flip.cpp

#include <iostream>
#include <string>
using namespace std;
int main(){
        string input;
        cin >> input;
        for (string::size_type i = 0; i < input.length(); i++)
        {
                if (input[i] == '0')
                input[i] = '1';
                else input[i] = '0';
        }
        cout << endl << input;
}