#include<bits/stdc++.h>
using namespace std;
mt19937 rnd(51);
#define ll long long
#define pb push_back
#define ld long double
const int N = 2e5 + 10;
int pos[N];
struct SegTree {
vector<int> t;
SegTree(int n) {
t.resize(4 * n);
}
void update(int v, int l, int r, int pos, int val) {
if (l == r) {
t[v] += val;
return;
}
int m = (l + r) / 2;
if (pos <= m) {
update(2 * v, l, m, pos, val);
} else {
update(2 * v + 1, m + 1, r, pos, val);
}
t[v] = t[v * 2] + t[v * 2 + 1];
}
int get_ind(int v, int l, int r, int val) {
if (l == r) {
return l;
}
int m = (l + r) / 2;
if (t[v * 2] >= val) {
return get_ind(2 * v, l, m, val);
} else {
return get_ind(2 * v + 1, m + 1, r, val - t[v * 2]);
}
}
int get_sum(int v, int tl, int tr, int l, int r) {
if (l > r) return 0;
if (tl == l && tr == r) {
return t[v];
}
int tm = (tl + tr) / 2;
return get_sum(2 * v, tl, tm, l, min(r, tm)) + get_sum(2 * v + 1, tm + 1, tr, max(l, tm + 1), r);
}
} t(N);
set<array<int, 3>> st;
void add_seg(int val, int l, int r) {
st.insert({val, l, r});
t.update(1, 0, N - 1, val, (r - l + 1));
}
void del_seg(int val, int l, int r) {
st.erase({val, l, r});
t.update(1, 0, N - 1, val, -(r - l + 1));
}
int get_ind(int need) {
return pos[t.get_ind(1, 0, N - 1, need)];
}
signed main() {
#ifdef LOCAL
freopen("input.txt", "r", stdin);
#endif // LOCAL
ios_base::sync_with_stdio(0);
cin.tie(0);
int n, q;
cin >> n >> q;
vector<int> a(n), ans(q, -1), go(n, n);
vector<vector<pair<int,int>>> need(n);
int last = 0;
deque<int> qu;
for (int i = 0; i < n; i++) {
cin >> a[i];
pos[a[i]] = i;
if (a[i] > a[last]) {
add_seg(a[last], last, i - 1);
last = i;
}
}
for (int i = 0; i < n; i++) {
while (qu.size() > 0 && a[i] > a[qu.back()]) {
go[qu.back()] = i;
qu.pop_back();
}
qu.pb(i);
}
add_seg(a[last], last, n - 1);
for (int i = 0; i < q; i++) {
int t, ind;
cin >> t >> ind;
if (t == 0) {
ans[i] = a[ind - 1];
} else {
need[min(n - 1, t - 1)].pb({ind, i});
}
}
for (int i = 0; i < n; i++) {
int pos = get_ind(n / 2 + 1);
if (t.get_sum(1, 0, N - 1, 0,pos - 1) < n / 2) {
auto seg = *st.lower_bound({a[pos], 0, 0});
int ind = seg[2] - (t.get_sum(1, 0, N - 1, 0, a[pos]) - n / 2);
del_seg(seg[0], seg[1], seg[2]);
add_seg(seg[0], seg[1], ind);
int last = ind + 1;
while (go[last] <= seg[2]) {
add_seg(a[last], last, go[last] - 1);
last = go[last];
}
add_seg(a[last], last, seg[2]);
}
for (auto to : need[i]) {
int pos = get_ind(to.first);
auto seg = *st.lower_bound({a[pos], 0, 0});
ans[to.second] = a[seg[2] - (t.get_sum(1, 0, N - 1, 0, a[pos]) - to.first)];
}
}
for (int i = 0; i < q; i++) {
cout << ans[i] << '\n';
}
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
326 ms |
26404 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
613 ms |
46096 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
133 ms |
13512 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
326 ms |
26404 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
