#line 1 "main.cpp"

/**
 * @title Template
 */

#include <iostream>
#include <algorithm>
#include <utility>
#include <numeric>
#include <vector>
#include <array>
#include <cassert>

#line 2 "/Users/kodamankod/Desktop/cpp_programming/Library/other/chmin_chmax.cpp"

template <class T, class U>
constexpr bool chmin(T &lhs, const U &rhs) {
  if (lhs > rhs) { lhs = rhs; return true; }
  return false;
}

template <class T, class U>
constexpr bool chmax(T &lhs, const U &rhs) {
  if (lhs < rhs) { lhs = rhs; return true; }
  return false;
}

/**
 * @title Chmin/Chmax
 */
#line 2 "/Users/kodamankod/Desktop/cpp_programming/Library/other/range.cpp"

#line 4 "/Users/kodamankod/Desktop/cpp_programming/Library/other/range.cpp"

class range {
public:
  class iterator {
  private:
    int64_t M_position;

  public:
    constexpr iterator(int64_t position) noexcept: M_position(position) { }
    constexpr void operator ++ () noexcept { ++M_position; }
    constexpr bool operator != (iterator other) const noexcept { return M_position != other.M_position; }
    constexpr int64_t operator * () const noexcept { return M_position; }
  };

  class reverse_iterator {
  private:
    int64_t M_position;
  
  public:
    constexpr reverse_iterator(int64_t position) noexcept: M_position(position) { }
    constexpr void operator ++ () noexcept { --M_position; }
    constexpr bool operator != (reverse_iterator other) const noexcept { return M_position != other.M_position; }
    constexpr int64_t operator * () const noexcept { return M_position; }
  };
  
private:
  const iterator M_first, M_last;

public:
  constexpr range(int64_t first, int64_t last) noexcept: M_first(first), M_last(std::max(first, last)) { }
  constexpr iterator begin() const noexcept { return M_first; }
  constexpr iterator end() const noexcept { return M_last; }
  constexpr reverse_iterator rbegin() const noexcept { return reverse_iterator(*M_last - 1); } 
  constexpr reverse_iterator rend() const noexcept { return reverse_iterator(*M_first - 1); } 
};

/**
 * @title Range
 */
#line 2 "/Users/kodamankod/Desktop/cpp_programming/Library/other/rev.cpp"

#include <type_traits>
#include <iterator>
#line 6 "/Users/kodamankod/Desktop/cpp_programming/Library/other/rev.cpp"

template <class T>
class rev_impl {
public:
  using iterator = decltype(std::rbegin(std::declval<T>()));

private:
  const iterator M_begin;
  const iterator M_end;

public:
  constexpr rev_impl(T &&cont) noexcept: M_begin(std::rbegin(cont)), M_end(std::rend(cont)) { }
  constexpr iterator begin() const noexcept { return M_begin; }
  constexpr iterator end() const noexcept { return M_end; }
};

template <class T>
constexpr decltype(auto) rev(T &&cont) {
  return rev_impl<T>(std::forward<T>(cont));
}

/**
 * @title Reverser
 */
#line 2 "/Users/kodamankod/Desktop/cpp_programming/Library/algebraic/modular.cpp"

#line 2 "/Users/kodamankod/Desktop/cpp_programming/Library/algebraic/ext_gcd.cpp"

#line 4 "/Users/kodamankod/Desktop/cpp_programming/Library/algebraic/ext_gcd.cpp"
#include <cstdint>

constexpr std::pair<int64_t, int64_t> ext_gcd(int64_t a, int64_t b) {
  if ((a %= b) == 0) return { b, 0 };
  int64_t s = b, t = (a < 0 ? a + b : a);
  int64_t m0 = 0, m1 = 1, tmp = 0;
  while (t > 0) {
    const auto u = s / t;
    s -= t * u; m0 -= m1 * u;
    tmp = s; s = t; t = tmp; tmp = m0; m0 = m1; m1 = tmp;
  }
  return { s, (m0 < 0 ? m0 + b / s : m0) };
}

/**
 * @title Extended GCD
 */
#line 4 "/Users/kodamankod/Desktop/cpp_programming/Library/algebraic/modular.cpp"

