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暴力C500+MS,G++900+MS#include<stdio.h>
#include<stdlib.h>
int i,j,n,a[10001];
long long ans;
int main(){
scanf("%d",&n);
for(i=0;i<n;i++){
scanf("%d",&a[i]);
}
ans=0;
for(i=0;i<n;i++){
for(j=0;j<i;j++){
ans+=abs(a[i]-a[j]);
}
}
ans*=2;
printf("%lld",ans);
return 0;
}
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