9.22 阿里笔试第一题
测试用例正确，提交一直0%，求助，哪位大佬帮我看看呗，代码哪里有问题~
题目
代码
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.StreamTokenizer;
import java.util.HashSet;
public class Main {
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
StreamTokenizer st = new StreamTokenizer(br);
st.nextToken();
int g = (int)st.nval;
for (int z = 0; z < g; z++) {
st.nextToken();
int n = (int)st.nval;
st.nextToken();
int k = (int)st.nval;
if (k > n) {
System.out.println(0);
} else {
int[] in = new int[n];
int[] out = new int[n];
for (int i = 0; i < n; i++) {
st.nextToken();
in[i] = (int)st.nval;
}
for (int i = 0; i < n; i++) {
st.nextToken();
out[i] = (int)st.nval;
}
int count = 0;
HashSet<Integer> set = new HashSet<>();
HashSet<Integer> chadui = new HashSet<>();
for (int i = 0; i < k; i++) {
set.add(in[i]);
}
int i = k, j = 0;
while (j < n) {
if (set.contains(out[j])) {
set.remove(out[j]);
while (i < n && chadui.contains(in[i])) {
i++;
}
if (i < n) {
set.add(in[i]);
}
} else {
count++;
chadui.add(out[j]);
}
i++;
j++;
}
System.out.println(count);
}
}
}
} 
