Submission #1054612

#	Time	Username	Problem	Language	Result	Execution time	Memory
1054612		anango	Portal (BOI24_portal)	C++17	10 / 100	43 ms	6432 KiB

Main

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



signed main() {
    int local = 0;
    if (local) {
        // for getting input from input.txt
        freopen("input.txt", "r", stdin);
        // for writing output to output.txt
        freopen("output.txt", "w", stdout);
    }
    #ifdef ONLINE_JUDGE
    	ios_base::sync_with_stdio(false);
    	cin.tie(NULL);
    #endif //fast IO
    int n; cin >> n;
    vector<pair<int,int>> cords;
    vector<int> xv;
    vector<int> yv;
    for (int i=0; i<n; i++) {
        int x,y; cin >> x >> y; 
        cords.push_back({x,y});
        xv.push_back(x);
        yv.push_back(y);
    }
    sort(xv.begin(), xv.end()); sort(yv.begin(), yv.end());
    int gx,gy;
    gx=gy=0;
    for (int i=0; i<n-1; i++) {
        gx=gcd(gx,xv[i+1]-xv[i]);
        gy=gcd(gy,yv[i+1]-yv[i]);
    }
    if (gx==0 || gy==0) {
        cout << -1 << endl;
        return 0;
    }
    cout << gx*gy << endl;
    
    
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:11:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |         freopen("input.txt", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:13:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |         freopen("output.txt", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 1
• Subtask 2: 0 / 10
• Subtask 3: 10 / 10
• Subtask 4: 0 / 29
• Subtask 5: 0 / 15
• Subtask 6: 0 / 35