#include "bits/stdc++.h"
using namespace std;
#define for_(i, s, e) for (int i = s; i < (int) e; i++)
#define for__(i, s, e) for (ll i = s; i < e; i++)
typedef long long ll;
typedef vector<int> vi;
typedef array<int, 2> ii;
// #define endl '\n'
const ll INF = 1e15;
struct Node {
ll ans = -INF, mn = INF;
};
class SegmentTree {
public:
vector<Node> tree; int n;
vector<ll> lazy;
Node merge(Node &a, Node &b) {
Node ans;
ans.ans = max(a.ans, b.ans);
ans.mn = min(a.mn, b.mn);
return ans;
}
void push(int &p, int &c1, int &c2) {
if (lazy[p] != -INF) {
lazy[c1] = max(lazy[c1], lazy[p]);
lazy[c2] = max(lazy[c2], lazy[p]);
tree[c1].ans = max(tree[c1].ans, lazy[c1]-tree[c1].mn);
tree[c2].ans = max(tree[c2].ans, lazy[c2]-tree[c2].mn);
lazy[p] = -INF;
}
}
void updateMin(int i, ll val, int l, int r, int p) {
if (l > i or r < i) return;
if (l == r) {
tree[p] = {-INF, val};
return;
}
int mid = (l + r) / 2;
int c1 = 2*p+1, c2 = 2*p+2;
push(p, c1, c2);
updateMin(i, val, l, mid, c1); updateMin(i, val, mid+1, r, c2);
tree[p] = merge(tree[c1], tree[c2]);
}
void updateRangeMax(int i, int j, ll val, int l, int r, int p) {
if (r < i or l > j) return;
if (l >= i and r <= j) {
lazy[p] = max(lazy[p], val);
tree[p].ans = max(tree[p].ans, lazy[p]-tree[p].mn);
return;
}
int mid = (l + r) / 2;
int c1 = 2*p+1, c2 = 2*p+2;
push(p, c1, c2);
updateRangeMax(i, j, val, l, mid, c1); updateRangeMax(i, j, val, mid+1, r, c2);
tree[p] = merge(tree[c1], tree[c2]);
}
ll ans(int i, int j, int l, int r, int p) {
if (l > j or r < i) return -INF;
if (l >= i and r <= j) return tree[p].ans;
int mid = (l + r) / 2;
int c1 = 2*p+1, c2 = 2*p+2;
push(p, c1, c2);
return max(ans(i, j, l, mid, c1), ans(i, j, mid+1, r, c2));
}
SegmentTree(int N) {
n = N;
tree.resize(4*n); lazy.resize(4*n, -INF);
}
};
int n, q;
vector<array<int, 3>> nums; // {height, a, b}
vector<ii> qrs;
vector<ll> ans;
void solve() {
SegmentTree tree(n);
vector<vector<array<int, 2>>> qrLeft(n);
for_(i, 0, q) qrLeft[qrs[i][1]].push_back({qrs[i][0], i});
vector<vi> enter(n), bye(n);
for_(i, 0, n) {
if (i+nums[i][1] < n) enter[i+nums[i][1]].push_back(i);
bye[min(i+nums[i][2], n-1)].push_back(i);
}
for_(i, 0, n) {
for (auto &e: enter[i]) tree.updateMin(e, nums[e][0], 0, n-1, 0);
if (i-nums[i][1] >= 0) tree.updateRangeMax(max(i-nums[i][2], 0), i-nums[i][1], nums[i][0], 0, n-1, 0);
for (auto &l: qrLeft[i]) ans[l[1]] = max(ans[l[1]], tree.ans(l[0], i, 0, n-1, 0));
for (auto &e: bye[i]) tree.updateMin(e, INF, 0, n-1, 0);
}
}
int main() {
#ifdef mlocal
freopen("test.in", "r", stdin);
#endif
ios_base::sync_with_stdio(false);
cin.tie(0);
cin >> n;
nums.resize(n);
for_(i, 0, n) cin >> nums[i][0] >> nums[i][1] >> nums[i][2];
cin >> q;
qrs.resize(q); ans.resize(q, -1);
for_(i, 0, q) {
cin >> qrs[i][0] >> qrs[i][1];
qrs[i][0] -= 1; qrs[i][1] -= 1;
}
solve();
reverse(nums.begin(), nums.end());
for_(i, 0, q) {
qrs[i][0] = n-1-qrs[i][0];
qrs[i][1] = n-1-qrs[i][1];
swap(qrs[i][0], qrs[i][1]);
}
solve();
for (auto i: ans) cout << i << endl;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
364 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
364 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
581 ms |
36444 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
364 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
