Submission #249632

#	Time	Username	Problem	Language	Result	Execution time	Memory
249632		egekabas	Asceticism (JOI18_asceticism)	C++14	49 / 100	52 ms	25176 KiB

asceticism

#include <bits/stdc++.h>
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<ll, ll> pll;
typedef pair<ull, ull> pull;
typedef pair<int, int> pii;
typedef pair<ld, ld> pld;
const ll mod = 1e9+7;
ll n, k;
ll dp[3009][3009];
int main() {
    
    //freopen("in.txt", "r", stdin);
    //freopen("out.txt", "w", stdout);

    cin >> n >> k;
    for(ll i = 1; i <= n; ++i){
        dp[i][1] = 1;
        for(ll j = 1; j <= k; ++j){
            dp[i+1][j] += dp[i][j]*j;
            dp[i+1][j] %= mod;
            dp[i+1][j+1] += dp[i][j]*(i-j+1);
            dp[i+1][j+1] %= mod;
        }
    }
    cout << dp[n][k] << '\n';
}   

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