; ++i) for (int j = 0; j <= (i - 1) * t; ++j) {
g[i][j] = f[i][j];
for (int x = 1; x < i; ++x) for (int y = 0; y + t <= j; ++y)
g[i][j] = (g[i][j] + 1ll * g[i - x][j - y - t] * f[x][y] % P * poww(p[t], x * (i - x)) % P * C[i - 1][x - 1]) % P;
}
memset(f, 0, sizeof f);
for (int i = 1; i <= n; ++i) for (int j = 0; j <= (i - 1) * t; ++j) {
f[i][j] = g[i][j];
for (int x = 1; x < i; ++x) for (int y = 0; y + t <= j; ++y)
f[i][j] = (f[i][j] - 1ll * g[i - x][j - y - t] * f[x][y] % P * poww(p[t + 1], x * (i - x)) % P * C[i - 1][x - 1]) % P;
}
}
for (int i = n - 1; i <= k * (n - 1); ++i) cout << (f[n][i] + P) % P << " \n"[i == k * (n - 1)];
}
int main(void) {
for (int i = 0; i <= 44; ++i)
for (int j = C[i][0] = 1; j <= i; ++j)
C[i][j] = (C[i - 1][j] + C[i - 1][j - 1]) % P;
ios::sync_with_stdio(0);
int T; cin >> T;
while (T--) solve();
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 909ms
memory: 3652kb
input:
200 3 1 50 50 3 2 0 50 50 3 3 25 25 25 25 8 1 41 59 7 3 37 30 7 26 3 3 16 12 18 54 9 2 9 43 48 9 3 3 40 42 15 9 1 29 71 9 2 40 42 18 5 1 76 24 5 1 39 61 9 2 23 38 39 10 4 18 15 34 2 31 7 2 23 28 49 9 4 15 13 25 19 28 7 1 64 36 6 1 50 50 9 1 4 96 4 1 64 36 9 2 24 45 31 9 2 3 61 36 9 1 65 35 8 4 6 1 3...
output:
500000004 500000004 375000003 125000001 406250003 109375001 250000002 265625002 562500004 858129220 40267248 73443306 307645653 13908396 542571454 781149891 223877799 478284083 469782292 483514097 271207900 851118600 686534546 708608005 271088002 536992004 107032001 243224002 763536836 20527108 7248...
result:
ok 200 lines