#include<stdio.h>
#define mod 1000000007
typedef long long lld;
lld n, s, sum, sqsum, fac=1;
int main(){
lld i;
scanf("%lld", &n);
for(i=0; i<n; i++){
scanf("%lld", &s);
sum+=s, sqsum+=s*s;
}
for(i=n; i>=2; i--){
fac=(fac*i)%mod;
fac=(fac*(i-1))%mod;
}
printf("%lld\n%lld", (sum*sum-sqsum)/2, fac);
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
1088 KB |
Output is correct |
| 2 |
Correct |
0 ms |
1088 KB |
Output is correct |
| 3 |
Correct |
0 ms |
1088 KB |
Output is correct |
| 4 |
Correct |
0 ms |
1088 KB |
Output is correct |
| 5 |
Correct |
0 ms |
1088 KB |
Output is correct |
| 6 |
Correct |
0 ms |
1088 KB |
Output is correct |
| 7 |
Correct |
0 ms |
1088 KB |
Output is correct |
| 8 |
Correct |
0 ms |
1088 KB |
Output is correct |
| 9 |
Correct |
0 ms |
1088 KB |
Output is correct |
| 10 |
Correct |
0 ms |
1088 KB |
Output is correct |
| 11 |
Correct |
0 ms |
1088 KB |
Output is correct |
| 12 |
Correct |
0 ms |
1088 KB |
Output is correct |
| 13 |
Correct |
0 ms |
1088 KB |
Output is correct |
| 14 |
Correct |
0 ms |
1088 KB |
Output is correct |
| 15 |
Correct |
0 ms |
1088 KB |
Output is correct |
| 16 |
Correct |
0 ms |
1088 KB |
Output is correct |
| 17 |
Correct |
0 ms |
1088 KB |
Output is correct |
| 18 |
Correct |
0 ms |
1088 KB |
Output is correct |
| 19 |
Correct |
0 ms |
1088 KB |
Output is correct |
| 20 |
Correct |
0 ms |
1088 KB |
Output is correct |
| 21 |
Correct |
0 ms |
1088 KB |
Output is correct |
| 22 |
Correct |
0 ms |
1088 KB |
Output is correct |
| 23 |
Correct |
0 ms |
1088 KB |
Output is correct |
| 24 |
Correct |
0 ms |
1088 KB |
Output is correct |
| 25 |
Correct |
0 ms |
1088 KB |
Output is correct |
| 26 |
Correct |
4 ms |
1088 KB |
Output is correct |
| 27 |
Correct |
4 ms |
1088 KB |
Output is correct |
| 28 |
Correct |
4 ms |
1088 KB |
Output is correct |
| 29 |
Correct |
4 ms |
1088 KB |
Output is correct |
| 30 |
Correct |
4 ms |
1088 KB |
Output is correct |
| 31 |
Correct |
4 ms |
1088 KB |
Output is correct |
| 32 |
Correct |
4 ms |
1088 KB |
Output is correct |
| 33 |
Correct |
4 ms |
1088 KB |
Output is correct |
| 34 |
Correct |
4 ms |
1088 KB |
Output is correct |
| 35 |
Correct |
4 ms |
1088 KB |
Output is correct |
| 36 |
Correct |
4 ms |
1088 KB |
Output is correct |
| 37 |
Correct |
4 ms |
1088 KB |
Output is correct |
| 38 |
Correct |
8 ms |
1088 KB |
Output is correct |
| 39 |
Correct |
8 ms |
1088 KB |
Output is correct |
| 40 |
Correct |
8 ms |
1088 KB |
Output is correct |
| 41 |
Correct |
8 ms |
1088 KB |
Output is correct |
| 42 |
Correct |
8 ms |
1088 KB |
Output is correct |
| 43 |
Correct |
8 ms |
1088 KB |
Output is correct |
| 44 |
Correct |
8 ms |
1088 KB |
Output is correct |
| 45 |
Correct |
8 ms |
1088 KB |
Output is correct |
| 46 |
Correct |
8 ms |
1088 KB |
Output is correct |
| 47 |
Correct |
12 ms |
1088 KB |
Output is correct |
| 48 |
Correct |
12 ms |
1088 KB |
Output is correct |
| 49 |
Correct |
8 ms |
1088 KB |
Output is correct |
| 50 |
Correct |
4 ms |
1088 KB |
Output is correct |
