#include <bits/stdc++.h>
using namespace std;
const int nax=2e5+5;
vector<int> tab(nax);
int main(){
int n,q;
cin>>n>>q;
for (int i = 0; i < n; ++i)
{
cin>>tab[i];
}
vector<int> cur(n);
multiset<int> st;
int t;
vector<pair<int,int>> p(q);
for (int i = 0; i < q; ++i)
{
cin>>t;
cin>>p[i].first>>p[i].second;
p[i].first--;
p[i].second--;
}
long long pre[n];
for (int i = 0; i < n; ++i)
{
st.insert(tab[i]);
if(i>t) st.erase(st.find(tab[i-t-1]));
cur[i]=*--st.end();
pre[i]=cur[i];
if(i) pre[i]+=pre[i-1];
}
for (int i = 0; i < q; ++i)
{
cout << pre[p[i].second] - ( p[i].first>0 ? pre[p[i].first-1] : 0 )<<endl;
}
}
