Problem: problem

$ M $ students will be tested in a classroom with $ N $ seats in a straight line. Seats are numbered $ 1 \ dots N $ from the front, and $ 1 $ per seat can seat $ 1 $ students.

Now each student is sitting in the $ A_1, \ dots, A_M $ seats.

To start the test, the following conditions must be met:

* $ 1 \ dots M $ students are sitting in every seat.



Therefore, we decided to repeat the following operations until the conditions were met.

* Move the student sitting at the back and sit at the front of the vacant seats.



Find the number of operations required to meet the conditions.



output

Output the number of operations required to meet the conditions. Also, output a line break at the end.

Example

Input

6 4
1 4 5 6


Output

2

Solution (in CPP):

Solution:
#include<bits/stdc++.h>
using namespace std;

#define int long long

#define rep(i,n) for(int i=0;i<(n);i++)
#define pb push_back
#define all(v) (v).begin(),(v).end()
#define fi first
#define se second
typedef vector<int>vint;
typedef pair<int,int>pint;
typedef vector<pint>vpint;

template<typename A,typename B>inline void chmin(A &a,B b){if(a>b)a=b;}
template<typename A,typename B>inline void chmax(A &a,B b){if(a<b)a=b;}

signed main(){
    int N,M;
    cin>>N>>M;
    int ans=0;
    rep(i,M){
        int a;cin>>a;
        if(a>M)ans++;
    }

    cout<<ans<<endl;
    return 0;
}