#include <bits/stdc++.h>
using namespace std;
#define all(x) x.begin(), x.end()
#define tp3 tuple<int, int, int>
const int N = 1e6, L = 20, inf = INT_MAX;
int n, m, a[N], b[N], mxL[N], seg[N*4];
vector<int> lf[N];
vector<tp3> q[N];
bitset<N> ans;
void build(int p=1, int l=0, int r=n-1) {
if (l == r) {
seg[p] = (b[l] == -1 ? 0 : (a[l] + a[b[l]]));
return;
}
int mid = (l+r) >> 1;
build(p*2, l, mid);
build(p*2+1, mid+1, r);
seg[p] = max(seg[p*2], seg[p*2+1]);
}
void update(int x, int p=1, int l=0, int r=n-1) {
if (l == r) {
seg[p] = 0;
return;
}
int mid = (l+r) >> 1;
if (x <= mid) update(x, p*2, l, mid);
else update(x, p*2+1, mid+1, r);
seg[p] = max(seg[p*2], seg[p*2+1]);
}
int query(int x, int y, int p=1, int l=0, int r=n-1) {
if (x <= l && r <= y) {
return seg[p];
}
int mid = (l+r) >> 1;
if (y <= mid) {
return query(x, y, p*2, l, mid);
}
else if(mid+1 <= x) {
return query(x, y, p*2+1, mid+1, r);
}
else {
return max(query(x, y, p*2, l, mid), query(x, y, p*2+1, mid+1, r));
}
}
signed main() {
ios::sync_with_stdio(false); cin.tie(nullptr);
cin >> n >> m;
stack<pair<int, int>> st;
for (int i = 0; i < n; i++) {
cin >> a[i];
while (!st.empty() && st.top().first <= a[i]) st.pop();
b[i] = (st.empty() ? -1 : st.top().second);
lf[st.top().second].push_back(i);
st.push(make_pair(a[i], i));
}
for (int i = 0; i < m; i++) {
int l, r, k;
cin >> l >> r >> k;
l--; r--;
q[l].push_back(make_tuple(r, k, i));
}
for (int j = 1; j < L; j++) {
for (int i = 0; i < n; i++) {
st[j][i] = max(st[j-1][i], st[j-1][i + (1 << (j-1))]);
}
}
build();
for (int l = 0; l < n; l++) {
for (auto& [r, k, idx] : q[l]) {
ans[idx] = (query(l, r) <= k);
}
for (int& i : lf[l]) {
update(i);
}
}
for (int i = 0; i < m; i++) {
cout << ans[i] << "\n";
}
}
Compilation message
sortbooks.cpp: In function 'int main()':
sortbooks.cpp:81:11: error: no match for 'operator[]' (operand types are 'std::stack<std::pair<int, int> >' and 'int')
81 | st[j][i] = max(st[j-1][i], st[j-1][i + (1 << (j-1))]);
| ^
sortbooks.cpp:81:26: error: no match for 'operator[]' (operand types are 'std::stack<std::pair<int, int> >' and 'int')
81 | st[j][i] = max(st[j-1][i], st[j-1][i + (1 << (j-1))]);
| ^
sortbooks.cpp:81:38: error: no match for 'operator[]' (operand types are 'std::stack<std::pair<int, int> >' and 'int')
81 | st[j][i] = max(st[j-1][i], st[j-1][i + (1 << (j-1))]);
| ^
