SWEA 19113. 식료품 가게 (C++)

#include <stdio.h>
int N;
long long food[201];
int main()
{
    int tc = 0;
    scanf("%d", &tc);
    for (int t = 1; t <= tc; t++)
    {
        scanf("%d", &N);
        for (int i = 0; i < 2*N; i++)
        {
            scanf("%ld", &food[i]);
        }
        
        printf("#%d ", t);
        for (int i = 0; i < 2 * N - 1; i++)
        {
            if (food[i] && food[i] % 3 == 0)
            {
                long long origin = (food[i] / 3) * 4;
                for (int j = i + 1; j < 2 * N; j++)
                {
                    if (food[j] == origin)
                    {
                        printf("%ld ", food[i]);
                        food[j] = 0;
                        break;
                    }
                }
            }
        }
        printf("\n");
    }
    return 0;
}