#include <bits/stdc++.h>
#include <math.h>
#define yes (cout<<"Yes"<<endl)
#define no (cout<<"No"<<endl)
using namespace std;

int main() {
string s;cin>>s;
for(int i=0;i<s.size()-1;i++)cout<<s[i];
if(s[s.size()-1]=='1')cout<<0<<endl;
else cout<<1<<endl;
}