A. Chewbaсca and Number

#include <iostream>
 
 
using namespace std;
 
 
int main() {
    // Write C++ code here
   string x;
    cin >> x;
    
    for(int i=0;i<x.size();i++){
if(i==0  && x[i]=='9'){
continue;
}
        if(x[i]>'4'  &&  x[i]<='9'){
            x[i]='9'-x[i]+'0';
        }
    }
   
   
   
   cout<<x;
 
    return 0;
}