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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. #define ll long long
  4. ll n,dem[10005];
  5. int main()
  6. {
  7.     ios_base::sync_with_stdio(false);
  8.     cin.tie(0);cout.tie(0);
  9.     cin>>n;
  10.     int deml=0;
  11.     for(int i=1;i<=10000;i++)
  12.     {
  13.         ll p=i*i;
  14.         ll g=n-p;
  15.         if(g<=0) break;
  16.         ll x=sqrt(g/2);
  17.         for(int j=i;j<=x;j++)
  18.         {
  19.             ll b=j*j;
  20.             ll c=g-b;
  21.             if(c<=0) break;
  22.             ll t=sqrt(c);
  23.             if(c==t*t&&dem[j]==0&&dem[t]==0)  deml++;
  24.         }
  25.         dem[i]=1;
  26.     }
  27.     cout<<deml;
  28.     return 0;
  29. }
Success #stdin #stdout 0.01s 5280KB
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https://ideone.com/6tRntd
language:
C++14 (clang 8.0)
created:
4 days ago
visibility:
public

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