Submission #1051446

#	Time	Username	Problem	Language	Result	Execution time	Memory
1051446		deera	Portal (BOI24_portal)	C++14	Compilation error	0 ms	0 KiB

Main

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

struct Portal {
    public:
        int x;
        int y;
};

void print(Portal p) {
    cout << p.x << " " << p.y << endl;
}

void solve() {
    int n;
    cin >> n;

    vector<Portal> portals(n);
    for (int i = 0; i < n; i++)
        cin >> portals[i].x >> portals[i].y;

    if (n <= 2) return (void)(cout << -1 << endl);

    int box_x = 0;
    int box_y = 0;
    Portal c = portals[0];

    for(auto p: portals) {
        box_x = __gcd(abs(p.x - c.x), box_x);
        box_y = __gcd(abs(p.y - c.x), box_y);
    }

    int n = box_x * box_y;
    if (n == 0) cout << -1 << endl;
    else cout << n << endl;

}

int main() {solve();}

Compilation message (stderr)

Main.cpp: In function 'void solve()':
Main.cpp:33:9: error: redeclaration of 'int n'
   33 |     int n = box_x * box_y;
      |         ^
Main.cpp:15:9: note: 'int n' previously declared here
   15 |     int n;
      |         ^