organizing_containers_of_balls_hackerrank.c

#include <assert.h>
#include <limits.h>
#include <math.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

char* readline();
char** split_string(char*);

// Complete the organizingContainers function below.

// Please either make the string static or allocate on the heap. For example,
// static char str[] = "hello world";
// return str;
//
// OR
//
// char* str = "hello world";
// return str;
//
char* organizingContainers(int container_rows, int container_columns, int** container) {


}

int main()
{
    FILE* fptr = fopen(getenv("OUTPUT_PATH"), "w");

    char* q_endptr;
    char* q_str = readline();
    int q = strtol(q_str, &q_endptr, 10);

    if (q_endptr == q_str || *q_endptr != '\0') { exit(EXIT_FAILURE); }

    for (int q_itr = 0; q_itr < q; q_itr++) {
        char* n_endptr;
        char* n_str = readline();
        int n = strtol(n_str, &n_endptr, 10);

        if (n_endptr == n_str || *n_endptr != '\0') { exit(EXIT_FAILURE); }

        int** container = malloc(n * sizeof(int*));

        for (int i = 0; i < n; i++) {
            *(container + i) = malloc(n * (sizeof(int)));

            char** container_item_temp = split_string(readline());

            for (int j = 0; j < n; j++) {
                char* container_item_endptr;
                char* container_item_str = *(container_item_temp + j);
                int container_item = strtol(container_item_str, &container_item_endptr, 10);

                if (container_item_endptr == container_item_str || *container_item_endptr != '\0') { exit(EXIT_FAILURE); }

                *(*(container + i) + j) = container_item;
            }
        }

        int container_rows = n;
        int container_columns = n;

        char* result = organizingContainers(container_rows, container_columns, container);

        fprintf(fptr, "%s\n", result);
    }

    fclose(fptr);

    return 0;
}

char* readline() {
    size_t alloc_length = 1024;
    size_t data_length = 0;
    char* data = malloc(alloc_length);

    while (true) {
        char* cursor = data + data_length;
        char* line = fgets(cursor, alloc_length - data_length, stdin);

        if (!line) { break; }

        data_length += strlen(cursor);

        if (data_length < alloc_length - 1 || data[data_length - 1] == '\n') { break; }

        size_t new_length = alloc_length << 1;
        data = realloc(data, new_length);

        if (!data) { break; }

        alloc_length = new_length;
    }

    if (data[data_length - 1] == '\n') {
        data[data_length - 1] = '\0';
    }

    data = realloc(data, data_length);

    return data;
}

char** split_string(char* str) {
    char** splits = NULL;
    char* token = strtok(str, " ");

    int spaces = 0;

    while (token) {
        splits = realloc(splits, sizeof(char*) * ++spaces);
        if (!splits) {
            return splits;
        }

        splits[spaces - 1] = token;

        token = strtok(NULL, " ");
    }

    return splits;
}