#include <stdio.h>

main()
{
    int fahr, celsius;
    int lower, upper, step;

    lower = 0;
    upper = 300;
    step = 20;

    printf("Cels\tFahr\n");

    celsius = lower;
    while (celsius <= upper) {
        fahr = (celsius / 5) * 9 + 32;
        printf("%4d\t%4d\n", celsius, fahr);
        celsius = celsius + step;
    }
}