toj 2972 MOVING DHAKA

2972.   MOVING DHAKA

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Time Limit: 2.0 Seconds   Memory Limit: 65536K
Total Runs: 344   Accepted Runs: 97

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I am moving to Dhaka. I have many friends there. Since I shall visit all my friends very often, I am trying to find a house close to them.
I want to minimize the total distance to all of them and have blackmailed you to write a program that solves my problem.

Input

The input consists of several test cases. For each test case you will be given the integer number of friends r ( 0 < r < 1000000) and the street numbers (also integers) where they live ( 0 < si < 2000000000 ). Note that several relatives could live in the same street number.

Output

For each test case your program must write the minimal sum of distances from the optimal my house to each one of his relatives. The distance between two street numbers si and sj is dij= |si-sj|.

Sample Input

2
2 2 4
3 2 4 6

Sample Output

2
4

Problem Setter: Md. Shakil Ahmed.

Source: CUET Easy Contest

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#include <iostream>
#include <cmath>
#include <algorithm>
#define MAX 1000002
using namespace std;
int t,n;
int data[MAX];
bool comp(int a,int b)
{
    return a<b;
}
int main()
{
    scanf("%d",&t);
    while(t--)
    {
        int i;
        scanf("%d",&n);
        for(i=1;i<=n;i++)
            scanf("%d",&data[i]);
        sort(data+1,data+n+1,comp);
        long long sum=0;
        int mid=(n+1)/2;
        for(i=1;i<=n;i++)
        {
            sum+=abs(data[i]-data[mid]);
        }
        printf("%lld\n",sum);
    }
    return 0;
}