답안 #592614

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
592614 2022-07-09T10:59:20 Z hltk 커다란 상품 (IOI17_prize) C++17
100 / 100
48 ms 1872 KB
#include "prize.h"

#include <bits/stdc++.h>

using namespace std;

using pii = pair<int, int>;

vector<pii> C;

pii m_ask(int i) {
	if (C[i].first != -1) return C[i];
	auto a = ask(i);
	return C[i] = {a[0], a[1]};
}


// 1, 2, 5, 26, 677

int find_best(int n) {
	C.assign(n, {-1, -1});
	if (n <= 7000) {
		for (int i = 0; i < n; ++i) {
			auto [a, b] = m_ask(i);
			if (a + b == 0) {
				return i;
			}
		}
		throw;
	}
	int B = n / 500;
	vector<int> pt;
	for (int i = 0; i < n; i += B) {
		pt.push_back(i);
	}
	int t = 0;
	for (int i : pt) {
		auto [a, b] = m_ask(i);
		t = max(t, a + b);
	}
	auto check = [&](int i) {
		auto [a, b] = m_ask(i);
		return a + b != t;
	};
	int jt = 0;
	for (int i = 0; i < n; ++i) {
		if (check(i)) {
			auto [a, b] = m_ask(i);
			if (a + b == 0) return i;
		} else {
			auto same = [&](int j) {
				return !check(j) && m_ask(j).second == m_ask(i).second;
			};
			int st = i, ed = n - 1;
			while (pt[jt] <= i) ++jt;
			for (int it = jt; it < (int) pt.size(); ++it) {
				int j = pt[it];
				if (same(j)) {
					st = j;
				} else {
					ed = j;
					break;
				}
			}
			while (st < ed) {
				int m = (st + ed) / 2;
				if (!same(m)) ed = m;
				else st = m + 1;
			}
			i = st - 1;
			assert(check(st));
		}
	}
}

