#include <cassert>
#include <cmath>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <functional>
#include <iostream>
#include <limits>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <set>
#include <sstream>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>

using namespace std;

using Int = long long;

template <class T1, class T2> ostream &operator<<(ostream &os, const pair<T1, T2> &a) { return os << "(" << a.first << ", " << a.second << ")"; };
template <class T> ostream &operator<<(ostream &os, const vector<T> &as) { const int sz = as.size(); os << "["; for (int i = 0; i < sz; ++i) { if (i >= 256) { os << ", ..."; break; } if (i > 0) { os << ", "; } os << as[i]; } return os << "]"; }
template <class T> void pv(T a, T b) { for (T i = a; i != b; ++i) cerr << *i << " "; cerr << endl; }
template <class T> bool chmin(T &t, const T &f) { if (t > f) { t = f; return true; } return false; }
template <class T> bool chmax(T &t, const T &f) { if (t < f) { t = f; return true; } return false; }
#define COLOR(s) ("\x1b[" s "m")


int N, Q;
vector<int> A;
vector<int> L, R, X;


namespace brute {
vector<int> run() {
  vector<vector<int>> ques(N);
  vector<int> poss(N, 0);
  for (int i = 0; i < N; ++i) {
    ques[i].assign(A[i], 0);
  }
  const int limX = *max_element(X.begin(), X.end()) + 1;
  vector<int> now(limX, 0);
  vector<int> ans(Q, 0);
  for (int q = 0; q < Q; ++q) {
    for (int i = L[q]; i < R[q]; ++i) {
      --now[ques[i][poss[i]]];
      ++now[ques[i][poss[i]] = X[q]];
      if (++poss[i] == A[i]) poss[i] = 0;
    }
    for (int x = 1; x < limX; ++x) if (now[x]) {
      ++ans[q];
    }
  }
  return ans;
}
}  // brute


int main() {
  for (; ~scanf("%d%d", &N, &Q); ) {
    A.resize(N);
    for (int i = 0; i < N; ++i) {
      scanf("%d", &A[i]);
    }
    L.resize(Q);
    R.resize(Q);
    X.resize(Q);
    for (int q = 0; q < Q; ++q) {
      scanf("%d%d%d", &L[q], &R[q], &X[q]);
      --L[q];
    }
    
    vector<int> ans;
    ans = brute::run();
    for (int q = 0; q < Q; ++q) {
      printf("%d\n", ans[q]);
    }
  }
  return 0;
}