Submission #9293

#	Time	Username	Problem	Language	Result	Execution time	Memory
9293		cki86201	Uniting (kriii2_U)	C++98	4 / 4	12 ms	1088 KiB

U

#include<stdio.h>

#define ll long long
const int MOD = 1e9 + 7;

int main()
{
	int n;
	ll a = 0, b = 1, c = 1;
	scanf("%d%lld",&n,&b);--n;
	while(n--){
		int x;
		scanf("%d",&x);
		a += b*x;
		b += x;
		c *= (n+2);
		c %= MOD;
		c *= (n+1);
		c %= MOD;
	}
	printf("%lld\n%lld",a,c);
	return 0;
}

• Subtask 1: 4 / 4