#include <bits/stdc++.h>
using namespace std;
template <typename T>
struct invertible_binary_indexed_tree{
  int N;
  vector<T> BIT;
  function<T(T, T)> f;
  function<T(T)> inv;
  T E;
  invertible_binary_indexed_tree(){
  }
  invertible_binary_indexed_tree(int N, function<T(T, T)> f, function<T(T)> inv, T E): N(N), BIT(N + 1, E), f(f), inv(inv), E(E){
  }
  invertible_binary_indexed_tree(const vector<T> &A, function<T(T, T)> f, function<T(T)> inv, T E): N(A.size()), BIT(N + 1), f(f), inv(inv), E(E){
    for (int i = 0; i < N; i++){
      BIT[i + 1] = A[i];
    }
    for (int i = 1; i < N; i++){
      if (i + (i & -i) <= N){
        BIT[i + (i & -i)] = f(BIT[i + (i & -i)], BIT[i]);
      }
    }
  }
  void add(int i, T x){
    i++;
    while (i <= N){
      BIT[i] = f(BIT[i], x);
      i += i & -i;
    }
  }
  T sum(int i){
    T ans = E;
    while (i > 0){
      ans = f(ans, BIT[i]);
      i -= i & -i;
    }
    return ans;
  }
  T sum(int l, int r){
    return f(sum(r), inv(sum(l)));
  }
};
int main(){
  int N, Q;
  cin >> N >> Q;
  vector<long long> A(N);
  for (int i = 0; i < N; i++){
    cin >> A[i];
  }
  vector<int> L(Q), R(Q), X(Q);
  for (int i = 0; i < Q; i++){
    cin >> L[i] >> R[i] >> X[i];
    L[i]--;
  }
  invertible_binary_indexed_tree<long long> BIT1(A, plus<long long>(), negate<long long>(), 0);
  invertible_binary_indexed_tree<int> BIT2(N, plus<int>(), negate<int>(), 0);
  vector<tuple<int, int, int>> query;
  for (int i = 0; i < N; i++){
    query.push_back(make_tuple(A[i], 0, i));
  }
  for (int i = 0; i < Q; i++){
    query.push_back(make_tuple(X[i], 1, i));
  }
  sort(query.begin(), query.end(), greater<tuple<int, int, int>>());
  vector<long long> ans(Q);
  for (int i = 0; i < N + Q; i++){
    int t = get<1>(query[i]);
    int p = get<2>(query[i]);
    if (t == 0){
      BIT1.add(p, -A[p]);
      BIT2.add(p, 1);
    }
    if (t == 1){
      ans[p] = BIT1.sum(L[p], R[p]) + (long long) X[p] * BIT2.sum(L[p], R[p]);
    }
  }
  for (int i = 0; i < Q; i++){
    cout << ans[i] << endl;
  }
}