``

include<iostream>

using namespace std;

int main() { long long N; int a,last; cin >> N; if(N==0) cout << 0 << endl;

if(N>0) {
    while(N) {
        a=N%10;
        if(a!=0)
        printf("%d",a);
        N=N/10;
    }
}
if(N<0) {
    cout<<'-';
    N=-N;
    while(N) {
        a=N%10;
        if(a!=0)
        printf("%d",a);
        N=N/10;
    }

}

return 0;

}