/*************************************
* author: marvinthang *
* created: 22.04.2024 16:32:37 *
*************************************/
#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define left ___left
#define right ___right
#define TIME (1.0 * clock() / CLOCKS_PER_SEC)
#define MASK(i) (1LL << (i))
#define BIT(x, i) ((x) >> (i) & 1)
#define __builtin_popcount __builtin_popcountll
#define ALL(v) (v).begin(), (v).end()
#define REP(i, n) for (int i = 0, _n = (n); i < _n; ++i)
#define REPD(i, n) for (int i = (n); i-- > 0; )
#define FOR(i, a, b) for (int i = (a), _b = (b); i < _b; ++i)
#define FORD(i, b, a) for (int i = (b), _a = (a); --i >= _a; )
#define FORE(i, a, b) for (int i = (a), _b = (b); i <= _b; ++i)
#define FORDE(i, b, a) for (int i = (b), _a = (a); i >= _a; --i)
#define scan_op(...) istream & operator >> (istream &in, __VA_ARGS__ &u)
#define print_op(...) ostream & operator << (ostream &out, const __VA_ARGS__ &u)
#ifdef LOCAL
#include "debug.h"
#else
#define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
#define DB(...) 23
#define db(...) 23
#define debug(...) 23
#endif
template <class U, class V> scan_op(pair <U, V>) { return in >> u.first >> u.second; }
template <class T> scan_op(vector <T>) { for (size_t i = 0; i < u.size(); ++i) in >> u[i]; return in; }
template <class U, class V> print_op(pair <U, V>) { return out << '(' << u.first << ", " << u.second << ')'; }
template <size_t i, class T> ostream & print_tuple_utils(ostream &out, const T &tup) { if constexpr(i == tuple_size<T>::value) return out << ")"; else return print_tuple_utils<i + 1, T>(out << (i ? ", " : "(") << get<i>(tup), tup); }
template <class ...U> print_op(tuple<U...>) { return print_tuple_utils<0, tuple<U...>>(out, u); }
template <class Con, class = decltype(begin(declval<Con>()))> typename enable_if <!is_same<Con, string>::value, ostream&>::type operator << (ostream &out, const Con &con) { out << '{'; for (__typeof(con.begin()) it = con.begin(); it != con.end(); ++it) out << (it == con.begin() ? "" : ", ") << *it; return out << '}'; }
// index from 0
template <class T> struct Fenwick {
int n; vector <T> bit;
Fenwick(int _n = 0): n(_n), bit(n + 1, 0) {}
void reset(void) { fill(bit.begin(), bit.end(), 0); }
void resize(int _n) { n = _n; bit.assign(n + 1, 0); }
void update(int i, T val) { for (++i; i <= n; i += i & -i) bit[i] += val; }
T get(int i) {
if (i < 0) return 0;
T res(0);
for (i = min(i + 1, n); i > 0; i &= i - 1) res += bit[i];
return res;
}
int upper_bound(T val) {
int res = 0;
for (int i = __lg(n); i >= 0; --i)
if ((res | MASK(i)) <= n && val >= bit[res | MASK(i)]) res |= MASK(i), val -= bit[res];
return res;
}
int lower_bound(T val) {
int res = 0;
for (int i = __lg(n); i >= 0; --i)
if ((res | MASK(i)) <= n && val > bit[res | MASK(i)]) res |= MASK(i), val -= bit[res];
return res;
}
};
// end of template
void process(void) {
int n, q; cin >> n >> q;
vector <int> p(n); cin >> p;
vector <int> nxt(n), left(n);
REPD(i, n) {
--p[i];
nxt[i] = i + 1;
while (nxt[i] < n && p[i] > p[nxt[i]]) nxt[i] = nxt[nxt[i]];
left[p[i]] = i;
}
priority_queue <int> pq;
vector <int> right(n);
Fenwick <int> bit(n);
for (int i = 0; i < n; i = nxt[i]) {
right[p[i]] = nxt[i];
bit.update(p[i], nxt[i] - i);
if (i < n / 2) pq.push(p[i]);
}
int sz = right[pq.top()];
vector <vector <pair <int, int>>> queriesAt(n + 1);
REP(i, q) {
int t, x; cin >> t >> x;
queriesAt[min(t, n)].emplace_back(x - 1, i);
}
vector <int> res(q);
REP(t, n + 1) {
for (auto [x, i]: queriesAt[t]) {
int k = bit.upper_bound(x);
res[i] = p[left[k] + x - bit.get(k - 1)];
}
int v = pq.top();
int r = right[v];
right[v] -= sz - n / 2;
bit.update(v, n / 2 - sz);
for (int i = right[v]; i < r; i = nxt[i]) {
pq.push(p[i]);
bit.update(p[i], nxt[i] - i);
right[p[i]] = nxt[i];
}
while (true) {
int v = pq.top();
int l = left[v];
int r = right[v];
if (sz - r + l >= n / 2) {
pq.pop();
sz -= r - l;
} else break;
}
}
REP(i, q) cout << res[i] + 1 << '\n';
}
int main(void) {
ios_base::sync_with_stdio(false); cin.tie(nullptr); // cout.tie(nullptr);
file("abracadabra");
// int t; cin >> t; while (t--)
process();
// cerr << "Time elapsed: " << TIME << " s.\n";
return (0^0);
}
Compilation message
Main.cpp: In function 'int main()':
Main.cpp:30:61: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
30 | #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:126:2: note: in expansion of macro 'file'
126 | file("abracadabra");
| ^~~~
Main.cpp:30:94: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
30 | #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:126:2: note: in expansion of macro 'file'
126 | file("abracadabra");
| ^~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
202 ms |
25684 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
230 ms |
39644 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
43 ms |
9680 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
202 ms |
25684 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
