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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. typedef long long ll;
  4. int main(){
  5.   ll n,m; cin>>n>>m;
  6.   while(m--){
  7.     ll r,c; cin>>r>>c;
  8.     set<pair<ll, ll>> a;
  9.     bool cancel=false;
  10.     for(int i=r-1; i<=r+1; i++){
  11.       for(int j=c-1; j<=c+1; j++){
  12.         if(a.count({i,j})) cancel=true;
  13.       }
  14.     }
  15.     if(!cancel) a.insert({r,c});
  16.     cout<<a.size()<<endl;
  17.   } 
  18. }
Success #stdin #stdout 0.01s 5320KB
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stdin
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4 3
1 1
2 2
2 3
stdout
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1
1
1
https://ideone.com/mDSZiK
language:
C++14 (gcc 8.3)
created:
13 hours ago
visibility:
public

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