#include <bits/stdc++.h>
using namespace std;
using ll=long long;
const ll ILL=2167167167167167167;
const int INF=2100000000;
#define rep(i,a,b) for (int i=(int)(a);i<(int)(b);i++)
#define all(p) p.begin(),p.end()
template<class T> using pq_ = priority_queue<T, vector<T>, greater<T>>;
template<class T> int LB(vector<T> &v,T a){return lower_bound(v.begin(),v.end(),a)-v.begin();}
template<class T> int UB(vector<T> &v,T a){return upper_bound(v.begin(),v.end(),a)-v.begin();}
template<class T> bool chmin(T &a,T b){if(b<a){a=b;return 1;}else return 0;}
template<class T> bool chmax(T &a,T b){if(a<b){a=b;return 1;}else return 0;}
template<class T> void So(vector<T> &v) {sort(v.begin(),v.end());}
template<class T> void Sore(vector<T> &v) {sort(v.begin(),v.end(),[](T x,T y){return x>y;});}
bool yneos(bool a,bool upp=false){if(a){cout<<(upp?"YES\n":"Yes\n");}else{cout<<(upp?"NO\n":"No\n");}return a;}
template<class T> void vec_out(vector<T> &p,int ty=0){
    if(ty==2){cout<<'{';for(int i=0;i<(int)p.size();i++){if(i){cout<<",";}cout<<'"'<<p[i]<<'"';}cout<<"}\n";}
    else{if(ty==1){cout<<p.size()<<"\n";}for(int i=0;i<(int)(p.size());i++){if(i) cout<<" ";cout<<p[i];}cout<<"\n";}}
template<class T> T vec_min(vector<T> &a){assert(!a.empty());T ans=a[0];for(auto &x:a) chmin(ans,x);return ans;}
template<class T> T vec_max(vector<T> &a){assert(!a.empty());T ans=a[0];for(auto &x:a) chmax(ans,x);return ans;}
template<class T> T vec_sum(vector<T> &a){T ans=T(0);for(auto &x:a) ans+=x;return ans;}
int pop_count(long long a){int res=0;while(a){res+=(int)(a&1),a>>=1;}return res;}
template<class T> T square(T a){return a * a;}

#include <atcoder/segtree>
int op(int a, int b){
    return a + b;
}
int e(){
    return 0;
}
int target;
bool f(int x){
    return x <= target;
}

void solve();
// DEAR MYSTERIES / TOMOO
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int t = 1;
    // cin >> t;
    rep(i, 0, t) solve();
}

void solve(){
    int N, Q;
    cin >> N >> Q;
    vector<int> A(N + Q), ind(N + Q), L(N + Q), R(N + Q);
    rep(i, 0, N){
        cin >> A[i];
        ind[i] = i;
    }
    rep(i, N, N + Q){
        cin >> ind[i] >> A[i] >> L[i] >> R[i];
        L[i]--;
    }
    atcoder::segtree<int, op, e> seg(vector<int>(N + Q, 1));
    for (int i = N + Q - 1; i >= 0; i--){
        target = ind[i];
        ind[i] = seg.max_right<f>(0);
        seg.set(ind[i], 0);
        // cout << "# " << ind[i] << "\n";
    }
    atcoder::segtree<int, op, e> seg_val(N + Q);

    auto g = [&](int ind) -> int {
        target = ind;
        return seg_val.prod(0, seg.max_right<f>(0));
    };
    rep(i, 0, N + Q){
        seg.set(ind[i], 1);
        seg_val.set(ind[i], A[i]);
        if (i >= N) cout << g(R[i]) - g(L[i]) << "\n";
    }
}