#include <bits/stdc++.h>
using namespace std;
const long long MAXN = 5e5 + 5;
const long long MOD = 998244353;
long long res = 1;
vector<pair<long long, long long>> v1[MAXN];
long long pref[MAXN];
vector<pair<long long, long long>> v2[MAXN];
long long dp[MAXN];
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  long long n, m, k;
  cin >> n >> k >> m;
  for (long long i = 1; i <= m; i++) {
    long long l, r, x;
    cin >> l >> r >> x;
    v1[l].push_back(make_pair(r, x));
    v2[r + 1].push_back(make_pair(l, x));
  }
  for (long long bit = 0; bit < k; bit++) {
    long long val = (1LL << bit);
    long long cnt = 0;
    long long maxr = 0;
    for (long long i = 1; i <= n + 1; i++) {
      dp[i] = pref[i] = 0;
    }
    dp[0] = 1;
    pref[0] = 1;
    for (long long i = 1; i <= n + 1; i++) {
      pref[i] = pref[i - 1];
      for (auto x : v1[i]) {
        if ((x.second & val)) {
          cnt++;
        }
      }
      for (auto x : v2[i]) {
        if ((x.second & val)) {
          cnt--;
        } else {
          maxr = max(maxr, x.first);
        }
      }
      if (cnt == 0) {
        dp[i] = pref[i - 1] - pref[maxr - 1];
        dp[i] += MOD;
        dp[i] %= MOD;
      }
      pref[i] += dp[i];
      pref[i] %= MOD;
    }
    res = 1LL * res * dp[n + 1];
    res %= MOD;
  }
  cout << res << "\n";
}
