path.c

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

int main(int argc, char *argv[]) {
  if (argc != 2) {
    fprintf(stderr, "[ERROR] Provide a path!\n");
    return 1;
  }

  char* path = argv[1];
  int slashes_to_delete = 0;
  for (int i = strlen(path) - 1; i >= 0; i--) {
    if (path[i] == '.') slashes_to_delete++;    
    if (slashes_to_delete > 0) {
      if (path[i] == '/') slashes_to_delete--;
      path[i] = '\1';
    }
  }
  printf("%s\n", path);
}