完全平方数

https://ac.nowcoder.com/acm/contest/5203/C

#include<bits/stdc++.h>

using namespace std;
int n;
int l,r;
int ans;
int main() {
    //freopen("in","r",stdin);
    ios::sync_with_stdio(0);
   cin >> n;
   while(n--){
       ans = 0;
       cin >> l >> r;
       ans = (int)sqrt(r) - (int)sqrt(l);
       int t = (int)sqrt(l);
       if(t * t == l)
           ans++;
       cout << ans << endl;
   }

    return 0;
}