#include <iostream>
#include<bits/stdc++.h>
using namespace std;
int main() {
// your code goes here
int n;
cin>>n;
string s = bitset<8> (n).to_string();
string v = s;
for(int i=0;i<s.length();i++)
{
if(i%2 == 0)
{
v[i]=s[i+1];
}else
{
v[i]=s[i-1];
}
}
int number = 0;
number = stoi(v,0,2);
cout<<number;
return 0;
}
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