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#include<stdio.h>
#include<math.h>
#include<iostream>
#include<algorithm>
using namespace std;
__int64 s[10009];
 
int main()
{
	__int64 n;
	while(scanf("%I64d",&n)!=EOF)
	{
		int i,j;
		__int64 add=0,all=0;
		for(i=1;i<=n;i++)
		{
			scanf("%I64d",&s[i]);
			add+=s[i];
		}
 
		sort(&s[1],&s[n+1]);
		for(i=1;i<n;i++)
		{
			add-=s[i];
			all+=(add-s[i]*(n-i))*2;
		}
 
		printf("%I64d\n",all);
	}
}

prog.c:3:19: error: iostream: No such file or directory
prog.c:4:20: error: algorithm: No such file or directory
prog.c:5: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘namespace’
prog.c:6: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘s’
prog.c: In function ‘main’:
prog.c:10: error: ‘__int64’ undeclared (first use in this function)
prog.c:10: error: (Each undeclared identifier is reported only once
prog.c:10: error: for each function it appears in.)
prog.c:10: error: expected ‘;’ before ‘n’
prog.c:11: error: ‘n’ undeclared (first use in this function)
cc1: warnings being treated as errors
prog.c:11: error: ISO C does not support the 'I' scanf flag
prog.c:14: error: expected ‘;’ before ‘add’
prog.c:17: error: ‘s’ undeclared (first use in this function)
prog.c:17: error: ISO C does not support the 'I' scanf flag
prog.c:18: error: ‘add’ undeclared (first use in this function)
prog.c:21: error: implicit declaration of function ‘sort’
prog.c:25: error: ‘all’ undeclared (first use in this function)
prog.c:28: error: ISO C does not support the 'I' printf flag
prog.c:13: error: unused variable ‘j’

Standard output is empty