// Source: https://u...content-available-to-author-only...o.guide/general/io
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
float w, h;
float bmi = w / (h * h);
cout << bmi << endl;
if (bmi < 18.5) cout << "Thieu can";
else if (bmi >= 18.5 && bmi <= 22.9) cout << "Binh thuong";
else cout << "Thua can";
}
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