ecjtu-summer training #1 F (UVA 11461)
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#include <iostream>
#include <algorithm>
#include <cmath>
using namespace std;
int main() {
int a, b;
while (cin>>a>>b&&(a||b)) {
int n=sqrt(a);
int m=sqrt(b);
int num=m-n+1;
if(n*n<a){
num--;
}
cout<<num<<endl;
}
return 0;
}
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