#include <stdio.h>

int main(void) {

    int n, n1, n2, n3, n4;
    scanf("%d", &n);

        n1 = n%10;
        n = n / 10;
        n2 = n % 10;
        n = n / 10;
        n3 = n % 10;
        n = n / 10;
        n4 = n % 10;
        if(n1 != 0){
            printf("%d%d%d%d\n", n1, n2, n3, n4);
        } else {
            if(n2 != 0){
                printf("%d%d%d\n", n2, n3, n4);
            } else {
                if(n3 != 0){
                    printf("%d%d\n", n3, n4);
                } else {
                    if(n4 != 0){
                        printf("%d", n4);
                    }
                }
            }
        }
    return 0;
}