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 CPP):

Solution:
#include <bits/stdc++.h>
using namespace std;
inline long long readInt();
inline long long readUInt();
inline void readWord(char *s);
inline long long fast_readchar();
inline void writeInt(long long first);
inline void fast_writechar(long long first);
inline void writeWord(const char *s);
inline void fast_flush();
struct hash_pair {
  template <class T1, class T2>
  size_t operator()(const pair<T1, T2> &p) const {
    auto hash1 = hash<T1>{}(p.first);
    auto hash2 = hash<T2>{}(p.second);
    return hash1 ^ hash2;
  }
};
template <typename T>
vector<T> readvector(size_t sz) {
  vector<T> res(sz);
  for (size_t i = 0; i < sz; ++i) {
    cin >> res[i];
  }
  return res;
}
template <typename T, typename U>
std::ostream &operator<<(std::ostream &out, const std::pair<T, U> &p) {
  out << p.first << " " << p.second;
  return out;
}
template <typename T>
std::ostream &operator<<(std::ostream &out, const std::vector<T> &v) {
  std::copy(v.begin(), v.end(), std::ostream_iterator<T>(out, " "));
  return out;
}
inline long long binPow(long long first, long long deg, long long mod) {
  long long ans = 1;
  for (long long i = sizeof(deg) * CHAR_BIT - 1; i >= 0; i--) {
    ans *= ans;
    ans %= mod;
    if ((((deg) >> (i)) & 1)) ans *= first;
    ans %= mod;
  }
  return ans;
}
long long gcd(long long a, long long b) {
  while (b) {
    a %= b;
    swap(a, b);
  }
  return a;
}
const long long MAXN = 3e5 + 10;
const long long MOD = 1e9 + 7;
const long long INF = 1e18;
long long operator*(pair<long long, long long> A,
                    pair<long long, long long> B) {
  return A.first * B.first + A.second * B.second;
}
long long operator%(pair<long long, long long> A,
                    pair<long long, long long> B) {
  return A.first * B.second - A.second * B.first;
}
pair<long long, long long> operator*(pair<long long, long long> A,
                                     long long c) {
  return {A.first * c, A.second * c};
}
pair<long long, long long> operator-(pair<long long, long long> A,
                                     pair<long long, long long> B) {
  return {A.first - B.first, A.second - B.second};
}
pair<long long, long long> operator+(pair<long long, long long> A,
                                     pair<long long, long long> B) {
  return {A.first + B.first, A.second + B.second};
}
vector<pair<long long, long long> > D = {{-1, 0}, {1, 0}, {0, -1}, {0, 1}};
struct elem {
  long long max_odd, min_odd, max_even, min_even;
  long long value() { return max(max_odd, max_even); }
};
elem tree[MAXN * 4];
long long arr[MAXN];
elem merge(elem L, elem R) {
  return {max(L.max_even + R.max_odd, L.max_odd - R.min_even),
          min(L.min_even + R.min_odd, L.min_odd - R.max_even),
          max(L.max_even + R.max_even, L.max_odd - R.min_odd),
          min(L.min_even + R.min_even, L.min_odd - R.max_odd)};
}
void build(long long v, long long l, long long r) {
  if (l + 1 == r) {
    tree[v] = {arr[l], arr[l], 0, 0};
  } else {
    long long m = (l + r) / 2;
    build(v * 2 + 0, l, m);
    build(v * 2 + 1, m, r);
    tree[v] = merge(tree[v * 2 + 0], tree[v * 2 + 1]);
  }
}
inline void solve() {
  long long n, q;
  cin >> n >> q;
  for (long long i = 0; i < n; i++) {
    cin >> arr[i];
  }
  build(1, 0, n);
  cout << tree[1].value() << "\n";
}
signed main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  long long t = 1;
  cin >> t;
  for (long long i = 1; i <= t; ++i) {
    solve();
  }
  fast_flush();
  return 0;
}
static const long long buf_size = 4096;
inline long long fast_readchar() {
  static char buf[buf_size];
  static long long len = 0, pos = 0;
  if (pos == len) pos = 0, len = fread(buf, 1, buf_size, stdin);
  if (pos == len) return -1;
  return buf[pos++];
}
inline long long readUInt() {
  long long c = fast_readchar(), first = 0;
  while (c <= 32) c = fast_readchar();
  while ('0' <= c && c <= '9')
    first = first * 10 + c - '0', c = fast_readchar();
  return first;
}
inline long long readInt() {
  long long s = 1, c = fast_readchar();
  long long first = 0;
  while (c <= 32) c = fast_readchar();
  if (c == '-') s = -1, c = fast_readchar();
  while ('0' <= c && c <= '9')
    first = first * 10 + c - '0', c = fast_readchar();
  return first * s;
}
inline void readWord(char *s) {
  long long c = fast_readchar();
  while (c <= 32) c = fast_readchar();
  while (c > 32) *s++ = c, c = fast_readchar();
  *s = 0;
}
static long long write_pos = 0;
static char write_buf[buf_size];
inline void fast_writechar(long long first) {
  if (write_pos == buf_size)
    fwrite(write_buf, 1, buf_size, stdout), write_pos = 0;
  write_buf[write_pos++] = first;
}
inline void fast_flush() {
  if (write_pos) fwrite(write_buf, 1, write_pos, stdout), write_pos = 0;
}
inline void writeInt(long long first) {
  if (first < 0) fast_writechar('-'), first = -first;
  char s[24];
  long long n = 0;
  while (first || !n) s[n++] = '0' + first % 10, first /= 10;
  while (n--) fast_writechar(s[n]);
}
inline void writeWord(const char *s) {
  while (*s) fast_writechar(*s++);
}