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Submission #1014356

# Submission time Handle Problem Language Result Execution time Memory
1014356 2024-07-04T18:30:58 Z MarwenElarbi Tents (JOI18_tents) C++17
100 / 100
 166 ms 58960 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
using namespace __gnu_pbds;
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#define fi first
#define se second
#define ll long long
#define pb push_back
#define ii pair<int,int>
template <class T>
using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
const int nax=3e3+5;
const int MOD=1e9+7;
#define optimise ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
long long dp[nax][nax];
long long dfs(ll x,ll y){
    if(x<0||y<0) return 0;
    if(x==0) return 1;
    if(dp[x][y]) return dp[x][y];
    dp[x][y]+=dfs(x-1,y-2)*(y*(y-1)/2)%MOD;
    dp[x][y]%=MOD;
    dp[x][y]+=dfs(x-1,y)%MOD;
    dp[x][y]%=MOD;
    dp[x][y]+=dfs(x-1,y-1)*(y*4)%MOD;
    dp[x][y]%=MOD;
    dp[x][y]+=dfs(x-2,y-1)*(y*(x-1))%MOD;
    dp[x][y]%=MOD;
    return dp[x][y];
}
int main()
{
    optimise; 
    int n,m;
    cin>>n>>m;
    dp[0][0]=1;
    cout << dfs(n,m)-1<<endl;
}

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 348 KB Output is correct
3 Correct 1 ms 452 KB Output is correct
4 Correct 1 ms 1116 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 1372 KB Output is correct
7 Correct 1 ms 856 KB Output is correct
8 Correct 1 ms 1372 KB Output is correct
9 Correct 0 ms 980 KB Output is correct
10 Correct 1 ms 1884 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 2 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 348 KB Output is correct
3 Correct 1 ms 452 KB Output is correct
4 Correct 1 ms 1116 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 1372 KB Output is correct
7 Correct 1 ms 856 KB Output is correct
8 Correct 1 ms 1372 KB Output is correct
9 Correct 0 ms 980 KB Output is correct
10 Correct 1 ms 1884 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 2 ms 2140 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 4 ms 9820 KB Output is correct
15 Correct 117 ms 47444 KB Output is correct
16 Correct 2 ms 1624 KB Output is correct
17 Correct 12 ms 7004 KB Output is correct
18 Correct 29 ms 13756 KB Output is correct
19 Correct 136 ms 53328 KB Output is correct
20 Correct 106 ms 42140 KB Output is correct
21 Correct 56 ms 25412 KB Output is correct
22 Correct 69 ms 30912 KB Output is correct
23 Correct 58 ms 26432 KB Output is correct
24 Correct 166 ms 58960 KB Output is correct
25 Correct 116 ms 49236 KB Output is correct
26 Correct 138 ms 54608 KB Output is correct
27 Correct 159 ms 56956 KB Output is correct