#include <iostream>
#include <cmath>
using namespace std;
int main() {
    double a = 0.1 + 0.2;
    double b = 0.3;
    if (a == b) {
        cout << "相等";
    } else if (abs(a - b) < 1e-9) {
        cout << "误差范围内相等";
    } else {
        cout << "不相等";
    }
    return 0;
}