#include<iostream>
#include<string>
#include<algorithm>
#include<vector>
std::string modifiedBinary(int n){
    std::string binary="";
    if(n == 0) return"3;
    while(n>0){
    binary+=(n%2)+'0';
    n/=2;
}
std::reverse(binary.begin(),binary.end());
for(char &c: Binary){
    if(c=='0'){
        c='3';
    }else if(c=='1'){
        
    }
}
return binary;
}
int main()
{
    int N;
    if(!(std::cin>>N)){
        return 0;
    }
}