답안 #19247

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
19247	2016-02-22T15:08:45 Z	gs14004	Uniting (kriii2_U)	C++14	4 / 4	10 ms	1116 KB

U

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <limits.h>
#include <stack>
#include <queue>
#include <map>
#include <set>
#include <algorithm>
#include <string>
#include <functional>
#include <vector>
#include <numeric>
#include <deque>
#include <utility>
#include <bitset>
#include <assert.h>
#include <iostream>
using namespace std;
typedef long long lint;
typedef long double llf;
typedef pair<int, int> pi;
const int mod = 1e9 + 7;
int n, a[100005];

int main(){
	scanf("%d",&n);
	lint s = 0, sc = 0, fc = 1;
	for(int i=0; i<n; i++){
		scanf("%d",&a[i]);
		s += a[i];
		sc += a[i] * a[i];
	}
	for(int i=2; i<=n; i++){
		fc *= (1ll * i * (i-1)) % mod;
        fc %= mod;
	}
	s = (s * s - sc) / 2;
	printf("%lld\n%lld",s,fc);
}

Compilation message

U.cpp: In function 'int main()':
U.cpp:28:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 |  scanf("%d",&n);
      |  ~~~~~^~~~~~~~~
U.cpp:31:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |   scanf("%d",&a[i]);
      |   ~~~~~^~~~~~~~~~~~

Subtask #1

4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	472 KB	Output is correct
2	Correct	0 ms	356 KB	Output is correct
3	Correct	0 ms	352 KB	Output is correct
4	Correct	0 ms	356 KB	Output is correct
5	Correct	0 ms	612 KB	Output is correct
6	Correct	1 ms	348 KB	Output is correct
7	Correct	0 ms	356 KB	Output is correct
8	Correct	0 ms	468 KB	Output is correct
9	Correct	0 ms	352 KB	Output is correct
10	Correct	1 ms	356 KB	Output is correct
11	Correct	1 ms	360 KB	Output is correct
12	Correct	1 ms	356 KB	Output is correct
13	Correct	1 ms	360 KB	Output is correct
14	Correct	1 ms	356 KB	Output is correct
15	Correct	1 ms	348 KB	Output is correct
16	Correct	1 ms	356 KB	Output is correct
17	Correct	1 ms	456 KB	Output is correct
18	Correct	1 ms	352 KB	Output is correct
19	Correct	1 ms	356 KB	Output is correct
20	Correct	1 ms	352 KB	Output is correct
21	Correct	2 ms	360 KB	Output is correct
22	Correct	1 ms	456 KB	Output is correct
23	Correct	2 ms	356 KB	Output is correct
24	Correct	2 ms	348 KB	Output is correct
25	Correct	2 ms	616 KB	Output is correct
26	Correct	2 ms	612 KB	Output is correct
27	Correct	2 ms	608 KB	Output is correct
28	Correct	2 ms	604 KB	Output is correct
29	Correct	3 ms	616 KB	Output is correct
30	Correct	2 ms	616 KB	Output is correct
31	Correct	3 ms	612 KB	Output is correct
32	Correct	3 ms	612 KB	Output is correct
33	Correct	3 ms	704 KB	Output is correct
34	Correct	3 ms	612 KB	Output is correct
35	Correct	3 ms	680 KB	Output is correct
36	Correct	3 ms	616 KB	Output is correct
37	Correct	3 ms	612 KB	Output is correct
38	Correct	4 ms	736 KB	Output is correct
39	Correct	4 ms	604 KB	Output is correct
40	Correct	4 ms	860 KB	Output is correct
41	Correct	7 ms	844 KB	Output is correct
42	Correct	6 ms	860 KB	Output is correct
43	Correct	7 ms	860 KB	Output is correct
44	Correct	5 ms	860 KB	Output is correct
45	Correct	5 ms	860 KB	Output is correct
46	Correct	5 ms	844 KB	Output is correct
47	Correct	4 ms	860 KB	Output is correct
48	Correct	5 ms	860 KB	Output is correct
49	Correct	10 ms	1084 KB	Output is correct
50	Correct	7 ms	1116 KB	Output is correct