#include <stdio.h>
#include <stdlib.h>

int main()
{
    int n;
    printf("Please enter a number(0-255):");
    scanf("%d", &n);

    printf("%d", (n >> 7) & 1);
    printf("_%d", (n >> 6) & 1);
    printf("_%d", (n >> 5) & 1);
    printf("_%d", (n >> 4) & 1);
    printf("_%d", (n >> 3) & 1);
    printf("_%d", (n >> 2) & 1);
    printf("_%d", (n >> 1) & 1);
    printf("_%d\n", (n >> 0) & 1);

    return 0;
}