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  1. Prepare
  2. C
  3. Arrays and Strings
  4. Dynamic Array in C
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Dynamic Array in C

  • nunoo50
     + 5 comments

    Hi, here is my solution with all the test cases passing.

    Also, just in case someone wonders why I didn't malloc *total_number_of_pages, that's because, malloc(size) = realloc(NULL,size);

    int main()
{
    int total_number_of_shelves;
    scanf("%d", &total_number_of_shelves);
    
    int total_number_of_queries;
    scanf("%d", &total_number_of_queries);
    
    total_number_of_pages= (int**)malloc(sizeof(int *)*total_number_of_shelves);
    total_number_of_books = (int *)malloc(sizeof(int)*total_number_of_shelves);
    int i =0;
    for(;i<total_number_of_shelves;i++){
        *(total_number_of_books+i)=0;
    }
    while (total_number_of_queries--) {
        int type_of_query;
        scanf("%d", &type_of_query);
        
        if (type_of_query == 1) {
            int x, y;
            scanf("%d %d", &x, &y);
            int booksInShelf = *(total_number_of_books + x);
            *(total_number_of_pages+x)=(int*)realloc(*(total_number_of_pages+x),sizeof(int)*(booksInShelf+1));
            *(*(total_number_of_pages+x)+booksInShelf)=y;
            *(total_number_of_books + x) += 1;