oj.uz

Submission #967521

# Submission time Handle Problem Language Result Execution time Memory
967521 2024-04-22T10:09:38 Z marvinthang Abracadabra (CEOI22_abracadabra) C++17
100 / 100
 508 ms 48596 KB 
/*************************************
*    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]);
			right[p[i]] = min(r, nxt[i]);
			bit.update(p[i], right[p[i]] - 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");
      |  ^~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 212 ms 22608 KB Output is correct
2 Correct 228 ms 24660 KB Output is correct
3 Correct 210 ms 24084 KB Output is correct
4 Correct 173 ms 21944 KB Output is correct
5 Correct 191 ms 26192 KB Output is correct
6 Correct 186 ms 25940 KB Output is correct
7 Correct 196 ms 27196 KB Output is correct
8 Correct 179 ms 24400 KB Output is correct
9 Correct 185 ms 23600 KB Output is correct
10 Correct 183 ms 23312 KB Output is correct
11 Correct 180 ms 23764 KB Output is correct
12 Correct 174 ms 21024 KB Output is correct
13 Correct 194 ms 22516 KB Output is correct
14 Correct 197 ms 25436 KB Output is correct
15 Correct 191 ms 23176 KB Output is correct
16 Correct 0 ms 360 KB Output is correct
17 Correct 208 ms 21688 KB Output is correct
18 Correct 181 ms 21204 KB Output is correct
19 Correct 0 ms 344 KB Output is correct
20 Correct 0 ms 348 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 275 ms 35524 KB Output is correct
2 Correct 270 ms 41008 KB Output is correct
3 Correct 214 ms 34840 KB Output is correct
4 Correct 198 ms 34636 KB Output is correct
5 Correct 215 ms 35780 KB Output is correct
6 Correct 207 ms 33904 KB Output is correct
7 Correct 246 ms 41184 KB Output is correct
8 Correct 236 ms 40124 KB Output is correct
9 Correct 200 ms 35252 KB Output is correct
10 Correct 234 ms 37844 KB Output is correct
11 Correct 182 ms 32956 KB Output is correct
12 Correct 186 ms 34436 KB Output is correct
13 Correct 218 ms 37124 KB Output is correct
14 Correct 193 ms 35220 KB Output is correct
15 Correct 229 ms 38840 KB Output is correct
16 Correct 20 ms 10064 KB Output is correct
17 Correct 236 ms 35776 KB Output is correct
18 Correct 170 ms 30404 KB Output is correct
19 Correct 59 ms 15616 KB Output is correct
20 Correct 65 ms 16628 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 9172 KB Output is correct
2 Correct 47 ms 9264 KB Output is correct
3 Correct 47 ms 8928 KB Output is correct
4 Correct 35 ms 8528 KB Output is correct
5 Correct 41 ms 9372 KB Output is correct
6 Correct 36 ms 8516 KB Output is correct
7 Correct 39 ms 9188 KB Output is correct
8 Correct 37 ms 8608 KB Output is correct
9 Correct 40 ms 9088 KB Output is correct
10 Correct 34 ms 8056 KB Output is correct
11 Correct 44 ms 8564 KB Output is correct
12 Correct 32 ms 8284 KB Output is correct
13 Correct 33 ms 8284 KB Output is correct
14 Correct 33 ms 8536 KB Output is correct
15 Correct 32 ms 8272 KB Output is correct
16 Correct 10 ms 5264 KB Output is correct
17 Correct 44 ms 7740 KB Output is correct
18 Correct 33 ms 7716 KB Output is correct
19 Correct 0 ms 356 KB Output is correct
20 Correct 0 ms 348 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 212 ms 22608 KB Output is correct
2 Correct 228 ms 24660 KB Output is correct
3 Correct 210 ms 24084 KB Output is correct
4 Correct 173 ms 21944 KB Output is correct
