oj.uz

Submission #1034073

# Submission time Handle Problem Language Result Execution time Memory
1034073 2024-07-25T09:29:20 Z vjudge1 Tents (JOI18_tents) C++14
100 / 100
 58 ms 82984 KB 
#include <bits/stdc++.h>
#define fi first
#define se second
#define ll long long
#define ull unsigned long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define pb push_back
#define taskname ""
using namespace std;
const int mod=1e9+7;
ll n,m,i,j,dp[5009][5009];
int main() {
	if (fopen(taskname".inp","r")) {
		freopen(taskname".inp","r",stdin);
		freopen(taskname".out","w",stdout);
	}
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
    cin>>n>>m;
    dp[0][0]=1;
    for(i=1;i<=m;i++)
        dp[0][i]=1;
    for(i=1;i<=n;i++)
    for(j=0;j<=m;j++){
        //TH1:
        dp[i][j]=dp[i-1][j];
        //TH2:
        if(j>=2) dp[i][j]+=dp[i-1][j-2]*j*(j-1)/2;
        //TH3:
        dp[i][j]+=dp[i-1][j-1]*j*4;
        if(i>=2) dp[i][j]+=dp[i-2][j-1]*j*(i-1);
        dp[i][j]%=mod;
    }cout<<(dp[n][m]+mod-1)%mod;
	return 0;
}

Compilation message

tents.cpp: In function 'int main()':
tents.cpp:15:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |   freopen(taskname".inp","r",stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
tents.cpp:16:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |   freopen(taskname".out","w",stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
48.0 / 48.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 604 KB Output is correct
4 Correct 1 ms 1116 KB Output is correct
5 Correct 0 ms 604 KB Output is correct
6 Correct 1 ms 1372 KB Output is correct
7 Correct 1 ms 860 KB Output is correct
8 Correct 1 ms 1372 KB Output is correct
9 Correct 1 ms 860 KB Output is correct
10 Correct 1 ms 1884 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 2140 KB Output is correct

Subtask #2
52.0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 604 KB Output is correct
4 Correct 1 ms 1116 KB Output is correct
5 Correct 0 ms 604 KB Output is correct
6 Correct 1 ms 1372 KB Output is correct
7 Correct 1 ms 860 KB Output is correct
8 Correct 1 ms 1372 KB Output is correct
9 Correct 1 ms 860 KB Output is correct
10 Correct 1 ms 1884 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 2140 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 3 ms 9820 KB Output is correct
15 Correct 38 ms 55376 KB Output is correct
16 Correct 3 ms 4188 KB Output is correct
17 Correct 8 ms 12892 KB Output is correct
18 Correct 11 ms 17244 KB Output is correct
19 Correct 44 ms 63076 KB Output is correct
20 Correct 34 ms 51028 KB Output is correct
21 Correct 23 ms 33876 KB Output is correct
22 Correct 23 ms 35676 KB Output is correct
23 Correct 20 ms 27224 KB Output is correct
24 Correct 58 ms 82984 KB Output is correct
25 Correct 44 ms 63044 KB Output is correct
26 Correct 50 ms 71508 KB Output is correct
27 Correct 55 ms 79700 KB Output is correct