| # |
제출 시각 |
아이디 |
문제 |
언어 |
결과 |
실행 시간 |
메모리 |
| 541444 |
2022-03-23T15:29:51 Z |
eecs |
NoM (RMI21_nom) |
C++17 |
|
107 ms |
428 KB |
#include <bits/stdc++.h>
using namespace std;
const int maxn = 4010, P = 1000000007;
int n, m, ans, fact[maxn], finv[maxn], f[2][maxn];
int qp(int x, int y) {
int z = 1;
for (; y; y >>= 1, x = 1LL * x * x % P) {
if (y & 1) z = 1LL * z * x % P;
}
return z;
}
int main() {
scanf("%d %d", &n, &m);
for (int i = fact[0] = finv[0] = 1; i < maxn; i++) {
fact[i] = 1LL * i * fact[i - 1] % P;
finv[i] = qp(fact[i], P - 2);
}
auto binom = [&](int x, int y) {
return x < y || y < 0 ? 0 : 1LL * fact[x] * finv[y] % P * finv[x - y] % P;
};
int cur = 0, nxt = 1;
f[0][0] = 1;
for (int i = 0; i < m; i++, swap(cur, nxt)) {
int l = (2 * n - i - 1) / m + 1;
memset(f[nxt], 0, sizeof(f[nxt]));
for (int j = 0; j <= n; j++) {
for (int k = 0; k <= min(j, l / 2); k++) {
f[nxt][j] = (f[nxt][j] + 1LL * f[cur][j - k] * binom(j, k) % P * fact[l] % P * finv[l - 2 * k]) % P;
}
}
}
for (int i = 0; i <= n; i++) {
ans = (ans + 1LL * f[cur][i] * binom(n, i) % P * fact[2 * n - 2 * i] % P * (i & 1 ? P - 1 : 1)) % P;
}
printf("%d\n", ans);
return 0;
}
Compilation message
Main.cpp: In function 'int main()':
Main.cpp:16:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
16 | scanf("%d %d", &n, &m);
| ~~~~~^~~~~~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| 3 |
Correct |
1 ms |
340 KB |
Output is correct |
| 4 |
Correct |
1 ms |
340 KB |
Output is correct |
| 5 |
Correct |
1 ms |
340 KB |
Output is correct |
| 6 |
Correct |
1 ms |
308 KB |
Output is correct |
| 7 |
Correct |
1 ms |
308 KB |
Output is correct |
| 8 |
Correct |
1 ms |
300 KB |
Output is correct |
| 9 |
Correct |
1 ms |
304 KB |
Output is correct |
| 10 |
Correct |
1 ms |
340 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| 3 |
Correct |
1 ms |
340 KB |
Output is correct |
| 4 |
Correct |
1 ms |
340 KB |
Output is correct |
| 5 |
Correct |
1 ms |
340 KB |
Output is correct |
| 6 |
Correct |
1 ms |
308 KB |
Output is correct |
| 7 |
Correct |
1 ms |
308 KB |
Output is correct |
| 8 |
Correct |
1 ms |
300 KB |
Output is correct |
| 9 |
Correct |
1 ms |
304 KB |
Output is correct |
| 10 |
Correct |
1 ms |
340 KB |
Output is correct |
| 11 |
Correct |
2 ms |
340 KB |
Output is correct |
| 12 |
Correct |
2 ms |
340 KB |
Output is correct |
| 13 |
Correct |
2 ms |
340 KB |
Output is correct |
| 14 |
Correct |
1 ms |
340 KB |
Output is correct |
| 15 |
Correct |
2 ms |
340 KB |
Output is correct |
| 16 |
Correct |
1 ms |
340 KB |
Output is correct |
| 17 |
Correct |
1 ms |
304 KB |
Output is correct |
| 18 |
Correct |
1 ms |
340 KB |
Output is correct |
| 19 |
Correct |
1 ms |
340 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| 3 |
Correct |
1 ms |
340 KB |
Output is correct |
| 4 |
Correct |
1 ms |
340 KB |
Output is correct |
| 5 |
Correct |
1 ms |
340 KB |
Output is correct |
| 6 |
Correct |
1 ms |
308 KB |
Output is correct |
| 7 |
Correct |
1 ms |
308 KB |
Output is correct |
| 8 |
Correct |
1 ms |
300 KB |
Output is correct |
| 9 |
Correct |
1 ms |
304 KB |
Output is correct |
| 10 |
Correct |
1 ms |
340 KB |
Output is correct |
| 11 |
Correct |
2 ms |
340 KB |
Output is correct |
| 12 |
Correct |
2 ms |
340 KB |
Output is correct |
| 13 |
Correct |
2 ms |
340 KB |
Output is correct |
| 14 |
Correct |
1 ms |
340 KB |
Output is correct |
| 15 |
Correct |
2 ms |
340 KB |
Output is correct |
| 16 |
Correct |
1 ms |
340 KB |
Output is correct |
| 17 |
Correct |
1 ms |
304 KB |
Output is correct |
| 18 |
Correct |
1 ms |
340 KB |
Output is correct |
| 19 |
Correct |
1 ms |
340 KB |
Output is correct |
| 20 |
Correct |
2 ms |
340 KB |
Output is correct |
| 21 |
Correct |
2 ms |
304 KB |
Output is correct |
| 22 |
Correct |
3 ms |
296 KB |
Output is correct |
| 23 |
Correct |
2 ms |
304 KB |
Output is correct |
| 24 |
Correct |
3 ms |
340 KB |
Output is correct |
| 25 |
