Problem: This is the easy version of the problem. The difference between the versions is that the easy version has no swap operations. You can make hacks only if all versions of the problem are solved.

Pikachu is a cute and friendly pokémon living in the wild pikachu herd.

But it has become known recently that infamous team R wanted to steal all these pokémon! Pokémon trainer Andrew decided to help Pikachu to build a pokémon army to resist.

First, Andrew counted all the pokémon — there were exactly n pikachu. The strength of the i-th pokémon is equal to a_i, and all these numbers are distinct.

As an army, Andrew can choose any non-empty subsequence of pokemons. In other words, Andrew chooses some array b from k indices such that 1 ≤ b_1 < b_2 < ... < b_k ≤ n, and his army will consist of pokémons with forces a_{b_1}, a_{b_2}, ..., a_{b_k}.

The strength of the army is equal to the alternating sum of elements of the subsequence; that is, a_{b_1} - a_{b_2} + a_{b_3} - a_{b_4} + ....

Andrew is experimenting with pokémon order. He performs q operations. In i-th operation Andrew swaps l_i-th and r_i-th pokémon.

Note: q=0 in this version of the task.

Andrew wants to know the maximal stregth of the army he can achieve with the initial pokémon placement. He also needs to know the maximal strength after each operation.

Help Andrew and the pokémon, or team R will realize their tricky plan!

Input

Each test contains multiple test cases.

The first line contains one positive integer t (1 ≤ t ≤ 10^3) denoting the number of test cases. Description of the test cases follows.

The first line of each test case contains two integers n and q (1 ≤ n ≤ 3 ⋅ 10^5, q = 0) denoting the number of pokémon and number of operations respectively.

The second line contains n distinct positive integers a_1, a_2, ..., a_n (1 ≤ a_i ≤ n) denoting the strengths of the pokémon.

i-th of the last q lines contains two positive integers l_i and r_i (1 ≤ l_i ≤ r_i ≤ n) denoting the indices of pokémon that were swapped in the i-th operation.

It is guaranteed that the sum of n over all test cases does not exceed 3 ⋅ 10^5, and the sum of q over all test cases does not exceed 3 ⋅ 10^5. 

Output

For each test case, print q+1 integers: the maximal strength of army before the swaps and after each swap.

Example

Input


3
3 0
1 3 2
2 0
1 2
7 0
1 2 5 4 3 6 7


Output


3
2
9

Note

In third test case we can build an army in such way: [1 2 5 4 3 6 7], its strength will be 5−3+7=9.

Solution (in JAVA):

Solution:
//package Codeforces.Round672Div2;

import java.io.*;
import java.util.*;

public class C2 {
    public static boolean isMaxima(long[] arr, int i)
    {
        int n = arr.length;
        if(n==1)
            return true;
        return ((i==0 && arr[i]>arr[i+1]) || (i==n-1 && arr[i]>arr[i-1]) ||
                (i>0 && i<n-1 && arr[i]>arr[i+1] && arr[i]>arr[i-1]));
    }
    public static boolean isMinima(long[] arr, int i)
    {
        int n = arr.length;
        if(n==1)
            return true;
        return ((i==0 && arr[i]<arr[i+1]) || (i==n-1 && arr[i]<arr[i-1]) ||
                (i>0 && i<n-1 && arr[i]<arr[i+1] && arr[i]<arr[i-1]));
    }
    public static void swap(long[] arr, int i, int j)
    {
        long temp = arr[i];
        arr[i] = arr[j];
        arr[j] = temp;
    }
    public static long change(long[] arr, int l, int r, int sign)
    {
        int n = arr.length;
        while(l<0)
            l++;
        while(r>=n)
            r--;

        long sum = 0;
        for(int i=l;i<=r;i++)
        {
            if(isMaxima(arr, i))
            {
                sum += arr[i]*sign;
                //System.out.println("index: "+i);
            }
            else if(isMinima(arr, i) && i!=n-1 && i!=0)
            {
                sum -= arr[i]*sign;
                //System.out.println("indexMIN: "+i);
            }
        }

