#include <bits/stdc++.h> using namespace std; int main(){ string ss,s; cin>>s; long long n,m=0; for(int i=0;i<s.size();i++){ if(s[i]>='A'&&s[i]<='F'){ n=s[i]-'A'+10; }else{ n=s[i]-'0'; } m=m*16+n;//十进制：m } char c; if(m==0) ss="0"; while(m>0){ c=m%2+'0'; ss=c+ss; m=m/2; } //二进制：ss while((ss.size()%3!=0)){ ss='0'+ss; } int l=ss.size(); for(int i=0;i<l-2;i=i+3){ n=(ss[i]-'0')*4+(ss[i+1]-'0')*2+(ss[i+2]-'0')*1; cout<<n; } return 0; }