Correct |
3 ms |
304 KB |
Output is correct |
| 26 |
Correct |
2 ms |
304 KB |
Output is correct |
| 27 |
Correct |
4 ms |
340 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| 3 |
Correct |
1 ms |
340 KB |
Output is correct |
| 4 |
Correct |
1 ms |
340 KB |
Output is correct |
| 5 |
Correct |
1 ms |
340 KB |
Output is correct |
| 6 |
Correct |
1 ms |
308 KB |
Output is correct |
| 7 |
Correct |
1 ms |
308 KB |
Output is correct |
| 8 |
Correct |
1 ms |
300 KB |
Output is correct |
| 9 |
Correct |
1 ms |
304 KB |
Output is correct |
| 10 |
Correct |
1 ms |
340 KB |
Output is correct |
| 11 |
Correct |
2 ms |
340 KB |
Output is correct |
| 12 |
Correct |
2 ms |
340 KB |
Output is correct |
| 13 |
Correct |
2 ms |
340 KB |
Output is correct |
| 14 |
Correct |
1 ms |
340 KB |
Output is correct |
| 15 |
Correct |
2 ms |
340 KB |
Output is correct |
| 16 |
Correct |
1 ms |
340 KB |
Output is correct |
| 17 |
Correct |
1 ms |
304 KB |
Output is correct |
| 18 |
Correct |
1 ms |
340 KB |
Output is correct |
| 19 |
Correct |
1 ms |
340 KB |
Output is correct |
| 20 |
Correct |
2 ms |
340 KB |
Output is correct |
| 21 |
Correct |
2 ms |
304 KB |
Output is correct |
| 22 |
Correct |
3 ms |
296 KB |
Output is correct |
| 23 |
Correct |
2 ms |
304 KB |
Output is correct |
| 24 |
Correct |
3 ms |
340 KB |
Output is correct |
| 25 |
Correct |
3 ms |
304 KB |
Output is correct |
| 26 |
Correct |
2 ms |
304 KB |
Output is correct |
| 27 |
Correct |
4 ms |
340 KB |
Output is correct |
| 28 |
Correct |
7 ms |
340 KB |
Output is correct |
| 29 |
Correct |
9 ms |
340 KB |
Output is correct |
| 30 |
Correct |
12 ms |
340 KB |
Output is correct |
| 31 |
Correct |
6 ms |
340 KB |
Output is correct |
| 32 |
Correct |
13 ms |
340 KB |
Output is correct |
| 33 |
Correct |
13 ms |
340 KB |
Output is correct |
| 34 |
Correct |
21 ms |
340 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| 3 |
Correct |
1 ms |
340 KB |
Output is correct |
| 4 |
Correct |
1 ms |
340 KB |
Output is correct |
| 5 |
Correct |
1 ms |
340 KB |
Output is correct |
| 6 |
Correct |
1 ms |
308 KB |
Output is correct |
| 7 |
Correct |
1 ms |
308 KB |
Output is correct |
| 8 |
Correct |
1 ms |
300 KB |
Output is correct |
| 9 |
Correct |
1 ms |
304 KB |
Output is correct |
| 10 |
Correct |
1 ms |
340 KB |
Output is correct |
| 11 |
Correct |
2 ms |
340 KB |
Output is correct |
| 12 |
Correct |
2 ms |
340 KB |
Output is correct |
| 13 |
Correct |
2 ms |
340 KB |
Output is correct |
| 14 |
Correct |
1 ms |
340 KB |
Output is correct |
| 15 |
Correct |
2 ms |
340 KB |
Output is correct |
| 16 |
Correct |
1 ms |
340 KB |
Output is correct |
| 17 |
Correct |
1 ms |
304 KB |
Output is correct |
| 18 |
Correct |
1 ms |
340 KB |
Output is correct |
| 19 |
Correct |
1 ms |
340 KB |
Output is correct |
| 20 |
Correct |
2 ms |
340 KB |
Output is correct |
| 21 |
Correct |
2 ms |
304 KB |
Output is correct |
| 22 |
Correct |
3 ms |
296 KB |
Output is correct |
| 23 |
Correct |
2 ms |
304 KB |
Output is correct |
| 24 |
Correct |
3 ms |
340 KB |
Output is correct |
| 25 |
Correct |
3 ms |
304 KB |
Output is correct |
| 26 |
Correct |
2 ms |
304 KB |
Output is correct |
| 27 |
Correct |
4 ms |
340 KB |
Output is correct |
| 28 |
Correct |
7 ms |
340 KB |
Output is correct |
| 29 |
Correct |
9 ms |
340 KB |
Output is correct |
| 30 |
Correct |
12 ms |
340 KB |
Output is correct |
| 31 |
Correct |
6 ms |
340 KB |
Output is correct |
| 32 |
Correct |
13 ms |
340 KB |
Output is correct |
| 33 |
Correct |
13 ms |
340 KB |
Output is correct |
| 34 |
Correct |
21 ms |
340 KB |
Output is correct |
| 35 |
Correct |
36 ms |
344 KB |
Output is correct |
| 36 |
Correct |
82 ms |
348 KB |
Output is correct |
| 37 |
Correct |
32 ms |
340 KB |
Output is correct |
| 38 |
Correct |
55 ms |
344 KB |
Output is correct |
| 39 |
Correct |
62 ms |
428 KB |
Output is correct |
| 40 |
Correct |
107 ms |
340 KB |
Output is correct |
