Help me in solving LCPPAS30 problem

My issue

check this

My code

#include <iostream>

using namespace std;

int main() {
    // your code goes here
    float temperature = 25.5;
    
    float kelvin = temperature + 273;
    
    cout << "Celsius- " << temperature << endl;
    cout << "Kelvin- " << kelvin << endl;

    return 0;
}

Learning course: Learn Programming and Problem Solving using C++
Problem Link: https://www.codechef.com/learn/course/sit-cpp-fall/PROGC01/problems/LCPPAS30