#include <stdio.h>
#include <string.h>

int main ()
{
    char s[80];
    int c, flag;
    FILE *in;
    FILE *out;
    in=fopen("in.txt", "r");
    if (in==0)
    {
        fclose (in);
        return -1;
    }
    out=fopen("out.txt", "w");
    if (out==0)
    {
        fclose (in);
        fclose (out);
        return -1;
    }
    while ((c = fgetc(in))&&(c!=EOF))
    {
        if (c=='/')
        {
            c=fgetc(in);
            while (c!='/')
            {
                c=fgetc(in);
            }
            continue;
        }
        fputc (c, out);
    }

    fclose (out);
    return 0;
}