#include <bits/stdc++.h>
using namespace std;
int main(){
	long long n,m;
	cin >> n;
	if (n < 0){ //判断是否为负数 
		n = 0 - n;
		cout << "-";
	}
	while (n >= 1){
		if (n % 10 == 0){ //去0 
			n /= 10;
		}
		m = n % 10;
		cout << m;
		n = (n - m) / 10;
	}
	return 0;
}