oj.uz

답안 #2423

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
2423 2013-07-21T10:06:17 Z hana5505 지우개 (GA4_eraser) C++
13 / 100
 25 ms 4012 KB 
#include<stdio.h>
int mod=1000000007;
long long ar[100001];
long long aa[100001];
long long sum1[100001];
long long sum2[100001];
int main()
{
	long long s=0;
	int n,i,size=0;

	scanf("%d",&n);

	for(i=1;i<=n;i++){
		scanf("%lld",&ar[i]);
		aa[(int)ar[i]]++;
	}

	for(i=1;i<=100000;i++){
		if(aa[i])
			ar[++size]=i;
	}

	for(i=1;i<=size;i++){
		sum1[i]=(sum1[i-1]+(ar[i]*aa[ar[i]])%mod)%mod;
		sum2[i]=(sum2[i-1]+((( (ar[i]*aa[ar[i]])%mod )* (ar[i]*aa[ar[i]])%mod))%mod)%mod;
	}

	for(i=1;i<=size-2;i++){
		s+=(((aa[(int)ar[i]]*ar[i])%mod)*((((((sum1[size]-sum1[i]+mod)%mod)*((sum1[size]-sum1[i]+mod)%mod)-(sum2[size]-sum2[i]+mod)%mod)%mod)/2)%mod))%mod;
		s=s%mod;
	}

	printf("%lld",s);
}

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 4012 KB Output is correct
2 Correct 0 ms 4012 KB Output is correct
3 Correct 0 ms 4012 KB Output is correct
4 Correct 0 ms 4012 KB Output is correct
5 Correct 0 ms 4012 KB Output is correct
6 Correct 0 ms 4012 KB Output is correct
7 Correct 0 ms 4012 KB Output is correct
8 Correct 0 ms 4012 KB Output is correct
9 Correct 0 ms 4012 KB Output is correct
10 Correct 0 ms 4012 KB Output is correct

Subtask #2
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 4012 KB Output is correct
2 Correct 0 ms 4012 KB Output is correct
3 Correct 0 ms 4012 KB Output is correct
4 Correct 0 ms 4012 KB Output is correct
5 Correct 0 ms 4012 KB Output is correct
6 Correct 0 ms 4012 KB Output is correct
7 Correct 0 ms 4012 KB Output is correct
8 Correct 0 ms 4012 KB Output is correct
9 Correct 0 ms 4012 KB Output is correct
10 Correct 0 ms 4012 KB Output is correct

Subtask #3
0.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 4012 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 4012 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0.0 / 26.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 25 ms 4012 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0.0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 23 ms 4012 KB Output isn't correct
2 Halted 0 ms 0 KB -