#include <stdio.h>

typedef struct _list
{
    int size; //number of unique characters
    char* charList;
    int* freqList;
} List;

typedef struct _TreeNode {
    int freq;
    unsigned char asciiChar;
    struct _TreeNode *left;
    struct _TreeNode *right;
} TreeNode;

typedef struct _Node {
    TreeNode* ptr;
    struct _Node *next;
} Node;



List* find_frequency(char* filename);
void write_output_1(char* filename, List* countList);
Node* _pq_enqueue(Node **pq, TreeNode* new_object, int (*cmp_fn)(const void *, const void *));
void _print_node(Node *list, FILE* fp);
//int _print_fn(TreeNode* tree);
int _compare_fn(const void * num, const void *test);