I do not know why my code is wrong, its just not right!

[fe ding]

Here is the question I am trying to solve:

There are a number of N students in open judge, and each of them has passed some questions on the open judge website. The Boss gave M questions, each time he asks a question, he will give a number K, you have to quickly answer the number of students with the number of questions K

Input Format:

In the first line, the integers N and m=M separated by two spaces indicating the number of people and the number of questions. In the second line, there are a number of N integers separated by spaces, indicating the number of questions each student has solved. Next, there are M rows, each with an integer, which represents a question from the Boss.

Output Format:

M lines, each line an integer, indicating the answer to the corresponding question.

Example Input:

7 4
6 2 1 2 6 2 5
6
5
8
2

Example Output:

2
1
0
3

Here is My code;

#include<bits/stdc++.h> 

using namespace std; 

const int maxn=100000+5; 

int n,m,a[maxn],b[maxn],tp[maxn];

int cnt; 

inline void merge(int l,int r) {

if(l>=r)return ; 

int mid=(l+r)/2;

int i=l,j=mid+1,k=l; 

  merge(l,mid); 

  merge(mid+1,r); 

  while(i<=mid&&j<=r) 

  { 

  if(a[i]<a[j])tp[k++]=a[i++]; 

  else tp[k++]=a[j++]; 

  }

while(i<=mid)tp[k++]=a[i++]; 

  while(j<=r)tp[k++]=a[j++];

for(int i=l;i<=r;i++)a[i]=tp[i]; } 

//bool apk; 

inline bool cmp(int x,int n) { 

     int l=1,r=n; 

  while(l<=r) {

int mid=(l+r)/2; 

  if(x==a[mid])

{ 

  return true; 

// apk=true; 

  break;

} 

  else if(x>a[mid]) { 

 l=mid+1;

} 

  else if(x<a[mid])

{

r=mid-1; 

  } 

  }

/*if(apk!=true)*/ 

  return false;

} 

signed main() {

ios::sync_with_stdio(0);

std::cin.tie(0); 

 cin>>n>>m;

for(int j=1;j<=n;j++)cin>>a[j]; 

  merge(1,n); 

  for(int i=1;i<=m;i++) { cnt=0; 

 cin>>b[i]; 

  for(int j=1;j<=n;j++)if(cmp(b[i],a[j]))cnt++;

cout<<cnt<<endl; 

  } 

  return 0; 

}

please help!