        //System.out.println("test: "+sum);
        return sum;
    }
    public static void main(String[] args) throws IOException {
        Soumit sc = new Soumit();

        int t = sc.nextInt();
        StringBuilder sb = new StringBuilder();
        while (t-->0)
        {
            int n = sc.nextInt();
            int q = sc.nextInt();
            long[] arr = sc.nextLongArray(n);

            boolean flag = true;
            long sum = 0;
            for(int i=0;i<n;i++)
            {
                if(flag)
                {
                    if(isMaxima(arr, i))
                    {
                        sum += arr[i];
                        flag ^= true;
                    }
                }
                else
                {
                    if(isMinima(arr, i) && i!=n-1)
                    {
                        sum -= arr[i];
                        flag ^= true;
                    }
                }
            }

            sb.append(sum).append("\n");

            while(q-->0)
            {
                int l = sc.nextInt()-1;
                int r = sc.nextInt()-1;

                if(l==r)
                    sb.append(sum).append("\n");
                else if(r-l==1)
                {
                    sum += change(arr, l-1, r+1, -1);
                    swap(arr, l, r);
                    sum += change(arr, l-1, r+1, +1);
                    sb.append(sum).append("\n");
                }
                else if(r-l==2)
                {
                    sum += change(arr, l-1, r+1, -1);
                    swap(arr, l, r);
                    sum += change(arr, l-1, r+1, +1);
                    sb.append(sum).append("\n");
                }
                else
                {
                    sum += change(arr, l-1, l+1, -1);
                    sum += change(arr, r-1, r+1, -1);
                    swap(arr, l, r);
                    sum += change(arr, l-1, l+1, +1);
                    sum += change(arr, r-1, r+1, +1);
                    sb.append(sum).append("\n");
                }
            }
        }

        System.out.println(sb);
        sc.close();
    }

    static class Soumit {
        final private int BUFFER_SIZE = 1 << 18;
        final private DataInputStream din;
        final private byte[] buffer;
        private PrintWriter pw;
        private int bufferPointer, bytesRead;
        StringTokenizer st;

        public Soumit() {
            din = new DataInputStream(System.in);
            buffer = new byte[BUFFER_SIZE];
            bufferPointer = bytesRead = 0;
        }

        public Soumit(String file_name) throws IOException {
            din = new DataInputStream(new FileInputStream(file_name));
            buffer = new byte[BUFFER_SIZE];
            bufferPointer = bytesRead = 0;
        }

        public void streamOutput(String file) throws IOException {
            FileWriter fw = new FileWriter(file);
            BufferedWriter bw = new BufferedWriter(fw);
            pw = new PrintWriter(bw);
        }

        public void println(String a) {
            pw.println(a);
        }

        public void print(String a) {
            pw.print(a);
        }

        public String readLine() throws IOException {
            byte[] buf = new byte[100064]; // line length
            int cnt = 0, c;
            while ((c = read()) != -1) {
                if (c == '\n')
                    break;
                buf[cnt++] = (byte) c;
            }
            return new String(buf, 0, cnt);
        }

        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        public int[] nextIntArray(int n) throws IOException {
            int[] arr = new int[n];
            for (int i = 0; i < n; i++) {
                arr[i] = nextInt();
            }

            return arr;
        }

        public long[] nextLongArray(int n) throws IOException {
            long[] arr = new long[n];
            for (int i = 0; i < n; i++) {
                arr[i] = nextLong();
            }

            return arr;
        }

        public double[] nextDoubleArray(int n) throws IOException {
            double[] arr = new double[n];
            for (int i = 0; i < n; i++) {
                arr[i] = nextDouble();
            }

            return arr;
        }

        public int nextInt() throws IOException {
            int ret = 0;
            byte c = read();
            while (c <= ' ')
                c = read();
            boolean neg = (c == '-');
            if (neg)
                c = read();
            do {
                ret = ret * 10 + c - '0';
            } while ((c = read()) >= '0' && c <= '9');

            if (neg)
                return -ret;
            return ret;
        }

        public long nextLong() throws IOException {
            long ret = 0;
            byte c = read();
            while (c <= ' ')
                c = read();
            boolean neg = (c == '-');
            if (neg)
                c = read();
            do {
                ret = ret * 10 + c - '0';
            }
            while ((c = read()) >= '0' && c <= '9');
            if (neg)
                return -ret;
            return ret;
        }

        public double nextDouble() throws IOException {
            double ret = 0, div = 1;
            byte c = read();
            while (c <= ' ')
                c = read();
            boolean neg = (c == '-');
            if (neg)
                c = read();

            do {
                ret = ret * 10 + c - '0';
            }
            while ((c = read()) >= '0' && c <= '9');

            if (c == '.') {
                while ((c = read()) >= '0' && c <= '9') {
                    ret += (c - '0') / (div *= 10);
                }
            }

            if (neg)
                return -ret;
            return ret;
        }

        private void fillBuffer() throws IOException {
            bytesRead = din.read(buffer, bufferPointer = 0, BUFFER_SIZE);
            if (bytesRead == -1)
                buffer[0] = -1;
        }

        private byte read() throws IOException {
            if (bufferPointer == bytesRead)
                fillBuffer();
            return buffer[bufferPointer++];
        }

        public void close() throws IOException {
            /*if (din == null)
                return;*/
            if (din != null) din.close();
            if (pw != null) pw.close();
        }
    }
}