oj.uz

답안 #798698

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
798698 2023-07-31T00:55:57 Z raphaelp Zapina (COCI20_zapina) C++14
22 / 110
 1 ms 212 KB 
#include <bits/stdc++.h>
using namespace std;
int main()
{
    int N;
    cin >> N;
    vector<vector<long long>> Pascal(N + 2, vector<long long>(N + 2, 0));
    for (int i = 0; i <= N; i++)
    {
        Pascal[i][0] = 1;
    }
    for (int i = 1; i <= N; i++)
    {
        for (int j = 1; j <= N + 1; j++)
        {
            Pascal[i][j] = (Pascal[i - 1][j] + Pascal[i - 1][j - 1]) % 1000000007;
        }
    }
    long long tot = 1;
    for (int i = 0; i < N; i++)
    {
        tot = (tot * N) % 1000000007;
    }
    vector<vector<long long>> tab(N + 1, vector<long long>(N + 1, 0));
    tab[0][0] = 1;
    for (int i = 0; i < N; i++)
    {
        for (int j = 0; j <= N; j++)
        {
            if (tab[i][j] == 0)
                continue;
            for (int k = 0; k <= N - j; k++)
            {
                if (k == i + 1)
                    continue;
                tab[i + 1][j + k] += tab[i][j] * Pascal[N - j][k];
                tab[i + 1][j + k] = tab[i + 1][j + k] % 1000000007;
            }
        }
    }
    tot = (tot - tab[N][N]) % 1000000007;
    cout << tot;
}

Subtask #1
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct

Subtask #2
0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 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 1 ms 212 KB Output is correct
7 Incorrect 1 ms 212 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #3
0 / 55.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 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 1 ms 212 KB Output is correct
7 Incorrect 1 ms 212 KB Output isn't correct
8 Halted 0 ms 0 KB -