#line 8 "/Users/kodamankod/Desktop/cpp_programming/Library/algebraic/modular.cpp"
#include <type_traits>

template <class Modulus>
class modular {
public:
  using value_type = uint32_t;
  using cover_type = uint64_t;
 
  template <class T>
  static constexpr value_type normalize(T value_) noexcept {
    if (value_ < 0) {
      value_ = -value_;
      value_ %= Modulus::mod();
      if (value_ == 0) return 0;
      return Modulus::mod() - value_;
    }
    return value_ % Modulus::mod();
  }

private:
  value_type value;

  template <bool IsPrime, std::enable_if_t<IsPrime>* = nullptr>
  constexpr modular inverse_helper() const noexcept { return power(*this, Modulus::mod() - 2); }
  template <bool IsPrime, std::enable_if_t<!IsPrime>* = nullptr>
  constexpr modular inverse_helper() const noexcept {
    const auto tmp = ext_gcd(value, Modulus::mod());
    assert(tmp.first == 1);
    return modular(tmp.second);
  }

public:
  constexpr modular() noexcept : value(0) { }
  template <class T>
  explicit constexpr modular(T value_) noexcept : value(normalize(value_)) { }
  template <class T>
  explicit constexpr operator T() const noexcept { return static_cast<T>(value); }
 
  constexpr value_type get() const noexcept { return value; }
  constexpr value_type &extract() noexcept { return value; }
  constexpr modular operator - () const noexcept { return modular(Modulus::mod() - value); }
  constexpr modular operator ~ () const noexcept { return inverse(*this); }
 
  constexpr modular operator + (const modular &rhs) const noexcept { return modular(*this) += rhs; }
  constexpr modular& operator += (const modular &rhs) noexcept { 
    if ((value += rhs.value) >= Modulus::mod()) value -= Modulus::mod(); 
    return *this; 
  }
 
  constexpr modular operator - (const modular &rhs) const noexcept { return modular(*this) -= rhs; }
  constexpr modular& operator -= (const modular &rhs) noexcept { 
    if ((value += Modulus::mod() - rhs.value) >= Modulus::mod()) value -= Modulus::mod(); 
    return *this; 
  }
 
  constexpr modular operator * (const modular &rhs) const noexcept { return modular(*this) *= rhs; }
  constexpr modular& operator *= (const modular &rhs) noexcept { 
    value = (cover_type) value * rhs.value % Modulus::mod();
    return *this;
  }
 
  constexpr modular operator / (const modular &rhs) const noexcept { return modular(*this) /= rhs; }
  constexpr modular& operator /= (const modular &rhs) noexcept { return (*this) *= inverse(rhs); }
 
  constexpr bool zero() const noexcept { return value == 0; }
  constexpr bool operator == (const modular &rhs) const noexcept { return value == rhs.value; }
  constexpr bool operator != (const modular &rhs) const noexcept { return value != rhs.value; }
 
  friend std::ostream& operator << (std::ostream &stream, const modular &rhs) { return stream << rhs.value; }
  friend constexpr modular inverse(const modular &val) noexcept { return val.inverse_helper<Modulus::is_prime>(); }
  friend constexpr modular power(modular val, cover_type exp) noexcept { 
    modular res(1);
    for (; exp > 0; exp >>= 1, val *= val) if (exp & 1) res *= val;
    return res;
  }
 
};
 
template <uint32_t Mod, bool IsPrime = true>
struct static_modulus { 
  static constexpr uint32_t mod() noexcept { return Mod; } 
  static constexpr bool is_prime = IsPrime;
};

template <uint32_t Id = 0, bool IsPrime = false>
struct dynamic_modulus {
  static uint32_t &mod() noexcept { static uint32_t val = 0; return val; }
  static constexpr bool is_prime = IsPrime;
};

template <uint32_t Mod>
using mint32_t = modular<static_modulus<Mod>>;
using rmint32_t = modular<dynamic_modulus<>>;

/*
 * @title Modint
 */
#line 2 "/Users/kodamankod/Desktop/cpp_programming/Library/container/lazy_propagation_segment_tree.cpp"

#line 2 "/Users/kodamankod/Desktop/cpp_programming/Library/other/bit_operation.cpp"

