This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
const int maxn = 1e5 + 10;
int prefx[maxn], prefy[maxn];
int DistanceSum(int N, int *X, int *Y)
{
int x[maxn];
int y[maxn];
for(int i = 0; i < N; i++)
{
x[i] = X[i];
y[i] = Y[i];
}
sort(x, x + N);
sort(y, y + N);
for(int i = 0; i < N; i++)
{
if(i == 0) prefx[i] = x[i], prefy[i] = y[i];
else prefx[i] = x[i] + prefx[i - 1], prefy[i] = y[i] + prefy[i - 1];
//cout << prefx[i] << " " << prefy[i] << "\n";
}
int sum = 0;
for(int i = 0; i < N - 1; i++)
{
sum += prefx[N - 1] - prefx[i] - (N - i)*x[i];
sum += prefy[N - 1] - prefy[i] - (N - i)*y[i];
}
return sum;
}
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