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  1. #include<bits/stdc++.h>
  2. #define ll long long
  3. using namespace std;
  4. ll n,k,d[100],l,h, bd = 0,x,y,z,sum,kq;
  5.  
  6. string s;
  7. int main()
  8. {
  9.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  10.     freopen("HINHVUONG.inp", "r", stdin);
  11.     freopen("HINHVUONG.out", "w", stdout);
  12.     cin >> n >> k;
  13.     kq=k;
  14.     for(int i=2;i<=n;++i)
  15.     {
  16.         sum=k;
  17.         x=i*i*(i-1)*(n+1)/2;
  18.         sum-=x;
  19.         y=i*i;
  20.         if(sum%y==0&&sum>0)
  21.         {
  22.             ll t = sum/y;
  23.             ll tam = t/n;
  24.             tam*=n;
  25.             t -= tam;
  26.             if(t + i - 1 <= n)
  27.             kq=min(kq,sum/y);
  28.         }
  29.     }
  30.     cout<<kq;
  31. }
  32.  
Success #stdin #stdout 0s 5280KB
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https://ideone.com/emLAHc
language:
C++ (gcc 8.3)
created:
7 hours ago
visibility:
public

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