#include <cstddef>
#line 5 "/Users/kodamankod/Desktop/cpp_programming/Library/other/bit_operation.cpp"

constexpr size_t bit_ppc(const uint64_t x) { return __builtin_popcountll(x); }
constexpr size_t bit_ctzr(const uint64_t x) { return x == 0 ? 64 : __builtin_ctzll(x); }
constexpr size_t bit_ctzl(const uint64_t x) { return x == 0 ? 64 : __builtin_clzll(x); }
constexpr size_t bit_width(const uint64_t x) { return 64 - bit_ctzl(x); }
constexpr uint64_t bit_msb(const uint64_t x) { return x == 0 ? 0 : uint64_t(1) << (bit_width(x) - 1); }
constexpr uint64_t bit_lsb(const uint64_t x) { return x & (-x); }
constexpr uint64_t bit_cover(const uint64_t x) { return x == 0 ? 0 : bit_msb(2 * x - 1); }

constexpr uint64_t bit_rev(uint64_t x) {
  x = ((x >> 1) & 0x5555555555555555) | ((x & 0x5555555555555555) << 1);
  x = ((x >> 2) & 0x3333333333333333) | ((x & 0x3333333333333333) << 2);
  x = ((x >> 4) & 0x0F0F0F0F0F0F0F0F) | ((x & 0x0F0F0F0F0F0F0F0F) << 4);
  x = ((x >> 8) & 0x00FF00FF00FF00FF) | ((x & 0x00FF00FF00FF00FF) << 8);
  x = ((x >> 16) & 0x0000FFFF0000FFFF) | ((x & 0x0000FFFF0000FFFF) << 16);
  x = (x >> 32) | (x << 32);
  return x;
}

/**
 * @title Bit Operations
 */
#line 2 "/Users/kodamankod/Desktop/cpp_programming/Library/other/monoid.cpp"

#include <type_traits>
#line 5 "/Users/kodamankod/Desktop/cpp_programming/Library/other/monoid.cpp"
#include <stdexcept>

template <class T, class = void>
class has_identity: public std::false_type { };

template <class T>
class has_identity<T, typename std::conditional<false, decltype(T::identity()), void>::type>: public std::true_type { };

template <class T>
constexpr typename std::enable_if<has_identity<T>::value, typename T::type>::type empty_exception() {
  return T::identity();
}
template <class T>
[[noreturn]] typename std::enable_if<!has_identity<T>::value, typename T::type>::type empty_exception() {
  throw std::runtime_error("type T has no identity");
}

template <class T, bool HasIdentity>
class fixed_monoid_impl: public T {
public:
  using type = typename T::type;

  static constexpr type convert(const type &value) { return value; }
  static constexpr type revert(const type &value) { return value; }

  template <class Mapping, class Value, class... Args>
  static constexpr void operate(Mapping &&func, Value &value, const type &op, Args&&... args) {
    value = func(value, op, std::forward<Args>(args)...);
  }
  template <class Constraint>
  static constexpr bool satisfies(Constraint &&func, const type &value) {
    return func(value);
  }
};

template <class T>
class fixed_monoid_impl<T, false> {
public:
  class type {
  public:
    typename T::type value;
    bool state;
  
    explicit constexpr type(): value(typename T::type { }), state(false) { }
    explicit constexpr type(const typename T::type &value): value(value), state(true) { }
  };

  static constexpr type convert(const typename T::type &value) { return type(value); }
  static constexpr typename T::type revert(const type &value) { 
    if (!value.state) throw std::runtime_error("attempted to revert identity to non-monoid"); 
    return value.value; 
  }

  static constexpr type identity() { return type(); }
  static constexpr type operation(const type &v1, const type &v2) {
    if (!v1.state) return v2;
    if (!v2.state) return v1;
    return type(T::operation(v1.value, v2.value));
  }

  template <class Mapping, class Value, class... Args>
  static constexpr void operate(Mapping &&func, Value &value, const type &op, Args&&... args) {
    if (!op.state) return;
    value = func(value, op.value, std::forward<Args>(args)...);
  }
  template <class Constraint>
  static constexpr bool satisfies(Constraint &&func, const type &value) {
    if (!value.state) return false;
    return func(value.value);
  }
};

template <class T>
using fixed_monoid = fixed_monoid_impl<T, has_identity<T>::value>;

/**
 * @title Monoid Utility
 */
#line 5 "/Users/kodamankod/Desktop/cpp_programming/Library/container/lazy_propagation_segment_tree.cpp"

