oj.uz

Submission #548094

# Submission time Handle Problem Language Result Execution time Memory
548094 2022-04-12T11:33:47 Z jhwest2 The Big Prize (IOI17_prize) C++17
100 / 100
 46 ms 2728 KB 
#include "prize.h"
#include <bits/stdc++.h>
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")

#pragma optimize
using namespace std;

const int M = 2e5 + 10;
vector<int> r;
pair<int, int> A[M];
tuple<int, int, int, int> Q[M << 2];

inline pair<int, int> doAsk(int i) {
	if (A[i].first != -1) {
		return A[i];
	}
	r = ask(i);
	return A[i] = { r[0], r[1] };
}


int find_best(int n) {
	for (int i = 0; i < n; i++) {
		A[i].first = -1;
	}
	vector<int> I(n), J;
	for (int i = 0; i < n; i++) {
		I[i] = i;
	}
	while (I.size() != 1) {
		int x = 0, p = 0;
		Q[p++] = { 0, 0, 0, (int)I.size() - 1 };

		for (int j = 0; j < min((int)I.size(), (int)sqrt(I.size()) + 26); j++) {
			auto [l, r, lo, hi] = Q[--p];
			auto [a, b] = doAsk(I[lo + hi >> 1]);
			x = max(x, a + b);

			Q[p++] = { 0, 0, lo, lo + hi >> 1 };
			Q[p++] = { 0, 0, 1 + (lo + hi >> 1), hi };
		}
		p = 0;
		Q[p++] = { 0, 0, 0, (int)I.size() - 1 };

		while (p != 0) {
			auto [l, r, lo, hi] = Q[--p];

			if (lo == hi) {
				J.push_back(I[lo]);
				continue;
			}
			int m = lo + hi >> 1;
			auto [vl, vr] = doAsk(I[m]);

			int c = 0, off = 0, ll = m, rr = m;
			while (vl + vr != x) {
				J.push_back(I[m + off]);
				c += 1;
				if (off <= 0) {
					off = -off + 1;
					rr = m + off;
				}
				else {
					off = -off;
					ll = m + off;
				}

				if (m + off < lo || m + off > hi) {
					break;
				}
				auto [nl, nr] = doAsk(I[m + off]);
				vl = nl; vr = nr;
			}
			if (m + off < lo || m + off > hi) {
				continue;
			}

			if (off <= 0) {
				if (l + vr != x) Q[p++] = { l, vr, lo, m + off };
				if (vl + c + r != x) Q[p++] = { vl + c, r, m - off + 1, hi };
			}
			else {
				if (l + vr + c != x) Q[p++] = { l, vr + c, lo, m - off };
				if (vl + r != x) Q[p++] = { vl, r, m + off, hi };
			}
		}
		I = J; J.clear();
		sort(I.begin(), I.end());
	}
	return I[0];
}

