Submission #8417

#	Time	Username	Problem	Language	Result	Execution time	Memory
8417		tncks0121	Uniting (kriii2_U)	C++98	4 / 4	12 ms	1088 KiB

U

#define _CRT_SECURE_NO_WARNINGS
  
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <memory.h>
#include <math.h>
#include <assert.h>
#include <stack>
#include <queue>
#include <map>
#include <set>
#include <algorithm>
#include <string>
#include <functional>
#include <vector>
#include <deque>
#include <utility>
#include <bitset>
#include <limits.h>
#include <time.h>
  
using namespace std;
typedef long long ll;
typedef unsigned long long llu;
typedef double lf;
typedef unsigned int uint;
typedef long double llf;
typedef pair<int, int> pii;
 
int N;
ll res1, res2 = 1;
 
int main() {
    scanf("%d", &N);
     
    ll sum = 0;
    for(int i = 1; i <= N; i++) {
        int si; scanf("%d", &si);
        res1 += sum * si;
        sum += si;
    }
  
  for(int i = 2; i <= N; i++) {
    res2 *= i;
    res2 %= (ll)1e9 + 7;
    res2 *= i-1;
    res2 %= (ll)1e9 + 7;
  }
 
    printf("%lld\n%lld\n\n", res1, res2);
 
 
    return 0;
}

• Subtask 1: 4 / 4