func_code_string: #include <stdio.h>   #include <math.h>   #include<bits/stdc++.h>   using namespace std;         // C = a^2 - b and C^2 = a^2 + b^2 hence (a^2 - b)^2 = a^2 + b^2 , evaluate and subtract then, a^2 = 2*b+1   // Since a^2 - b = C , then 2*b+1 - b = C , then C = b+1 !!!!! , We can observe that the difference between b and c are just 1   // b and c are nearly equal , so we must find integer  a  so that its square is odd number since odd / 2 gives you two numbers   // the floor and the ceil , which are basically b and b+1 -> b and c ^^      int main() {             int t;          scanf( %d ,&t);          while(t--) {              int n;              scanf( %d ,&n);              int odd_Square = sqrt(n << 1); // --> sqrt ( n / 2 );              printf( %d n ,(odd_Square-1) >> 1); // --> (odd_Square - 1) / 2 ;          }          return 0;      }   