Submission #132825

#	Time	Username	Problem	Language	Result	Execution time	Memory
132825		duality	Asceticism (JOI18_asceticism)	C++11	49 / 100	69 ms	24824 KiB

asceticism

#include <bits/stdc++.h>
using namespace std;
#define mp make_pair
#define pb push_back
typedef long long int LLI;
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef vector<pii> vpii;
#define MOD 1000000007

LLI dp[3001][3001];
int main() {
    int N,K;
    cin >> N >> K;
    K--;

    int i,j;
    dp[1][0] = 1;
    for (i = 2; i <= N; i++) {
        dp[i][0] = 1;
        for (j = 1; j <= K; j++) dp[i][j] = (dp[i-1][j-1]*(i-j)+dp[i-1][j]*(j+1)) % MOD;
    }
    cout << dp[N][K] << endl;

    return 0;
}

• Subtask 1: 4 / 4
• Subtask 2: 20 / 20
• Subtask 3: 25 / 25
• Subtask 4: 0 / 51