oj.uz

Submission #1033966

# Submission time Handle Problem Language Result Execution time Memory
1033966 2024-07-25T08:09:17 Z vjudge1 Tents (JOI18_tents) C++14
100 / 100
 93 ms 70844 KB 
#pragma GCC optimize("O3,unroll-loops")
#include <bits/stdc++.h>
using namespace std;
#define name "aaaaaa"
using ll = long long;
using pll = pair<ll, ll>;
using ld = long double;

void file(){
    ios_base::sync_with_stdio(0); cin.tie(0);
    if(fopen(name".inp", "r")) {
        freopen(name".inp", "r", stdin);
        freopen(name".out", "w", stdout);
    }
}

const int maxn = 3e3 + 5;
const ll mod = 1e9 + 7;

ll dp[maxn][maxn];

void solve (){
	int n, m;
	cin >> n >> m;
	for(int i = 0; i < maxn; i++){
		dp[0][i] = 1;
		dp[i][0] = 1;
	}
	for(ll i = 1; i <= n; i++){
		for(ll j = 1; j <= m; j++){
			dp[i][j] += dp[i - 1][j];
			dp[i][j] += dp[i - 1][j - 1] * 4 * j % mod;
			if(j >= 2) dp[i][j] += dp[i - 1][j - 2] * (j * (j - 1) / 2 % mod) % mod;
			if(i >= 2) dp[i][j] += j * (i - 1) % mod * dp[i - 2][j - 1] % mod;
			dp[i][j] %= mod;
		}
	}
	dp[n][m]--;
	if(dp[n][m] < 0) dp[n][m] += mod;
	cout << dp[n][m];
}

int main(){
    file();
    int t = 1;
    //cin >> t;
    while(t--){
        solve();
    }
}

Compilation message

tents.cpp: In function 'void file()':
tents.cpp:12:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |         freopen(name".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
tents.cpp:13:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |         freopen(name".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
48.0 / 48.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 27740 KB Output is correct
2 Correct 7 ms 27728 KB Output is correct
3 Correct 5 ms 26204 KB Output is correct
4 Correct 5 ms 27884 KB Output is correct
5 Correct 7 ms 36188 KB Output is correct
6 Correct 5 ms 37980 KB Output is correct
7 Correct 5 ms 36188 KB Output is correct
8 Correct 6 ms 37980 KB Output is correct
9 Correct 6 ms 36188 KB Output is correct
10 Correct 7 ms 37980 KB Output is correct
11 Correct 5 ms 36212 KB Output is correct
12 Correct 8 ms 37904 KB Output is correct

Subtask #2
52.0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 27740 KB Output is correct
2 Correct 7 ms 27728 KB Output is correct
3 Correct 5 ms 26204 KB Output is correct
4 Correct 5 ms 27884 KB Output is correct
5 Correct 7 ms 36188 KB Output is correct
6 Correct 5 ms 37980 KB Output is correct
7 Correct 5 ms 36188 KB Output is correct
8 Correct 6 ms 37980 KB Output is correct
9 Correct 6 ms 36188 KB Output is correct
10 Correct 7 ms 37980 KB Output is correct
11 Correct 5 ms 36212 KB Output is correct
12 Correct 8 ms 37904 KB Output is correct
13 Correct 5 ms 37888 KB Output is correct
14 Correct 5 ms 36188 KB Output is correct
15 Correct 65 ms 61096 KB Output is correct
16 Correct 8 ms 38144 KB Output is correct
17 Correct 13 ms 37976 KB Output is correct
18 Correct 16 ms 38192 KB Output is correct
19 Correct 71 ms 65932 KB Output is correct
20 Correct 53 ms 56748 KB Output is correct
21 Correct 33 ms 43348 KB Output is correct
22 Correct 40 ms 47764 KB Output is correct
23 Correct 26 ms 44904 KB Output is correct
24 Correct 93 ms 70844 KB Output is correct
25 Correct 71 ms 62812 KB Output is correct
26 Correct 76 ms 67420 KB Output is correct
27 Correct 82 ms 69452 KB Output is correct