#include<stdio.h>
int replace_Zeros_With_ones(int n)
{
    char str[20];
    printf(str, "%d", abs(n));
    for (int i = 0; str[i]; i++)
    {
        if (str[i] == '0') str[i] = '1';
    }
    int result = atoi(str);
    return(n < 0) ? -result : result;
}
int main() 
{
    int n;
    printf("Enter a number: ");
    scanf("%d", &n);
    printf("Modified number: %d\n", replace_Zeros_With_ones(n));
    return 0;
}