Submission #9295

#	Time	Username	Problem	Language	Result	Execution time	Memory
9295		corea	Uniting (kriii2_U)	C++14	4 / 4	12 ms	1088 KiB

U

#include <stdio.h>



int main() {
	int N;
	scanf( "%d", &N );

	long long res = 0;
	long long s = 0;

	for( int i = 1; i <= N; i ++ ) {
		long long a;
		scanf( "%lld", &a );
		res += s * a;
		s += a;
	}

	printf( "%lld\n", res );
	s = 1;
	for( int i = 1; i < N; i ++ ) {
		s *= i;
		s %= 1000000007;
	}
	for( int i = 1; i <= N; i ++ ) {
		s *= i;
		s %= 1000000007;
	}
	printf( "%lld\n", s );
	return 0;
}

• Subtask 1: 4 / 4