pwm

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

int main()
{
    int c = getchar();

    while(c != EOF)
    {
    int a = c / (256/16);
    int b = 1<<a;
    b = b - 1;
    putchar((b & 0xFF00) >> 8);
    putchar(b & 0xFF);

    c = getchar();
    }
}