Submission #205157

#	Time	Username	Problem	Language	Result	Execution time	Memory
205157		Atill83	Asceticism (JOI18_asceticism)	C++14	49 / 100	50 ms	25080 KiB

asceticism

#include <bits/stdc++.h>
#define ff first
#define ss second
#define endl '\n'
using namespace std;
const long long INF = (long long) 1e18;
const int mod = (int) 1e9+7;
const int MAXN = (int) 3e3+5;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
ll n, k;
ll dp[MAXN][MAXN];
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);cout.tie(nullptr);

    #ifdef Local
        freopen("C:/Users/Admin/Desktop/Yazilim/C/IO/int.txt","r",stdin);
        freopen("C:/Users/Admin/Desktop/Yazilim/C/IO/out.txt","w",stdout);
    #endif

    cin>>n>>k;
    dp[1][0] = 1;
    for(int i = 2; i <= n; i++){
        dp[i][0] = 1;
        for(int j = 1; j < k; j++){
            dp[i][j] = ((i - j)*dp[i - 1][j - 1] + dp[i - 1][j]*(j + 1))%mod;
        }
    }
    cout<<dp[n][k - 1]<<endl;

    #ifdef Local
        cout<<endl<<fixed<<setprecision(2)<<1000.0 * clock() / CLOCKS_PER_SEC<< " milliseconds ";
    #endif
}

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