5 Correct 191 ms 26192 KB Output is correct
6 Correct 186 ms 25940 KB Output is correct
7 Correct 196 ms 27196 KB Output is correct
8 Correct 179 ms 24400 KB Output is correct
9 Correct 185 ms 23600 KB Output is correct
10 Correct 183 ms 23312 KB Output is correct
11 Correct 180 ms 23764 KB Output is correct
12 Correct 174 ms 21024 KB Output is correct
13 Correct 194 ms 22516 KB Output is correct
14 Correct 197 ms 25436 KB Output is correct
15 Correct 191 ms 23176 KB Output is correct
16 Correct 0 ms 360 KB Output is correct
17 Correct 208 ms 21688 KB Output is correct
18 Correct 181 ms 21204 KB Output is correct
19 Correct 0 ms 344 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 275 ms 35524 KB Output is correct
22 Correct 270 ms 41008 KB Output is correct
23 Correct 214 ms 34840 KB Output is correct
24 Correct 198 ms 34636 KB Output is correct
25 Correct 215 ms 35780 KB Output is correct
26 Correct 207 ms 33904 KB Output is correct
27 Correct 246 ms 41184 KB Output is correct
28 Correct 236 ms 40124 KB Output is correct
29 Correct 200 ms 35252 KB Output is correct
30 Correct 234 ms 37844 KB Output is correct
31 Correct 182 ms 32956 KB Output is correct
32 Correct 186 ms 34436 KB Output is correct
33 Correct 218 ms 37124 KB Output is correct
34 Correct 193 ms 35220 KB Output is correct
35 Correct 229 ms 38840 KB Output is correct
36 Correct 20 ms 10064 KB Output is correct
37 Correct 236 ms 35776 KB Output is correct
38 Correct 170 ms 30404 KB Output is correct
39 Correct 59 ms 15616 KB Output is correct
40 Correct 65 ms 16628 KB Output is correct
41 Correct 46 ms 9172 KB Output is correct
42 Correct 47 ms 9264 KB Output is correct
43 Correct 47 ms 8928 KB Output is correct
44 Correct 35 ms 8528 KB Output is correct
45 Correct 41 ms 9372 KB Output is correct
46 Correct 36 ms 8516 KB Output is correct
47 Correct 39 ms 9188 KB Output is correct
48 Correct 37 ms 8608 KB Output is correct
49 Correct 40 ms 9088 KB Output is correct
50 Correct 34 ms 8056 KB Output is correct
51 Correct 44 ms 8564 KB Output is correct
52 Correct 32 ms 8284 KB Output is correct
53 Correct 33 ms 8284 KB Output is correct
54 Correct 33 ms 8536 KB Output is correct
55 Correct 32 ms 8272 KB Output is correct
56 Correct 10 ms 5264 KB Output is correct
57 Correct 44 ms 7740 KB Output is correct
58 Correct 33 ms 7716 KB Output is correct
59 Correct 0 ms 356 KB Output is correct
60 Correct 0 ms 348 KB Output is correct
61 Correct 508 ms 48596 KB Output is correct
62 Correct 446 ms 46568 KB Output is correct
63 Correct 422 ms 45160 KB Output is correct
64 Correct 318 ms 44764 KB Output is correct
65 Correct 349 ms 46804 KB Output is correct
66 Correct 332 ms 44720 KB Output is correct
67 Correct 312 ms 44344 KB Output is correct
68 Correct 307 ms 42516 KB Output is correct
69 Correct 335 ms 45028 KB Output is correct
70 Correct 288 ms 40720 KB Output is correct
71 Correct 272 ms 42320 KB Output is correct
72 Correct 283 ms 41208 KB Output is correct
73 Correct 262 ms 41552 KB Output is correct
74 Correct 284 ms 43696 KB Output is correct
75 Correct 284 ms 42424 KB Output is correct
76 Correct 20 ms 10072 KB Output is correct
77 Correct 334 ms 36088 KB Output is correct
78 Correct 223 ms 35492 KB Output is correct
79 Correct 0 ms 348 KB Output is correct
80 Correct 0 ms 348 KB Output is correct