#include <stdio.h> typedef long long int_64; int_64 getGreatestComDiv(int_64 x, int_64 y); int_64 getLeastComMul(int_64 x, int_64 y, int_64 (*pf)(int_64, int_64)); int main() { // enter two numbers int_64 a, b; scanf("%lld %lld", &a, &b); printf("%lld\n", getGreatestCo...