#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return true; } return false; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return true; } return false; }
#define vi vector<int>
#define vl vector<ll>
#define vii vector<pair<int,int>>
#define vll vector<pair<ll,ll>>
#define vvi vector<vector<int>>
#define vvl vector<vector<ll>>
#define vvii vector<vector<pair<int,int>>>
#define vvll vector<vector<pair<ll,ll>>>
#define vst vector<string>
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pb push_back
#define all(x) (x).begin(),(x).end()
#define mkunique(x) sort(all(x));(x).erase(unique(all(x)),(x).end())
#define fi first
#define se second
#define mp make_pair
#define si(x) int(x.size())
const int mod=998244353,MAX=300005,INF=15<<26;

//2d point update rectangle sum

// https://kopricky.github.io/code/SegmentTrees/rangetree_pointupdate.html

template<typename T> class fenwick_tree {
private:
    int n;
    vector<T> node;
    vector<T> def;
public:
    void update(int k, const T a)
    {
        k++;
        T ad = a - def[k-1];
        def[k-1] = a;
        
        while (k <= n) {
            node[k-1] += ad;
            k += k & -k;
        }
    }
    void init(const vector<T>& v){
        n = si(v);
        def = vector<T>(n);
        node = def;
        for(int i = 0; i < n; i++){
            update(i, v[i]);
        }
    }
    T query(int a, int b)
    {
        T res = 0;
        while(a > 0){
            res -= node[a-1];
            a -= a & -a;
        }
        while(b > 0){
            res += node[b-1];
            b -= b & -b;
        }
        return res;
    }
};

//座標の型, 値の型
template<typename CandidateType, typename ValueType> class RangeTree
{
public:
    static_assert(std::is_integral<CandidateType>::value, "Integral required.");
private:
    using CT = CandidateType;
    using VT = ValueType;
    using pcc = pair<CT, CT>;
    using pci = pair<CT, int>;
    int n, sz;
    vector<fenwick_tree<VT> > bit;
    // y座標, x座標
    vector<vector<pcc> > yx;
    // y座標, x座標
    vector<pcc> sorted;
    void update_(int id, const CT x, const CT y, const VT val) {
        id += n-1;
        const int yid = lower_bound(all(yx[id]), pcc(y, x)) - yx[id].begin();
        bit[id].update(yid, val);
        while(id > 0){
            id = (id - 1) / 2;
            const int yid = lower_bound(all(yx[id]), pcc(y, x)) - yx[id].begin();
            bit[id].update(yid, val);
        }
    }
    VT query(const int lxid, const int rxid, const CT ly, const CT ry, const int k, const int l, const int r) {
        if(r <= lxid || rxid <= l) return 0;
        if(lxid <= l && r <= rxid){
            const int lyid = lower_bound(all(yx[k]), pcc(ly, numeric_limits<CT>::min())) - yx[k].begin();
            const int ryid = upper_bound(all(yx[k]), pcc(ry, numeric_limits<CT>::min())) - yx[k].begin();
            return (lyid >= ryid) ? 0 : bit[k].query(lyid, ryid);
        }else{
            return query(lxid, rxid, ly, ry, 2*k+1, l, (l+r)/2) + query(lxid, rxid, ly, ry, 2*k+2, (l+r)/2, r);
        }
    }
public:
    // 座標, 点の値
    RangeTree(const vector<pcc>& cand, const vector<VT>& val) : n(1), sz((int)cand.size()), sorted(sz){
        while(n < sz) n *= 2;
        for(int i = 0; i < sz; ++i){
            sorted[i] = {cand[i].first, i};
        }
        sort(all(sorted), [&](const pcc& a, const pcc& b){
            return (a.first == b.first) ? (cand[a.second].second < cand[b.second].second) : (a.first < b.first);
        });
        yx.resize(2*n-1), bit.resize(2*n-1);
        for(int i = 0; i < sz; ++i){
            yx[i+n-1] = {{sorted[i].second, sorted[i].first}};
            vector<VT> arg = {val[sorted[i].second]};
            bit[i+n-1].init(arg);
            sorted[i].second = cand[sorted[i].second].second;
        }
        for(int i = n-2; i >= 0; --i){
            yx[i].resize((int)yx[2*i+1].size() + (int)yx[2*i+2].size());
            if(yx[i].empty()) continue;
            merge(all(yx[2*i+1]), all(yx[2*i+2]), yx[i].begin(), [&](const pcc& a, const pcc& b){
                return (cand[a.first].second == cand[b.first].second)
                ? (a.second < b.second) : (cand[a.first].second < cand[b.first].second);
            });
            vector<VT> arg((int)yx[i].size());
            for(int j = 0; j < (int)yx[i].size(); ++j){
                arg[j] = val[yx[i][j].first];
            }
            bit[i].init(arg);
        }
        for(int i = 0; i < 2*n-1; ++i){
            for(pcc& e : yx[i]){
                e.first = cand[e.first].second;
            }
        }
    }
    // 点 (x,y) の更新を行う
    void update(const CT x, const CT y, const VT val){
        const int id = lower_bound(all(sorted), pcc(x, y)) - sorted.begin();
        return update_(id, x, y, val);
    }
    // [lx,rx) × [ly,ry) の長方形領域のクエリに答える
    VT query(const CT lx, const CT ly, const CT rx, const CT ry){
        const int lxid = lower_bound(all(sorted), pcc(lx, numeric_limits<CT>::min())) - sorted.begin();
        const int rxid = upper_bound(all(sorted), pcc(rx, numeric_limits<CT>::min())) - sorted.begin();
        return (lxid >= rxid) ? 0 : query(lxid, rxid, ly, ry, 0, 0, n);
    }
};


int main(){
    
    std::ifstream in("text.txt");
    std::cin.rdbuf(in.rdbuf());
    cin.tie(0);
    ios::sync_with_stdio(false);
    
    ll N,Q;cin>>N>>Q;
    vll S(N);
    vl A(N),B(N);
    for(int i=0;i<N;i++){
        ll x;cin>>x;
        S[i]=mp(i,x);
        A[i]=1;
        B[i]=x;
    }
    RangeTree<ll,ll> CN(S,A),SUM(S,B);
    
    vl rui(N+1);
    for(int i=0;i<N;i++){
        rui[i+1]=rui[i]+B[i];
    }
    
    ll M=10000000003LL;
    
    while(Q--){
        ll l,r,x;cin>>l>>r>>x;l--;
        ll ans=0;
        ll a=CN.query(l,0,r,x);
        ll b=SUM.query(l,0,r,x);
        
        ans+=a*x;
        ans-=b;
        
        a=r-l-a;
        b=rui[r]-rui[l]-b;
        
        ans-=a*x;
        ans+=b;
        
        cout<<ans<<"\n";
    }
}