#include <cstdio>
#include <iostream>

using namespace std;

int main()
{
    int N;
    while(scanf("%d", &N) != 0) {
        int exp = 0;
        int n = N;
        while(n % 10 == 0) {
            n /= 10;
            exp++;
        }
        n = n - 1;
        for (int i = 0; i<exp; i++) {
            n = n * 10;
        }
        printf("%d\n", n);
    }
    return 0;
}