Submission #1637

#	Time	Username	Problem	Language	Result	Execution time	Memory
1637		ainta	지우개 (GA4_eraser)	C++98	100 / 100	25 ms	1276 KiB

eraser

#include<stdio.h>
#include<algorithm>
using namespace std;
int w[100001],n,i;
long long c,s,g,res,Mod=1000000007;
int main()
{
	scanf("%d",&n);
	for(i=0;i<n;i++)scanf("%d",&w[i]);
	sort(w,w+n);
	for(i=n-1;i>=0;i--){
		if(i!=n-1 && w[i]!=w[i+1])
		{
			g=(g+s*c*w[i+1])%Mod;
			s=(s+c*w[i+1])%Mod;
			c=0;
		}
		c++;
		res=(res+g*w[i])%Mod;
	}
	printf("%lld\n",res);
}

• Subtask 1: 6 / 6
• Subtask 2: 7 / 7
• Subtask 3: 16 / 16
• Subtask 4: 17 / 17
• Subtask 5: 26 / 26
• Subtask 6: 28 / 28