用学校 z/k的人看成绩 看那些在50%内
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
while(sc.hasNext()) {
int x = sc.nextInt();
while (x-- > 0) {
int n = sc.nextInt();
int m = sc.nextInt();
int k = sc.nextInt();
int arr[] = new int[n];
int sum[] = new int[m + 1];
int count[] = new int[m + 1];
int i = 0;
int res = 0;
for (; i < n / 2; ++i) {
arr[i] = sc.nextInt();
sum[arr[i]]++;
count[arr[i]]++;
}
for (; i < n; i++) {
arr[i] = sc.nextInt();
count[arr[i]]++;
}
for(int i1 = 1 ; i1<= m ; i1++) {
int temp = count[i1]/k;
if(temp>=sum[i1])
res+=sum[i1];
else if(temp<sum[i1])
res+=temp;
}
System.out.println(res);
}
}
}
}