#include <bits/stdc++.h>
using namespace std;
int grid[1005][1005];
vector<pair<int,int> > step;
void dfs(int x, int y){
if(x<0||x>1000||y<0||y>1000) return;
if(grid[x][y]) return;
grid[x][y]=1;
for(pair<int,int> i:step){
if(x+i.first>=0&&x+i.first<=1000&&y+i.second>=0&&y+i.second<=1000){
if(grid[x+i.first][y+i.second]==0) dfs(x+i.first,y+i.second);
}
}
}
int32_t main(){
ios::sync_with_stdio(0);
cin.tie(0);
int n;
cin >> n;
pair<int,int> arr[n];
for(int i=0; i<n; i++) cin >> arr[i].first >> arr[i].second;
if(n==2||n==1) cout << -1;
else{
int gx=-1,gy=-1;
for(int i=1; i<n; i++){
int dx=abs(arr[i].first-arr[0].first),dy=abs(arr[i].second-arr[0].second);
if(dx){
if(gx==-1) gx=dx;
else gx=gcd(gx,dx);
}
if(dy){
if(gy==-1) gy=dy;
else gy=gcd(gy,dy);
}
}
if(dx==-1||dy==-1) cout << -1;
else cout << dx*dy;
}
}
Compilation message
Main.cpp: In function 'int32_t main()':
Main.cpp:36:6: error: 'dx' was not declared in this scope; did you mean 'gx'?
36 | if(dx==-1||dy==-1) cout << -1;
| ^~
| gx
Main.cpp:36:14: error: 'dy' was not declared in this scope; did you mean 'gy'?
36 | if(dx==-1||dy==-1) cout << -1;
| ^~
| gy
