Submission #930895

#	Time	Username	Problem	Language	Result	Execution time	Memory
930895		manizare	Asceticism (JOI18_asceticism)	C++14	49 / 100	32 ms	25176 KiB

asceticism

#include <bits/stdc++.h>
#pragma GCC optimize("O3,unroll-loops")
#define pb push_back
#define F first
#define S second 
#define ld long double
#define all(a) a.begin(),a.end()
#define pii pair <int,int>
#define int long long 
#define PII pair<pii , pii>
#define sz(v) (int)v.size()
#define rep(i , a , b) for(int i=a;i <= (b);i++)
#define per(i , a , b) for(int i=a;i >= (b);i--)
#define deb(x) cout <<#x << " : " << x << "\n" ;
using namespace std ;
const int maxn = 3002 , mod = 1e9 + 7 , b = 56 , maxp = 15e5 + 10, inf=  1e9+10  , lg = 20;
int dp[maxn][maxn]; 

signed main() {
	ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int n , k ;
    cin >> n >> k ;
    dp[1][0] = 1;
    rep(i , 1 , n){
        rep(j , 0, k){
            dp[i+1][j] = (dp[i][j]*(j+1) + dp[i+1][j])%mod ;
            dp[i+1][j+1] = (dp[i][j] * (i-j) + dp[i+1][j+1])%mod ;
        }
    }
    cout << dp[n][k-1] << '\n'; 
}
/*

*/

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