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

typedef struct node {
    int val;
    struct node * next;
} node;

node add(node *list, int x){
  if(list == NULL){
    list = malloc(sizeof(node));
    list->next = x;
  }
  node *newNode = list;
  while (newNode->next != NULL) {
      newNode = newNode->next;
  }
  newNode->next = malloc(sizeof(node));
  newNode->next->val = x;
  newNode->next->next = NULL;
}

double mean(node *list){
   int count = 0;
   double sum = 0;
  while (list != NULL) {
    sum += list->val;
    count += 1;
    list = list->next;
  }
  return sum/count;
}

double smallest(node list){
  sortList(list);
  return list->val;
}

double largest(node list){
  sortList(list);
  node *newNode = list;
  while(newNode->next != NULL){
        newNode = newNode->next;
  }
  return newNode->val;
}

double median(node list){

}

void sortList(node *list) {
    node *tmpFirst = list;
    node *tmpNext = list->next;
    double tmp;
    while(tmpNext != NULL){
         while(tmpNext != tmpFirst){
              if(tmpNext->val < tmpFirst->val){
                      tmp = tmpFirst->val;
                      tmpFirst->val = tmpNext->val;
                      tmpNext->val = tmp;
              }
              tmpFirst = tmpFirst->next;
          }
        tmpFirst = list;
        tmpNext = tmpNext->next;
    }
}

int main(int argc, char *argv[]){

  node *list = NULL;
  list = malloc(sizeof(node));
  if (list == NULL) {
      return 1;
  }

  double upperBound;
  double lowerBound;

  if(argc == 3){
    sscanf(argv[1], "%lf", &lowerBound);
    sscanf(argv[2], "%lf", &upperBound);
    printf("Lower Bounds: %f\n", lowerBound);
    printf("Upper Bounds: %f\n", upperBound);
  }else if(argc == 2){
    sscanf(argv[1], "%lf", &lowerBound);
    printf("Lower Bounds: %f\n", lowerBound);
  }else if(argc == 1){
    printf("No bounds\n");
  }else{
    printf("error\n");
    return 1;
  }

  double number;

  while(scanf("%lf\n", &number) == 1){
    if((argc == 3 && number >= lowerBound && number <= upperBound) || (argc == 2 && number >= lowerBound) || argc == 1){
      add(list, number);
    }
  }

  double small = smallest(list);
  double large = largest(list);
  double meanVal = mean(list);
  //int median = median(list);

  printf("Mean: %lf", mean);

  return 0;
}