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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. #define int long long
  4.  
  5.  
  6.  
  7. int ans;
  8. main() {
  9.         ios_base::sync_with_stdio(0),cin.tie(0);
  10.         int t;cin>>t;
  11.         while(t--){
  12.                 vector<pair<int,int>>e;
  13.                 int n,m;cin>>n>>m;
  14.                 vector<int>dg(n);
  15.                 vector<vector<int>>g(n);
  16.                 for(int i=0;i<m;i++){
  17.                         int a,b;cin>>a>>b;a--,b--;
  18.                         e.push_back(make_pair(a,b));
  19.                         dg[a]++;
  20.                         dg[b]++;
  21.                         g[a].push_back(b);
  22.                         g[b].push_back(a);
  23.                 }
  24.  
  25.                 for(int i=0;i<n;i++)sort(g[i].begin(),g[i].end());
  26.  
  27.                 ans=0;
  28.                 for(int i=0;i<m;i++){
  29.                         ans+=dg[e[i].first]+dg[e[i].second]-2;
  30.                 }
  31.  
  32.  
  33.                 ans/=2;
  34.  
  35.                 for(int i=0;i<n;i++){
  36.                         for(auto j:g[i]){
  37.                                 if(j>i)break;
  38.                                 for(auto k:g[j]){
  39.                                         if(k>j)break;
  40.                                         if(binary_search(g[i].begin(),g[i].end(),k))ans-=3;
  41.                                 }
  42.                         }
  43.                 }
  44.  
  45.  
  46.                 cout<<ans<<endl;
  47.         }
  48. }
Runtime error #stdin #stdout 0s 5676KB
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Standard input is empty
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Standard output is empty
https://ideone.com/vtbFWm
language:
C++ (gcc 8.3)
created:
4 years ago
visibility:
public

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