Compilation message

prize.cpp:7: warning: ignoring '#pragma optimize ' [-Wunknown-pragmas]
    7 | #pragma optimize
      | 
prize.cpp: In function 'int find_best(int)':
prize.cpp:38:29: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   38 |    auto [a, b] = doAsk(I[lo + hi >> 1]);
      |                          ~~~^~~~
prize.cpp:41:28: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   41 |    Q[p++] = { 0, 0, lo, lo + hi >> 1 };
      |                         ~~~^~~~
prize.cpp:42:29: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   42 |    Q[p++] = { 0, 0, 1 + (lo + hi >> 1), hi };
      |                          ~~~^~~~
prize.cpp:54:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   54 |    int m = lo + hi >> 1;
      |            ~~~^~~~
prize.cpp:57:24: warning: variable 'll' set but not used [-Wunused-but-set-variable]
   57 |    int c = 0, off = 0, ll = m, rr = m;
      |                        ^~
prize.cpp:57:32: warning: variable 'rr' set but not used [-Wunused-but-set-variable]
   57 |    int c = 0, off = 0, ll = m, rr = m;
      |                                ^~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2608 KB Output is correct
2 Correct 2 ms 2596 KB Output is correct
3 Correct 2 ms 2604 KB Output is correct
4 Correct 2 ms 2640 KB Output is correct
5 Correct 2 ms 2652 KB Output is correct
6 Correct 3 ms 2640 KB Output is correct
7 Correct 2 ms 2648 KB Output is correct
8 Correct 2 ms 2596 KB Output is correct
9 Correct 2 ms 2608 KB Output is correct
10 Correct 2 ms 2640 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2656 KB Output is correct
2 Correct 3 ms 2608 KB Output is correct
3 Correct 3 ms 2640 KB Output is correct
4 Correct 2 ms 2640 KB Output is correct
5 Correct 2 ms 2584 KB Output is correct
6 Correct 2 ms 2596 KB Output is correct
7 Correct 2 ms 2648 KB Output is correct
8 Correct 2 ms 2600 KB Output is correct
9 Correct 2 ms 2604 KB Output is correct
10 Correct 2 ms 2612 KB Output is correct
11 Correct 6 ms 2592 KB Output is correct
12 Correct 6 ms 2640 KB Output is correct
13 Correct 3 ms 2648 KB Output is correct
14 Correct 12 ms 464 KB Output is correct
15 Correct 35 ms 2656 KB Output is correct
16 Correct 38 ms 2660 KB Output is correct
17 Correct 29 ms 2640 KB Output is correct
18 Correct 37 ms 2596 KB Output is correct
19 Correct 39 ms 2656 KB Output is correct
20 Correct 22 ms 1448 KB Output is correct
21 Correct 39 ms 2640 KB Output is correct
22 Correct 29 ms 2604 KB Output is correct
23 Correct 3 ms 2612 KB Output is correct
24 Correct 5 ms 2632 KB Output is correct
25 Correct 31 ms 2672 KB Output is correct
26 Correct 30 ms 2596 KB Output is correct
27 Correct 2 ms 2632 KB Output is correct
28 Correct 29 ms 2600 KB Output is correct
29 Correct 31 ms 2596 KB Output is correct
30 Correct 19 ms 2660 KB Output is correct
31 Correct 31 ms 2632 KB Output is correct
32 Correct 5 ms 2664 KB Output is correct
33 Correct 1 ms 208 KB Output is correct
34 Correct 34 ms 2592 KB Output is correct
35 Correct 3 ms 2640 KB Output is correct
36 Correct 35 ms 2656 KB Output is correct
37 Correct 5 ms 2604 KB Output is correct
38 Correct 3 ms 2608 KB Output is correct
39 Correct 42 ms 2640 KB Output is correct
40 Correct 24 ms 2584 KB Output is correct
41 Correct 35 ms 2656 KB Output is correct
42 Correct 34 ms 2640 KB Output is correct
43 Correct 26 ms 2632 KB Output is correct
44 Correct 17 ms 2672 KB Output is correct
45 Correct 32 ms 2600 KB Output is correct
46 Correct 37 ms 2660 KB Output is correct
47 Correct 32 ms 2656 KB Output is correct
48 Correct 34 ms 2656 KB Output is correct
49 Correct 36 ms 2728 KB Output is correct
50 Correct 38 ms 2640 KB Output is correct
51 Correct 34 ms 2640 KB Output is correct
52 Correct 31 ms 2656 KB Output is correct
53 Correct 2 ms 2672 KB Output is correct
54 Correct 26 ms 2644 KB Output is correct
55 Correct 33 ms 2672 KB Output is correct
56 Correct 36 ms 2660 KB Output is correct
57 Correct 33 ms 2656 KB Output is correct
58 Correct 34 ms 2652 KB Output is correct
59 Correct 37 ms 2604 KB Output is correct
60 Correct 46 ms 2640 KB Output is correct
61 Correct 3 ms 2640 KB Output is correct
62 Correct 2 ms 2664 KB Output is correct
63 Correct 2 ms 2668 KB Output is correct
64 Correct 2 ms 2600 KB Output is correct
65 Correct 2 ms 2632 KB Output is correct
66 Correct 6 ms 2600 KB Output is correct
67 Correct 5 ms 2640 KB Output is correct
68 Correct 5 ms 2604 KB Output is correct
69 Correct 5 ms 2600 KB Output is correct
70 Correct 4 ms 2676 KB Output is correct
71 Correct 43 ms 2640 KB Output is correct
72 Correct 5 ms 2640 KB Output is correct
73 Correct 38 ms 2640 KB Output is correct
74 Correct 40 ms 2672 KB Output is correct
75 Correct 2 ms 2672 KB Output is correct
76 Correct 35 ms 2640 KB Output is correct
77 Correct 37 ms 2640 KB Output is correct
78 Correct 5 ms 2672 KB Output is correct
79 Correct 16 ms 2660 KB Output is correct
80 Correct 33 ms 2668 KB Output is correct
81 Correct 34 ms 2640 KB Output is correct
82 Correct 35 ms 2640 KB Output is correct
83 Correct 2 ms 2640 KB Output is correct
84 Correct 36 ms 2604 KB Output is correct
85 Correct 31 ms 2604 KB Output is correct
86 Correct 6 ms 2640 KB Output is correct
87 Correct 3 ms 2640 KB Output is correct
88 Correct 4 ms 2676 KB Output is correct
89 Correct 6 ms 2604 KB Output is correct
90 Correct 3 ms 2640 KB Output is correct
91 Correct 5 ms 2640 KB Output is correct
92 Correct 6 ms 2640 KB Output is correct
93 Correct 5 ms 2668 KB Output is correct
94 Correct 4 ms 2640 KB Output is correct
95 Correct 4 ms 2640 KB Output is correct
96 Correct 4 ms 2640 KB Output is correct
97 Correct 2 ms 2640 KB Output is correct