#include <bits/stdc++.h>

#define endl '\n'

using namespace std;

void speed()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
}





int main()
{
    freopen("operationsJ.in", "r", stdin);
    freopen("operationsJ.out", "w", stdout);
    speed();
    int n;
    cin >> n;
    int a1,a2;
    cin >> a1;
    if(a1<0)a1*=-1;
    cout << a1 << endl;
    return 0;
}