#line 11 "/Users/kodamankod/Desktop/cpp_programming/Library/container/lazy_propagation_segment_tree.cpp"

template <class CombinedMonoid>
class lazy_propagation_segment_tree {
public:
  using structure       = CombinedMonoid;
  using value_monoid    = typename CombinedMonoid::value_structure;
  using operator_monoid = typename CombinedMonoid::operator_structure;
  using value_type      = typename CombinedMonoid::value_structure::type;
  using operator_type   = typename CombinedMonoid::operator_structure::type;
  using size_type       = size_t;

private:
  using fixed_operator_monoid = fixed_monoid<operator_monoid>;
  using fixed_operator_type   = typename fixed_operator_monoid::type;

  class node_type {
  public:
    value_type    value;
    fixed_operator_type lazy;
    node_type(
      const value_type    &value = value_monoid::identity(),
      const fixed_operator_type &lazy = fixed_operator_monoid::identity()
    ): value(value), lazy(lazy) { }
  };

  static void S_apply(node_type &node, const fixed_operator_type &op, const size_type length) {
    fixed_operator_monoid::operate(structure::operation, node.value, op, length);
    node.lazy = fixed_operator_monoid::operation(node.lazy, op);
  }

  void M_propagate(const size_type index, const size_type length) {
    S_apply(M_tree[index << 1 | 0], M_tree[index].lazy, length);
    S_apply(M_tree[index << 1 | 1], M_tree[index].lazy, length);
    M_tree[index].lazy = fixed_operator_monoid::identity();
  }
  void M_fix_change(const size_type index) {
    M_tree[index].value = 
      value_monoid::operation(M_tree[index << 1 | 0].value, M_tree[index << 1 | 1].value);
  }

  void M_pushdown(const size_type index) {
    const size_type lsb = bit_ctzr(index);
    for (size_type story = bit_width(index); story != lsb; --story) {
      M_propagate(index >> story, 1 << (story - 1));
    }
  }
  void M_pullup(size_type index) {
    index >>= bit_ctzr(index);
    while (index != 1) {
      index >>= 1;
      M_fix_change(index);
    }
  }

  std::vector<node_type> M_tree;

public:
  lazy_propagation_segment_tree() = default;
  explicit lazy_propagation_segment_tree(const size_type size) { initialize(size); }
  template <class InputIterator>
  explicit lazy_propagation_segment_tree(InputIterator first, InputIterator last) { construct(first, last); }

  void initialize(const size_type size) {
    clear();
    M_tree.assign(size << 1, node_type());
  }

  template <class InputIterator>
  void construct(InputIterator first, InputIterator last) {
    clear();
    const size_type size = std::distance(first, last);
    M_tree.reserve(size << 1);
    M_tree.assign(size, node_type());
    for (; first != last; ++first) {
      M_tree.emplace_back(*first, fixed_operator_monoid::identity());
    }
    for (size_type index = size - 1; index != 0; --index) {
      M_fix_change(index);
    }
  }

  value_type fold(size_type first, size_type last) {
    assert(first <= last);
    assert(last <= size());
    first += size();
    last  += size();
    M_pushdown(first);
    M_pushdown(last);
    value_type fold_l = value_monoid::identity();
    value_type fold_r = value_monoid::identity();
    while (first != last) {
      if (first & 1) {
        fold_l = value_monoid::operation(fold_l, M_tree[first].value);
        ++first;
      }
      if (last & 1) {
        --last;
        fold_r = value_monoid::operation(M_tree[last].value, fold_r);
      }
      first >>= 1;
      last  >>= 1;
    }
    return value_monoid::operation(fold_l, fold_r);
  }

  void operate(size_type first, size_type last, const operator_type &op_) {
    assert(first <= last);
    assert(last <= size());
    const auto op = fixed_operator_monoid::convert(op_);
    first += size();
    last  += size();
    M_pushdown(first);
    M_pushdown(last);
    const size_type first_c = first;
    const size_type last_c  = last;
    for (size_type story = 0; first != last; ++story) {
      if (first & 1) {
        S_apply(M_tree[first], op, 1 << story);
        ++first;
      }
      if (last & 1) {
        --last;
        S_apply(M_tree[last], op, 1 << story);
      }
      first >>= 1;
      last  >>= 1;
    }
    M_pullup(first_c);
    M_pullup(last_c);
  }

  void assign(size_type index, const value_type &val) {
    assert(index < size());
    index += size();
    for (size_type story = bit_width(index); story != 0; --story) {
      M_propagate(index >> story, 1 << (story - 1));
    }
    M_tree[index].value = val;
    M_tree[index].lazy  = fixed_operator_monoid::identity();
    while (index != 1) {
      index >>= 1;
      M_fix_change(index);
    }
  }

