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Submission #573301

# Submission time Handle Problem Language Result Execution time Memory
573301 2022-06-06T11:36:08 Z vladislav11 Calvinball championship (CEOI15_teams) C++14
10 / 100
 38 ms 65536 KB 
#include <bits/stdc++.h>

using namespace std;

using ll = long long;
const ll MOD = 1e9 + 7;

int n;
vector<int> a;
vector< vector<ll> > dp;

int main ()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    cin >> n;

    a.resize( n );

    for ( auto& el : a )
        cin >> el;

    dp.assign( n+1, vector<ll>( n+1, 0 ) );

    for ( int i=1; i<=n; i++ )
        dp[0][i] = 1;

    for ( int i=1; i<=n; i++ )
    for ( int j=1; j<=n; j++ )
    {
        if ( j+1 <= n )
            dp[i][j] = ( j*dp[i-1][j] + dp[i-1][j+1] ) % MOD;
        else
            dp[i][j] = j*dp[i-1][j] % MOD;
    }

    ll ans = 1;

    int maxi = 0;

    for ( int i=0; i<n; i++ )
    {
        for ( int j=1; j<a[i]; j++ )
            ans += dp[n-i-1][ max(maxi,j) ];

        ans %= MOD;
    }

    cout << ans;

    return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 0 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 2260 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 8148 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 38 ms 65536 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 38 ms 65536 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 36 ms 65536 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -