This problem asks to receive decimal input and use an if statement.

One can receive a decimal number in a standard way of your language, such as the double type in C++ or float type in Python.

For the received value \(X\), use an if statement to check if:

• it is greater than or equal to \(38.0\) \({}^\circ\)C,
• it is greater than or equal to \(37.5\) \({}^\circ\)C but less than \(38.0\) \({}^\circ\)C, and
• it is less than \(37.5\) \({}^\circ\)C,

and print the corresponding integer.

Alternatively, one can receive the input not as a decimal number but as a string, split it into the integer and fractional parts, and use an if statement to compare them.

Sample code (C++)

#include <bits/stdc++.h>
using namespace std;
int main() {
    double t;
    cin >> t;

    if (38.0 <= t) {
        cout << 1 << endl;
    }
    else if (37.5 <= t && t < 38.0) {
        cout << 2 << endl;
    }
    else {
        cout << 3 << endl;
    }
}

Sample code (Python)

t = float(input())

if 38.0 <= t:
    print(1)
elif 37.5 <= t < 38.0:
    print(2)
else:
    print(3)

Sample code (alternative solution, C++)

#include <bits/stdc++.h>
using namespace std;
int main() {
    int a, b;
    char c;
    cin >> a >> c >> b;
    if (38 <= a) {
        cout << 1 << endl;
    }
    else if (a == 37 && 5 <= b) {
        cout << 2 << endl;
    } 
    else {
        cout << 3 << endl;
    }
}