#include<bits/stdc++.h> using namespace std;

int main(){ int a=6,b=9; int a1=a,b1=b;

int r=a%b;
while(r){
    a=b;
    b=r;
    r=a%b;
}
cout<<"至少"<<a1*b1/b<<"天爸爸妈妈同时来看他";
return 0;

}

葛子墨