171226_2998_8진수

//https://www.acmicpc.net/problem/2998 #include <iostream>

#include <string>

using namespace std;

int main()

{

string bin;

cin >> bin;

int l=bin.size();

int x;

int r=l%3;

if(r==1) cout << "1";

if(r==2)

{

if((bin[1]-'0')==0) cout << "2";

else cout << "3";

}

for(int i=r; i<l; i+=3)

{

x=(bin[i]-'0')*4+(bin[i+1]-'0')*2+(bin[i+2]-'0');

if(x==0) cout << "0";

else if(x==1) cout << "1";

else if(x==2) cout << "2";

else if(x==3) cout << "3";

else if(x==4) cout << "4";

else if(x==5) cout << "5";

else if(x==6) cout << "6";

else cout << "7";

}

}