oj.uz

답안 #25978

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
25978 2017-06-25T09:21:08 Z abcdef6199 마스코트 (JOI13_mascots) C++
100 / 100
 176 ms 108192 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long LL;
typedef pair<int, int> II;

const int N = 3000 + 10;
const int P = (int) 1e9 + 7;
int n, m, k;
int C[N][N];
int dp[N][N];
int fac[N * N];

int main() {
	scanf("%d%d", &n, &m);
	int r1 = n + 1, r2 = -1;
	int c1 = m + 1, c2 = -1;
	scanf("%d", &k);
	for (int i = 1; i <= k; ++i) {
		int x, y; scanf("%d%d", &x, &y);
		r1 = min(r1, x); r2 = max(r2, x);
		c1 = min(c1, y); c2 = max(c2, y);
	}

	fac[0] = 1;
	for (int i = 1; i <= n * m; ++i) fac[i] = (LL) fac[i - 1] * i % P;
	for (int i = 0; i <= max(n, m); ++i) {
		C[i][0] = 1;
		for (int j = 1; j <= i; ++j) {
			C[i][j] = C[i - 1][j - 1] + C[i - 1][j];
			if (C[i][j] >= P) C[i][j] -= P;
		}
	}

	int lx = r2 - r1 + 1;
	int ly = c2 - c1 + 1;
	dp[lx][ly] = fac[lx * ly - k];
	for (int i = lx; i <= n; ++i) for (int j = ly; j <= m; ++j) {
		if (i < n) dp[i + 1][j] = (dp[i + 1][j] + (LL) dp[i][j] * fac[j]) % P;
		if (j < m) dp[i][j + 1] = (dp[i][j + 1] + (LL) dp[i][j] * fac[i]) % P;
	}

	int ans = dp[n][m];
	int mul = (LL) C[n - lx][r1 - 1] * C[m - ly][c1 - 1] % P;
	cout << (LL) ans * mul % P;
	return 0;
}

Compilation message

mascots.cpp: In function 'int main()':
mascots.cpp:15:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &n, &m);
                       ^
mascots.cpp:18:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &k);
                 ^
mascots.cpp:20:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   int x, y; scanf("%d%d", &x, &y);
                                  ^

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 108192 KB Output is correct
2 Correct 0 ms 108192 KB Output is correct
3 Correct 0 ms 108192 KB Output is correct
4 Correct 0 ms 108192 KB Output is correct
5 Correct 0 ms 108192 KB Output is correct
6 Correct 0 ms 108192 KB Output is correct
7 Correct 0 ms 108192 KB Output is correct
8 Correct 0 ms 108192 KB Output is correct

Subtask #2
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 108192 KB Output is correct
2 Correct 0 ms 108192 KB Output is correct
3 Correct 0 ms 108192 KB Output is correct
4 Correct 0 ms 108192 KB Output is correct
5 Correct 0 ms 108192 KB Output is correct
6 Correct 0 ms 108192 KB Output is correct
7 Correct 0 ms 108192 KB Output is correct
8 Correct 0 ms 108192 KB Output is correct
9 Correct 0 ms 108192 KB Output is correct
10 Correct 0 ms 108192 KB Output is correct
11 Correct 0 ms 108192 KB Output is correct
12 Correct 0 ms 108192 KB Output is correct

Subtask #3
60.0 / 60.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 108192 KB Output is correct
2 Correct 0 ms 108192 KB Output is correct
3 Correct 3 ms 108192 KB Output is correct
4 Correct 19 ms 108192 KB Output is correct
5 Correct 16 ms 108192 KB Output is correct
6 Correct 46 ms 108192 KB Output is correct
7 Correct 23 ms 108192 KB Output is correct
8 Correct 39 ms 108192 KB Output is correct
9 Correct 96 ms 108192 KB Output is correct
10 Correct 156 ms 108192 KB Output is correct
11 Correct 109 ms 108192 KB Output is correct
12 Correct 106 ms 108192 KB Output is correct
13 Correct 3 ms 108192 KB Output is correct
14 Correct 86 ms 108192 KB Output is correct
15 Correct 176 ms 108192 KB Output is correct
16 Correct 123 ms 108192 KB Output is correct
17 Correct 113 ms 108192 KB Output is correct
18 Correct 176 ms 108192 KB Output is correct