#include<stdio.h>
#include<algorithm>
#define T 1000000007
int n,c;
long long dtemp[100001],s[100001],temp[100001];
struct data
{
long long sum,val;
}; data d[100001];
void input()
{
int i;
scanf("%d",&n);
for(i=1; i<=n; i++) scanf("%lld",&dtemp[i]);
}
void process()
{
int i;
std::sort(dtemp+1,dtemp+n+1);
for(i=1; i<=n; i++){
if(dtemp[i]==d[c].val) d[c].sum+=dtemp[i];
else{
d[++c].val=dtemp[i];
d[c].sum=dtemp[i];
}
d[c].sum%=T;
}
for(i=1; i<=c; i++) s[i]=(s[i-1]+d[i].sum)%T;
for(i=1; i<=c; i++) temp[i]=(d[i].sum*s[i-1])%T;
for(i=1; i<=c; i++) s[i]=(s[i-1]+temp[i])%T;
for(i=1; i<=c; i++) temp[i]=(d[i].sum*s[i-1])%T;
for(i=1; i<=c; i++) s[i]=(s[i-1]+temp[i])%T;
printf("%lld\n",s[c]);
}
int main()
{
input();
process();
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
4792 KB |
Output is correct |
2 |
Correct |
0 ms |
4792 KB |
Output is correct |
3 |
Correct |
0 ms |
4792 KB |
Output is correct |
4 |
Correct |
0 ms |
4792 KB |
Output is correct |
5 |
Correct |
0 ms |
4792 KB |
Output is correct |
6 |
Correct |
0 ms |
4792 KB |
Output is correct |
7 |
Correct |
0 ms |
4792 KB |
Output is correct |
8 |
Correct |
0 ms |
4792 KB |
Output is correct |
9 |
Correct |
0 ms |
4792 KB |
Output is correct |
10 |
Correct |
0 ms |
4792 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
4792 KB |
Output is correct |
2 |
Correct |
0 ms |
4792 KB |
Output is correct |
3 |
Correct |
0 ms |
4792 KB |
Output is correct |
4 |
Correct |
0 ms |
4792 KB |
Output is correct |
5 |
Correct |
0 ms |
4792 KB |
Output is correct |
6 |
Correct |
0 ms |
4792 KB |
Output is correct |
7 |
Correct |
0 ms |
4792 KB |
Output is correct |
8 |
Correct |
0 ms |
4792 KB |
Output is correct |
9 |
Correct |
0 ms |
4792 KB |
Output is correct |
10 |
Correct |
0 ms |
4792 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
4792 KB |
Output is correct |
2 |
Correct |
0 ms |
4792 KB |
Output is correct |
3 |
Correct |
0 ms |
4792 KB |
Output is correct |
4 |
Correct |
0 ms |
4792 KB |
Output is correct |
5 |
Correct |
0 ms |
4792 KB |
Output is correct |
6 |
Correct |
0 ms |
4792 KB |
Output is correct |
7 |
Correct |
0 ms |
4792 KB |
Output is correct |
8 |
Correct |
0 ms |
4792 KB |
Output is correct |
9 |
Correct |
0 ms |
4792 KB |
Output is correct |
10 |
Correct |
0 ms |
4792 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
4792 KB |
Output is correct |
2 |
Correct |
0 ms |
4792 KB |
Output is correct |
3 |
Correct |
0 ms |
4792 KB |
Output is correct |
4 |
Correct |
0 ms |
4792 KB |
Output is correct |
5 |
Correct |
0 ms |
4792 KB |
Output is correct |
6 |
Correct |
0 ms |
4792 KB |
Output is correct |
7 |
Correct |
0 ms |
4792 KB |
Output is correct |
8 |
Correct |
0 ms |
4792 KB |
Output is correct |
9 |
Correct |
0 ms |
4792 KB |
Output is correct |
10 |
Correct |
0 ms |
4792 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
20 ms |
4792 KB |
Output is correct |
2 |
Correct |
3 ms |
4792 KB |
Output is correct |
3 |
Correct |
3 ms |
4792 KB |
Output is correct |
4 |
Correct |
15 ms |
4792 KB |
Output is correct |
5 |
Correct |
0 ms |
4792 KB |
Output is correct |
6 |
Correct |
14 ms |
4792 KB |
Output is correct |
7 |
Correct |
6 ms |
4792 KB |
Output is correct |
8 |
Correct |
23 ms |
4792 KB |
Output is correct |
9 |
Correct |
14 ms |
4792 KB |
Output is correct |
10 |
Correct |
20 ms |
4792 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
17 ms |
4792 KB |
Output is correct |
2 |
Correct |
2 ms |
4792 KB |
Output is correct |
3 |
Correct |
20 ms |
4792 KB |
Output is correct |
4 |
Correct |
3 ms |
4792 KB |
Output is correct |
5 |
Correct |
19 ms |
4792 KB |
Output is correct |
6 |
Correct |
3 ms |
4792 KB |
Output is correct |
7 |
Correct |
18 ms |
4792 KB |
Output is correct |
8 |
Correct |
20 ms |
4792 KB |
Output is correct |
9 |
Correct |
21 ms |
4792 KB |
Output is correct |
10 |
Correct |
16 ms |
4792 KB |
Output is correct |