今天來解YKL07(UVA11461)：Square Numbers

Square Numbers

找出a~b之間，開完更號還是int的數字
output有幾個

#include <iostream>
#include <cmath>
using namespace std;

int main() {
    int a, b;
    while (cin >> a >> b) {
        if (a == 0 && b == 0) {
            break;
        }
        int count = 0;
        for (int i = a; i <= b; i++) {
            double root = sqrt(i); 
            if (root == int(root)) { 
                count++;
            }
        }
        cout << count << endl;
    }
    return 0;
}