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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. map  <long long,long long> mapa,mapa1;
  4. int main(){
  5.     long long n,m,x,y;
  6.     long long red,kolona;
  7.     cin >> n >> m;
  8.     red = n;
  9.     kolona = n;
  10.     for(long i = 0; i < m; i++){
  11.         cin >> x >> y;
  12.         if(mapa.count(x) == false){
  13.             red--;
  14.         }
  15.         if(mapa1.count(y) == false){
  16.             kolona--;
  17.         }
  18.         mapa[x] = 1;
  19.         mapa1[y] = 1;
  20.     }
  21.     cout << n * n - red * kolona << endl;
  22. }
  23.  
Success #stdin #stdout 0s 4536KB
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https://ideone.com/XLdudo
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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