Submission #319528

#	Time	Username	Problem	Language	Result	Execution time	Memory
319528		mosiashvililuka	Asceticism (JOI18_asceticism)	C++14	4 / 100	1 ms	748 KiB

asceticism

#include<bits/stdc++.h>
using namespace std;
long long a,b,c,d,e,i,j,ii,jj,zx,xc,dp[3004][3004],mod=1000000007LL;
int main(){
	ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
	cin>>a>>b;
	dp[1][0]=1;
	for(i=1; i<a; i++){
		for(j=0; j<=min(b,i-1); j++){
			dp[i+1][j]+=dp[i][j]*(j+1);
			dp[i+1][j+1]+=dp[i][j]*(i-j);
		}
	}
	cout<<dp[a][b-1];
	return 0;
}

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