JumpingOnTheCloudsRevisited.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 jumpingOnClouds function below.
int jumpingOnClouds(int c_count, int* c, int k) {
    int value = 100;
    for(int i = 0; ; i+=k)
    {
        if (i != 0)
        {
            if (i%c_count == 0)
            {
                break;
            }
        }
        if (c[(i+k)%c_count] == 1)
        {
            value -= 3;
        }
        else
        {
            value -=1;
        }
        printf("i = %d, value = %d, c[(i+k)%c_count] = %d\n", i, value, c[(i+k)%c_count]);
    }
    return value;
}

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

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

    char* n_endptr;
    char* n_str = nk[0];
    int n = strtol(n_str, &n_endptr, 10);

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

    char* k_endptr;
    char* k_str = nk[1];
    int k = strtol(k_str, &k_endptr, 10);

    if (k_endptr == k_str || *k_endptr != '\0') { exit(EXIT_FAILURE); }

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

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

    for (int i = 0; i < n; i++) {
        char* c_item_endptr;
        char* c_item_str = *(c_temp + i);
        int c_item = strtol(c_item_str, &c_item_endptr, 10);

        if (c_item_endptr == c_item_str || *c_item_endptr != '\0') { exit(EXIT_FAILURE); }

        *(c + i) = c_item;
    }

    int c_count = n;

    int result = jumpingOnClouds(c_count, c, k);

    fprintf(fptr, "%d\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;
}