Submission #16519

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
16519	2015-08-27 02:13:24	hongjun7	Uniting (kriii2_U)	C++98	4 / 4	11 ms	1084 KiB

U

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#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);
}
 
 
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• Subtask 1: 4 / 4