이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
using namespace std;
const int maxn = 1e6, maxlog = 20;
int w[maxn], Log[maxn + 1], jump[maxn][maxlog];
struct SparseTable {
int n;
int st[maxn][maxlog];
SparseTable() {}
SparseTable(int _n) {
n = _n;
}
void build() {
for (int i = 0; i < n; ++i) {
st[i][0] = jump[i][0];
}
for (int j = 1; j <= Log[n]; ++j) {
for (int i = 0; i + (1 << j) - 1 < n; ++i) {
st[i][j] = max(st[i][j - 1], st[i + (1 << (j - 1))][j - 1]);
}
}
}
int getMax(int l, int r) {
int j = Log[r - l + 1];
return max(st[l][j], st[r - (1 << j) + 1][j]);
}
~SparseTable() {}
};
void solve() {
int n, m;
cin >> n >> m;
for (int i = 0; i < n; ++i) {
cin >> w[i];
for (int j = 0; j < maxlog; ++j) {
jump[i][j] = -1;
}
}
vector<int> stk;
for (int i = 0; i < n; ++i) {
while (!stk.empty() && w[i] >= w[stk.back()]) {
stk.pop_back();
}
if (!stk.empty()) {
jump[i][0] = stk.back();
for (int j = 1; j < maxlog && jump[jump[i][j - 1]][j - 1] != -1; ++j) {
jump[i][j] = jump[jump[i][j - 1]][j - 1];
}
}
stk.push_back(i);
}
SparseTable st(n);
st.build();
while (m--) {
int l, r, k;
cin >> l >> r >> k;
--l, --r;
int left = -1, right = r + 1;
while (right - left > 1) {
int mid = left + (right - left) / 2;
if (st.getMax(r - mid, r) >= l) {
right = mid;
} else {
left = mid;
}
}
r -= right;
// cerr << "r: " << r << '\n';
if (r <= l) {
cout << "1\n";
} else {
for (int j = maxlog - 1; j >= 0; --j) {
if (jump[r][j] != -1 && jump[jump[r][j]][0] >= l) {
r = jump[r][j];
}
}
if (w[r] + w[jump[r][0]] > k) {
cout << "0\n";
} else {
cout << "1\n";
}
}
}
}
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
Log[1] = 0;
for (int i = 2; i <= maxn; ++i) {
Log[i] = Log[i >> 1] + 1;
}
int T = 1;
// cin >> T;
while (T--) {
solve();
}
return 0;
}
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