let n = 24;
let l = 0, r = 100, ans = n;
while(l <= r) {
   let mid = Math.floor((l + r) / 2);
   if(mid * mid <= n) {
       ans = mid;
       l = mid + 1;
   }
   else {
       r = mid - 1;
   }
}
print(ans);