Average Value of Even Numbers That Are Divisible by Three - Problem

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

int solution(int* nums, int numsSize) {
    int totalSum = 0;
    int count = 0;
    
    for (int i = 0; i < numsSize; i++) {
        if (nums[i] % 2 == 0 && nums[i] % 3 == 0) {
            totalSum += nums[i];
            count++;
        }
    }
    
    return count > 0 ? totalSum / count : 0;
}

int main() {
    char line[10000];
    fgets(line, sizeof(line), stdin);
    
    // Parse JSON array properly
    int nums[1000];
    int size = 0;
    char* ptr = line;
    
    // Find opening bracket
    while (*ptr && *ptr != '[') ptr++;
    if (*ptr) ptr++; // Skip '['
    
    while (*ptr && *ptr != ']') {
        // Skip whitespace and commas
        while (*ptr && (*ptr == ' ' || *ptr == '\t' || *ptr == ',')) ptr++;
        
        // Parse number if we found one
        if (*ptr && *ptr != ']' && (isdigit(*ptr) || *ptr == '-')) {
            nums[size++] = strtol(ptr, &ptr, 10);
        } else if (*ptr && *ptr != ']') {
            ptr++;
        }
    }
    
    int result = solution(nums, size);
    printf("%d\n", result);
    
    return 0;
}