#include<iostream>
#include<algorithm>
#include<vector>

int main(){
    int N;
    std::cin >> N;
    std::vector<int> v(N);
    for(int i = 0; i < N; i++){
        std::cin >> v[i];
    }

    int high = 1e9;
    int low = -1e9;
    for(int i = 0; i < 100; i++){
        int midu = (2 * high + low) / 3;
		int midl = (high + 2 * low) / 3;

        long long cntu = 0;
		long long cntl = 0;
        for(int i = 0; i < N; i++){
            cntu += midu - v[i];
			cntl += midl - v[i];
        }
		
		if(std::abs(cntl) <= std::abs(cntu))high = midu;
		else low = midl;
		std::cerr << low << " " << high << std::endl;
    }

    long long ans = 0;
    for(int i = 0; i < N; i++){
       ans += std::abs(high - v[i]); 
    }
    std::cout << ans << std::endl;
}