Compilation message

prize.cpp: In function 'int find_best(int)':
prize.cpp:32:14: warning: control reaches end of non-void function [-Wreturn-type]
   32 |  vector<int> pt;
      |              ^~
# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 1872 KB Output is correct
2 Correct 6 ms 1872 KB Output is correct
3 Correct 3 ms 1824 KB Output is correct
4 Correct 5 ms 1824 KB Output is correct
5 Correct 5 ms 1824 KB Output is correct
6 Correct 4 ms 1824 KB Output is correct
7 Correct 4 ms 1872 KB Output is correct
8 Correct 4 ms 1872 KB Output is correct
9 Correct 4 ms 1824 KB Output is correct
10 Correct 7 ms 1872 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 1828 KB Output is correct
2 Correct 4 ms 1872 KB Output is correct
3 Correct 4 ms 1736 KB Output is correct
4 Correct 4 ms 1828 KB Output is correct
5 Correct 6 ms 1820 KB Output is correct
6 Correct 3 ms 1864 KB Output is correct
7 Correct 3 ms 1820 KB Output is correct
8 Correct 5 ms 1828 KB Output is correct
9 Correct 4 ms 1872 KB Output is correct
10 Correct 5 ms 1872 KB Output is correct
11 Correct 6 ms 1832 KB Output is correct
12 Correct 4 ms 1828 KB Output is correct
13 Correct 7 ms 1740 KB Output is correct
14 Correct 5 ms 464 KB Output is correct
15 Correct 5 ms 1824 KB Output is correct
16 Correct 27 ms 1816 KB Output is correct
17 Correct 5 ms 1872 KB Output is correct
18 Correct 31 ms 1872 KB Output is correct
19 Correct 7 ms 1804 KB Output is correct
20 Correct 12 ms 976 KB Output is correct
21 Correct 15 ms 1824 KB Output is correct
22 Correct 6 ms 1816 KB Output is correct
23 Correct 5 ms 1824 KB Output is correct
24 Correct 5 ms 1736 KB Output is correct
25 Correct 20 ms 1824 KB Output is correct
26 Correct 17 ms 1752 KB Output is correct
27 Correct 5 ms 1844 KB Output is correct
28 Correct 31 ms 1872 KB Output is correct
29 Correct 29 ms 1824 KB Output is correct
30 Correct 36 ms 1824 KB Output is correct
31 Correct 6 ms 1872 KB Output is correct
32 Correct 4 ms 1820 KB Output is correct
33 Correct 0 ms 208 KB Output is correct
34 Correct 15 ms 1816 KB Output is correct
35 Correct 5 ms 1832 KB Output is correct
36 Correct 7 ms 1820 KB Output is correct
37 Correct 6 ms 1828 KB Output is correct
38 Correct 6 ms 1832 KB Output is correct
39 Correct 10 ms 1828 KB Output is correct
40 Correct 33 ms 1872 KB Output is correct
41 Correct 13 ms 1868 KB Output is correct
42 Correct 30 ms 1872 KB Output is correct
43 Correct 22 ms 1808 KB Output is correct
44 Correct 18 ms 1828 KB Output is correct
45 Correct 19 ms 1872 KB Output is correct
46 Correct 5 ms 1828 KB Output is correct
47 Correct 23 ms 1872 KB Output is correct
48 Correct 30 ms 1872 KB Output is correct
49 Correct 4 ms 1872 KB Output is correct
50 Correct 26 ms 1744 KB Output is correct
51 Correct 16 ms 1820 KB Output is correct
52 Correct 5 ms 1828 KB Output is correct
53 Correct 3 ms 1864 KB Output is correct
54 Correct 19 ms 1872 KB Output is correct
55 Correct 4 ms 1872 KB Output is correct
56 Correct 41 ms 1812 KB Output is correct
57 Correct 32 ms 1804 KB Output is correct
58 Correct 24 ms 1828 KB Output is correct
59 Correct 28 ms 1872 KB Output is correct
60 Correct 24 ms 1820 KB Output is correct
61 Correct 5 ms 1872 KB Output is correct
62 Correct 4 ms 1872 KB Output is correct
63 Correct 5 ms 1872 KB Output is correct
64 Correct 5 ms 1736 KB Output is correct
65 Correct 6 ms 1872 KB Output is correct
66 Correct 10 ms 1828 KB Output is correct
67 Correct 3 ms 1820 KB Output is correct
68 Correct 5 ms 1832 KB Output is correct
69 Correct 11 ms 1828 KB Output is correct
70 Correct 5 ms 1824 KB Output is correct
71 Correct 21 ms 1872 KB Output is correct
72 Correct 10 ms 1872 KB Output is correct
73 Correct 44 ms 1872 KB Output is correct
74 Correct 32 ms 1872 KB Output is correct
75 Correct 8 ms 1872 KB Output is correct
76 Correct 26 ms 1872 KB Output is correct
77 Correct 20 ms 1828 KB Output is correct
78 Correct 7 ms 1872 KB Output is correct
79 Correct 10 ms 1828 KB Output is correct
80 Correct 28 ms 1872 KB Output is correct
81 Correct 42 ms 1872 KB Output is correct
82 Correct 35 ms 1872 KB Output is correct
83 Correct 6 ms 1828 KB Output is correct
84 Correct 31 ms 1872 KB Output is correct
85 Correct 48 ms 1872 KB Output is correct
86 Correct 36 ms 1872 KB Output is correct
87 Correct 7 ms 1872 KB Output is correct
88 Correct 26 ms 1872 KB Output is correct
89 Correct 35 ms 1872 KB Output is correct
90 Correct 7 ms 1872 KB Output is correct
91 Correct 28 ms 1872 KB Output is correct
92 Correct 30 ms 1872 KB Output is correct
93 Correct 39 ms 1872 KB Output is correct
94 Correct 35 ms 1872 KB Output is correct
95 Correct 36 ms 1872 KB Output is correct
96 Correct 33 ms 1872 KB Output is correct
97 Correct 32 ms 1872 KB Output is correct