  template <bool ToRight = true, class Constraint, std::enable_if_t<ToRight>* = nullptr> 
  size_type satisfies(const size_type left, Constraint &&func) {
    assert(left <= size());
    if (func(value_monoid::identity())) return left;
    size_type first = left + size();
    size_type last = 2 * size();
    M_pushdown(first);
    M_pushdown(last);
    const size_type last_c = last;
    value_type fold = value_monoid::identity();
    const auto try_merge = [&](const size_type index) {
      value_type tmp = value_monoid::operation(fold, M_tree[index].value);
      if (func(tmp)) return true;
      fold = std::move(tmp);
      return false;
    };
    const auto subtree = [&](size_type index, size_type story) {
      while (index < size()) {
        M_propagate(index, 1 << (story - 1));
        index <<= 1;
        if (!try_merge(index)) ++index;
        --story;
      }
      return index - size() + 1;
    };
    size_type story = 0;
    while (first < last) {
      if (first & 1) {
        if (try_merge(first)) return subtree(first, story);
        ++first;
      }
      first >>= 1;
      last >>= 1;
      ++story;
    }
    while (story--) {
      last = last_c >> story;
      if (last & 1) {
        --last;
        if (try_merge(last)) return subtree(last, story);
      }
    }
    return size() + 1;
  }

  template <bool ToRight = true, class Constraint, std::enable_if_t<!ToRight>* = nullptr> 
  size_type satisfies(const size_type right, Constraint &&func) {
    assert(right <= size());
    if (func(value_monoid::identity())) return right;
    size_type first = size();
    size_type last = right + size();
    M_pushdown(first);
    M_pushdown(last);
    const size_type first_c = first;
    value_type fold = value_monoid::identity();
    const auto try_merge = [&](const size_type index) {
      value_type tmp = value_monoid::operation(M_tree[index].value, fold);
      if (func(tmp)) return true;
      fold = std::move(tmp);
      return false;
    };
    const auto subtree = [&](size_type index, size_type story) {
      while (index < size()) {
        M_propagate(index, 1 << (story - 1));
        index <<= 1;
        if (try_merge(index + 1)) ++index;
        --story;
      }
      return index - size();
    };
    size_type story = 0;
    while (first < last) {
      if (first & 1) ++first;
      if (last & 1) {
        --last;
        if (try_merge(last)) return subtree(last, story);
      }
      first >>= 1;
      last >>= 1;
      ++story;
    }
    const size_type cover = bit_cover(first_c);
    while (story--) {
      first = (cover >> story) - ((cover - first_c) >> story);
      if (first & 1) {
        if (try_merge(first)) return subtree(first, story);
      }
    }
    return size_type(-1);
  }

  void clear() {
    M_tree.clear();
    M_tree.shrink_to_fit();
  }
  size_type size() const { 
    return M_tree.size() >> 1;
  }
};

/**
 * @title Lazy Propagation Segment Tree
 */
#line 19 "main.cpp"

using i32 = int32_t;
using i64 = int64_t;
using u32 = uint32_t;
using u64 = uint64_t;

constexpr i32 inf32 = (i32(1) << 30) - 1;
constexpr i64 inf64 = (i64(1) << 62) - 1;

using m32 = mint32_t<998244353>;

struct lst_monoid {
  struct value_structure {
    using type = m32;
    static type identity() { return m32(0); }
    static type operation(const type& v1, const type& v2) { 
      return v1 + v2;
    }
  };
  struct operator_structure {
    using type = m32;
    static type identity() { return m32(1); }
    static type operation(const type& v1, const type& v2) { 
      return v1 * v2;
    }
  };
  static typename value_structure::type operation(
    const typename value_structure::type    &val,
    const typename operator_structure::type &op,
    const size_t = 1) {
    return val * op;
  }
};

int main() {
  i32 N, K;
  std::cin >> N >> K;
  std::vector<i32> P(N);
  for (auto &x: P) {
    std::cin >> x;
    --x;
  }
  m32 ans = m32(K) * m32(K - 1) / m32(4);
  lazy_propagation_segment_tree<lst_monoid> seg(N);
  const auto half = m32(1) / m32(2);
  const auto coeff = m32(K - 1) / m32(K);
  for (auto i: range(0, K)) {
    seg.assign(P[i], half);
  }
  for (auto i: range(K, N)) {
    seg.operate(0, N, coeff);
    ans += seg.fold(0, P[i]);
    ans += m32(N - P[i] - 1) - seg.fold(P[i] + 1, N);
    seg.assign(P[i], half);
  }
  std::cout << ans << '\n';
  return 0;
}
