#include <stdio.h>
#include <stdlib.h>

int f(int a, int b) {
    int i = 0;
    while (!((a % i == 0) && (b % i == 0))) {
        i++;
    }
    return i;
}

int main() {
    int a = 9;
    int b = 73;
    printf("ppcm(%d, %d) = %d\n", a, b, f(a, b));
    exit(0);
}