Submission #16519

#	Time	Username	Problem	Language	Result	Execution time	Memory
16519		hongjun7	Uniting (kriii2_U)	C++98	4 / 4	11 ms	1084 KiB

U

#include<stdio.h>
int n, S, x;
long long A, B;
int main() {
	scanf("%d", &n);
	B = 1;
	for (int i = 1; i <= n; i++){
		scanf("%d", &x);
		A += S*x;
		S += x;
		B = B * i % 1000000007;
		if (i < n) B = B * i % 1000000007;
	}
	printf("%lld\n%lld", A, B);
}

• Subtask 1: 4 / 4