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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3.  
  4. #define ll long long
  5.  
  6. void solve(){
  7.     int n;
  8.     cin>>n;
  9.     vector<int>a(n),b(n),c(n),d(n),e(n);
  10.     for(int i=0;i<n;i++)cin>>a[i];
  11.     for(int i=0;i<n;i++)cin>>b[i];
  12.     for(int i=0;i<n;i++)cin>>c[i];
  13.     for(int i=0;i<n;i++)cin>>d[i];
  14.     for(int i=0;i<n;i++)cin>>e[i];
  15.  
  16.     unordered_map<int,int>mp;
  17.     for(int i=0;i<n;i++){
  18.         for(int j=0;j<n;j++){
  19.             mp[a[i]+b[j]]++;
  20.         }
  21.     }
  22.  
  23.     int ans=0;
  24.  
  25.     for(int i=0;i<n;i++){
  26.         for(int j=0;j<n;j++){
  27.             for(int k=0;k<n;k++){
  28.                 ll req_sum=-(c[i]+d[j]+e[k]);
  29.                 ans+=mp[req_sum];
  30.             }
  31.         }
  32.     }
  33.  
  34.     cout<<ans<<"\n";
  35. }
  36.  
  37. int main(){
  38.     ios_base::sync_with_stdio(false);
  39.     cin.tie(NULL);
  40.     solve();
  41.     return 0;
  42. }
Success #stdin #stdout 0s 5316KB
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https://ideone.com/t6jnwr
language:
C++14 (gcc 8.3)
created:
12 days ago
visibility:
public

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