#include<stdio.h>
#include<string.h>
int main() {
    int n;
    scanf("%d", &n);
    int isNegative = 0;
    if (n < 0) {isNegative = 1;
    n = abs(n);
        
        if (n == 0) {
            printf("1");
            return 0;
        }
        int result = 0, place = 1;
        while (n > 0) {
            int digit = n % 10;
            if(digit == 0)
               digit = 1;
        result = result + digit * place;
        place *= 10'
        n /= 10;
        }
        if(isNegative)
        result = -result;
        printf("%d", result);
        return 0;
    }
}