#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
struct segtree {
int v;
int l, r, m;
segtree *lc = nullptr, *rc = nullptr;
segtree(int L, int R, vector<int> &u) {
l = L;
r = R;
m = (l + r) / 2;
if (l == r) {
v = u[m];
return;
}
lc = new segtree(l, m, u);
rc = new segtree(m+1, r, u);
v = lc->v + rc->v;
}
void point_set(int i, int k) {
if (l == i && i == r) {
v = k;
return;
}
if (i <= m) lc->point_set(i, k);
else rc->point_set(i, k);
v = lc->v + rc->v;
}
pii get_val(int i) {
if (l == r) return {m, i};
if (i < lc->v) return lc->get_val(i);
else return rc->get_val(i - lc->v);
}
void del() {
if (lc != nullptr) lc->del();
if (rc != nullptr) rc->del();
delete lc;
delete rc;
}
};
void solve() {
int n, q;
cin >> n >> q;
vector<int> a(n+1, n);
for (int i = 0; i < n; ++i) {
cin >> a[i];
--a[i];
}
vector<int> b(n+1);
for (int i = 0; i <= n; ++i) b[a[i]] = i;
vector<array<int, 3>> que(q);
for (int i = 0; i < q; ++i) {
cin >> que[i][0] >> que[i][1];
que[i][2] = i;
}
vector<int> nx(n+1);
stack<int> st;
for (int i : a) {
while (st.size() && i > st.top()) {
nx[st.top()] = i;
st.pop();
}
st.push(i);
}
while (st.size()) {
nx[st.top()] = n;
st.pop();
}
vector<int> len(n, 0);
for (int i = a[0]; i < n; i = nx[i]) len[i] = b[nx[i]] - b[i];
segtree seg(0, n-1, len);
sort(que.begin(), que.end());
vector<int> ans(q);
int j = 0;
for (int i = 0; true; ++i) {
while (j < q && que[j][0] == i) {
pii p = seg.get_val(que[j][1]-1);
ans[que[j][2]] = a[b[p.first] + p.second];
++j;
}
pii p = seg.get_val(n / 2);
if (p.second == 0) break;
for (int k = a[b[p.first] + p.second]; b[k] < b[p.first] + len[p.first]; k = nx[k]) {
len[k] = b[nx[k]] - b[k];
seg.point_set(k, len[k]);
}
len[p.first] = p.second;
seg.point_set(p.first, len[p.first]);
}
while (j < q) {
pii p = seg.get_val(que[j][1]-1);
ans[que[j][2]] = a[b[p.first] + p.second];
++j;
}
for (int i = 0; i < q; ++i) cout << ans[i]+1 << '\n';
seg.del();
}
int main() {
cin.tie(0) -> sync_with_stdio(0);
solve();
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
292 ms |
27492 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
341 ms |
57556 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
59 ms |
15188 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
292 ms |
27492 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |