demsolanxuathien2.c

#include <stdio.h>
void nhapmang(int n, int a[], int b[])
{
    for (int i = 0; i < n; i++)
    {
        scanf("%d", &a[i]);
        b[a[i]] = 1;
    }
}
int main()
{
    int t, c = 0;
    scanf("%d", &t);
    while (c < t)
    {
        printf("Test %d:\n", c + 1);
        int n, num, k = 0;
        scanf("%d", &n);
        int a[100], b[100000] = {0};
        nhapmang(n, a, b);
        for (int i = 0; i < n; i++)
        {
            num = 0;
            if (b[a[i]] == 1)
            {
                for (int j = 0; j < n; j++)
                {
                    if (a[i] == a[j])
                    {
                        b[a[i]] = 0;
                        num++;
                    }
                }
                printf("%d xuat hien %d lan\n", a[i], num);
            }
        }
        c++;
    }
    return 0;
}