The legendary Farmer John is throwing a huge party, and animals from all over the world are hanging out at his house. His guests are hungry, so he instructs his cow Bessie to bring out the snacks! Moo!

There are n snacks flavors, numbered with integers 1, 2, …, n. Bessie has n snacks, one snack of each flavor. Every guest has exactly two favorite flavors. The procedure for eating snacks will go as follows:

  * First, Bessie will line up the guests in some way. 
  * Then in this order, guests will approach the snacks one by one. 
  * Each guest in their turn will eat all remaining snacks of their favorite flavor. In case no favorite flavors are present when a guest goes up, they become very sad. 



Help Bessie to minimize the number of sad guests by lining the guests in an optimal way.

Input

The first line contains integers n and k (2 ≤ n ≤ 10^5, 1 ≤ k ≤ 10^5), the number of snacks and the number of guests. 

The i-th of the following k lines contains two integers x_i and y_i (1 ≤ x_i, y_i ≤ n, x_i ≠ y_i), favorite snack flavors of the i-th guest.

Output

Output one integer, the smallest possible number of sad guests.

Examples

Input


5 4
1 2
4 3
1 4
3 4


Output


1


Input


6 5
2 3
2 1
3 4
6 5
4 5


Output


0

Note

In the first example, Bessie can order the guests like this: 3, 1, 2, 4. Guest 3 goes first and eats snacks 1 and 4. Then the guest 1 goes and eats the snack 2 only, because the snack 1 has already been eaten. Similarly, the guest 2 goes up and eats the snack 3 only. All the snacks are gone, so the guest 4 will be sad. 

In the second example, one optimal ordering is 2, 1, 3, 5, 4. All the guests will be satisfied.
import java.util.*;
import java.io.*;
 
 
public class gfg  {

    
    public static void main(String[] args) throws IOException{
        //Reader.init(System.in);
        //PrintWriter out = new PrintWriter(System.out);
        Reader.init(System.in);
        int t = 1;//Reader.nextInt();
        while(t-->0){
           solve();
        }
            //out.close();
    }
    
    static ArrayList<Integer>[] graph; 
    //static ArrayList<Integer>[] set;
    static int n=0;
    static int m=0;
    static boolean[] vis;
    static int[] color;
    //static char[][] arr;
    static long mod =1000000007;
    static int min=-1;
    static boolean invalid=false;
    static int[] dx = {0,0,-1,1};
    static int[] dy = {1,-1,0,0};
    static int count=0;
    static int edges=0;
    static char[][] arr;
    static boolean[][] reached;

    static void solve()throws IOException{
        n =Reader.nextInt();
        m = Reader.nextInt();
        graph = new ArrayList[n+1];
        vis = new boolean[n+1];
        for(int i=1;i<=n;i++){
            graph[i] = new ArrayList<Integer>();
        }

        for(int i=1;i<=m;i++){
            int a = Reader.nextInt();
            int b = Reader.nextInt();
            graph[a].add(b);
            graph[b].add(a);
        }
        for(int i=1;i<=n;i++){
            if(!vis[i])
                dfs(i);
        }
        System.out.println(m-count);
    }

    
    static void dfs(int a){ // u[ar = false means upar edge h;
        vis[a]=true;
        for(int i : graph[a]){
           if(!vis[i]){
                count++;
                dfs(i);
           }
        }
    }
    

    

    


    
    
    // ggratest common divisor
    static int gcd(int a , int b){
        if(b==0)
            return a;
        else
            return gcd(b,a%b);
    }
 
    // least common multiple
    static int lcm(int a, int b){
        return (a*b)/gcd(a,b);
    }
    
    // a^b
    static long fastpow(long a, long b){
        long res = 1;a=a%mod;
        while(b>0){
            if(b%2==1)
                res = (res*a)%mod;
            a = (a*a)%mod;
            b = b>>1;
        }
        return res;
    }
 
    
}
 
 
class Reader {
    static BufferedReader reader;
    static StringTokenizer tokenizer;
 
    /** call this method to initialize reader for InputStream */
    static void init(InputStream input) {
        reader = new BufferedReader(
                     new InputStreamReader(input) );
        tokenizer = new StringTokenizer("");
    }
 
    /** get next word */
    static String next() throws IOException {
        while ( ! tokenizer.hasMoreTokens() ) {
            //TODO add check for eof if necessary
            tokenizer = new StringTokenizer(
                   reader.readLine() );
        }
        return tokenizer.nextToken();
    }
 
    static int nextInt() throws IOException {
        return Integer.parseInt( next() );
    }
    static long nextLong() throws IOException {
        return Long.parseLong( next() );
    }
    
    static double nextDouble() throws IOException {
        return Double.parseDouble( next() );
    }
}
class newcomparator implements Comparator<Integer>{
    //@Override
    public int compare(Integer a, Integer  b){
        return a<=b?1:-1;
    }
 }
class node {
    int a;
    long b;// cost to rreach\
    node(int s,long va){
        a=s;
        b=va;
    }
}
class mergesort{
    static void sort(int l, int h, int[] arr){
        if(l<h){
            int mid = (l+h)/2;
            
            sort(l,mid,arr);
            sort(mid+1,h,arr);
            merge(l,mid,h,arr);
        }
    }
    static void merge(int l, int m , int h , int [] arr){
 
        int[] left = new int[m-l+1];
        int[] right = new int[h-m];
        for(int i= 0 ;i< m-l+1;i++){
            left[i] = arr[l+i];
        }
        for(int i=0;i<h-m;i++){
            right[i] = arr[m+1+i];
        }
        //now left and right arrays are assumed to be sorted and we have tp merge them together 
        // int the original aaray.
        int i=l;
        int lindex = 0;
        int rindex =  0;
        
        while(lindex<m-l+1 && rindex<h-m){
            if(left[lindex]<=right[rindex]){
                arr[i]=left[lindex];
                lindex++;
                i++;
            }
            else{
                arr[i]=right[rindex];
                rindex++;
                i++;
            }
        }
        while(lindex<m-l+1){
            arr[i]=left[lindex];
            lindex++;
            i++;
        }
        while(rindex<h-m){
            arr[i]=right[rindex];
            rindex++;
            i++;
        }
    }
    
}



