#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <dirent.h>

main()
{
  DIR *d1, *d2;
  struct dirent *de1, *de2;
  struct stat buf;
  int any;

  any = 0;
  
  d1 = opendir(".");
  if (d1 == NULL) { perror("opendir ."); exit(1); }
  for (de1 = readdir(d1); de1 != NULL; de1 = readdir(d1)) {
    if (stat(de1->d_name, &buf) == 0) {
      if (S_ISDIR(buf.st_mode) && strcmp(de1->d_name, ".") != 0 &&
                                  strcmp(de1->d_name, "..") != 0) {
        d2 = opendir(de1->d_name);
        if (d2 == NULL) { perror(de1->d_name); exit(1); }
        for (de2 = readdir(d2); de2 != NULL; de2 = readdir(d2)) {
          if (strcmp(de2->d_name, "f1.txt") == 0) {
            printf("%s/%s\n", de1->d_name, de2->d_name);
            any = 1;
          }
        }
        closedir(d2);
      }
    }
  }
  closedir(d1);
  if (!any) printf("None Found\n");
  exit(0);
}