oj.uz

Submission #914139

# Submission time Handle Problem Language Result Execution time Memory
914139 2024-01-21T09:24:23 Z alexdd Tents (JOI18_tents) C++17
100 / 100
 110 ms 141704 KB 
#include<bits/stdc++.h>
using namespace std;
#define int long long
const int MOD = 1e9+7;
int put(int a, int exp)
{
    if(exp==0)
        return 1;
    if(exp%2==0)
        return put((a*a)%MOD,exp/2);
    else
        return (put((a*a)%MOD,exp/2)*a)%MOD;
}
int cm[3005][3005];
int fact[6005];
int comb(int x, int y)
{
    return cm[x][y];
}
int dp[3005][3005];
signed main()
{
    fact[0]=1;
    for(int i=1;i<=6000;i++)
        fact[i]=(fact[i-1]*i)%MOD;
    for(int i=0;i<=3000;i++)
    {
        for(int j=0;j<=i;j++)
        {
            if(i==j)
                cm[i][j]=1;
            else if(j==0)
                cm[i][j]=1;
            else
                cm[i][j]=(cm[i-1][j-1]+cm[i-1][j])%MOD;
        }
    }
    int n,m;
    cin>>n>>m;
    dp[n][m]=1;
    for(int i=n;i>=0;i--)
    {
        for(int j=m;j>=0;j--)
        {
            if(i==n && j==m)
                continue;
            dp[i][j] += dp[i+1][j];
            dp[i][j] += (dp[i+1][j+1] * (j+1) * 4LL)%MOD;
            dp[i][j] += (dp[i+1][j+2] * comb(j+2,2))%MOD;
            dp[i][j] += (dp[i+2][j+1] * (i+1) * (j+1))%MOD;
            dp[i][j]%=MOD;
        }
    }
    int sum=MOD-1;
    for(int i=0;i<=m;i++)
        sum=(sum+dp[0][i])%MOD;
    cout<<sum;
    return 0;
}

Subtask #1
48.0 / 48.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 71768 KB Output is correct
2 Correct 17 ms 71768 KB Output is correct
3 Correct 17 ms 73820 KB Output is correct
4 Correct 17 ms 74588 KB Output is correct
5 Correct 17 ms 73688 KB Output is correct
6 Correct 18 ms 74584 KB Output is correct
7 Correct 18 ms 73820 KB Output is correct
8 Correct 17 ms 74588 KB Output is correct
9 Correct 20 ms 74240 KB Output is correct
10 Correct 18 ms 75100 KB Output is correct
11 Correct 17 ms 73820 KB Output is correct
12 Correct 18 ms 75356 KB Output is correct

Subtask #2
52.0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 71768 KB Output is correct
2 Correct 17 ms 71768 KB Output is correct
3 Correct 17 ms 73820 KB Output is correct
4 Correct 17 ms 74588 KB Output is correct
5 Correct 17 ms 73688 KB Output is correct
6 Correct 18 ms 74584 KB Output is correct
7 Correct 18 ms 73820 KB Output is correct
8 Correct 17 ms 74588 KB Output is correct
9 Correct 20 ms 74240 KB Output is correct
10 Correct 18 ms 75100 KB Output is correct
11 Correct 17 ms 73820 KB Output is correct
12 Correct 18 ms 75356 KB Output is correct
13 Correct 17 ms 71712 KB Output is correct
14 Correct 22 ms 83044 KB Output is correct
15 Correct 74 ms 127640 KB Output is correct
16 Correct 21 ms 76628 KB Output is correct
17 Correct 30 ms 84960 KB Output is correct
18 Correct 33 ms 90192 KB Output is correct
19 Correct 79 ms 136020 KB Output is correct
20 Correct 66 ms 122448 KB Output is correct
21 Correct 51 ms 105556 KB Output is correct
22 Correct 50 ms 107900 KB Output is correct
23 Correct 40 ms 98132 KB Output is correct
24 Correct 110 ms 141704 KB Output is correct
25 Correct 95 ms 133488 KB Output is correct
26 Correct 89 ms 139604 KB Output is correct
27 Correct 97 ms 141652 KB Output is correct