Submission #1095106

#	Time	Username	Problem	Language	Result	Execution time	Memory
1095106		SalihSahin	Portal (BOI24_portal)	C++14	Compilation error	0 ms	0 KiB

Main

#include <bits/stdc++.h>
#define pb push_back
#define int long long
using namespace std;

const int N = 3e5 + 5;
const int K = 20;
const int mod = 1e9 + 7;

int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
    int n;
    cin>>n;
    vector<array<int, 2> > p(n);
    vector<int> x(n), y(n);
    for(int i = 0; i < n; i++){
        cin>>p[i][0]>>p[i][1];
        x[i] = p[i][0];
        y[i] = p[i][1];
    }
    if(n <= 2){
        cout<<-1<<endl;
        return 0;
    }

    sort(x.begin(), x.end());
    sort(y.begin(), y.end());
    int df1 = 0, df2 = 0;
    for(int i = 0; i < n-1; i++){
        df1 = gcd(df1, x[i+1] - x[i]);
        df2 = gcd(df2, y[i+1] - y[i]);
    }
    cout<<df1 * df2<<endl;
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int32_t main()':
Main.cpp:31:15: error: 'gcd' was not declared in this scope
   31 |         df1 = gcd(df1, x[i+1] - x[i]);
      |               ^~~