Submission #9368

#	Time	Username	Problem	Language	Result	Execution time	Memory
9368		ainu7	Uniting (kriii2_U)	C++98	4 / 4	28 ms	2064 KiB

U

#include <math.h>
#include <stdio.h>
#include <string.h>
#include <vector>
#include <string>
#include <queue>
#include <map>
#include <algorithm>
#include <cmath>
#include <iostream>
#include <sstream>
#include <set>
#include <stdlib.h>
using namespace std;

const int mmod = 1000000007;

int main()
{
  int N;
  cin >> N;
  vector<int> S(N);
  for (int i=0; i<N; i++) cin >> S[i];

  long long res1 = 0, res2 = 1;
  
  long long ss = 0;
  for (int i=0; i<N; i++) {
    res1 += S[i] * ss;
    if (i) res2 = (res2 * i) % mmod;
    res2 = (res2 * (long long)(i+1)) % mmod;
    ss += S[i];
  }
  cout << res1 << endl;
  cout << res2 << endl;
}

• Subtask 1: 4 / 4