Submission #15321

#TimeUsernameProblemLanguageResultExecution timeMemory
15321tonyjjw접미사 배열의 개수 (kriii3_W)C++98
10 / 46
14 ms9052 KiB
#include<stdio.h>
int n,m;
long long int dp[1010][1010];
int mod=1000000007;
int main(){
	int i,j;
	scanf("%d%d",&n,&m);
	for(i=1;i<=m;i++){
		dp[1][i]=1;
	}
	for(j=2;j<=n;j++){
		for(i=1;i<=m;i++){
			dp[j][i]=dp[j-1][i]*i+dp[j-1][i-1]*(j-i);
			dp[j][i]%=mod;
		}
	}
	printf("%lld",dp[n][m]);
}
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