제출 #445447

#제출 시각UTC-0아이디문제언어결과실행 시간메모리
4454472021-07-18 03:45:51SirCovidThe19thHedgehog Daniyar and Algorithms (IZhO19_sortbooks)C++14
100 / 100
2490 ms92408 KiB
#include <bits/stdc++.h>
using namespace std;
const int mx = 1e6+5;
int n, m, A[mx], bit[mx], ans[mx]; vector<array<int, 3>> R[mx];
void upd(int i, int val){
for (; i > 0; i -= i&(-i)) bit[i] = max(bit[i], val);
}
int query(int i){
int ret = 0;
for (; i <= n; i += i&(-i)) ret = max(ret, bit[i]);
return ret;
}
int main(){
ios_base::sync_with_stdio(0); cin.tie(0);
cin >> n >> m;
for (int i = 1; i <= n; i++) cin >> A[i];
for (int i = 1; i <= m; i++){
int l, r, k; cin >> l >> r >> k;
R[r].push_back({l, k, i});
}stack<int> stk;
for (int i = 1; i <= n; i++){
while (!stk.empty() and A[stk.top()] <= A[i]) stk.pop();
if (!stk.empty()) upd(stk.top(), A[stk.top()]+A[i]);
for (auto x : R[i]) ans[x[2]] = (query(x[0]) <= x[1]);
stk.push(i);
}for (int i = 1; i <= m; i++) cout<<ans[i]<<endl;
 
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