답안 #94472

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
94472	2019-01-19T03:42:32 Z	wxh010910	커다란 상품 (IOI17_prize)	C++17	100 / 100	50 ms	2216 KB

prize

#include <bits/stdc++.h>
#include "prize.h"

using namespace std;

int find_best(int n) {
  vector<pair<int, int>> ans(n);
  unordered_map<int, set<int>> s;
  function<int(int, int)> solve = [&](int l, int r) {
    if (l > r) {
      return -1;
    }
    int mid = l + r >> 1;
    vector<int> a = ask(mid);
    ans[mid] = make_pair(a[0], a[1]);
    int sum = ans[mid].first + ans[mid].second;
    if (!sum) {
      return mid;
    }
    auto it = s[sum].insert(mid).first;
    if (it == s[sum].begin() || ans[*prev(it)].first != ans[mid].first) {
      int res = solve(l, mid - 1);
      if (res != -1) {
        return res;
      }
    }
    if (it == --s[sum].end() || ans[*next(it)].second != ans[mid].second) {
      int res = solve(mid + 1, r);
      if (res != -1) {
        return res;
      }
    }
    return -1;
  };
  return solve(0, n - 1);
}

Compilation message

prize.cpp: In lambda function:
prize.cpp:13:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     int mid = l + r >> 1;
               ~~^~~

Subtask #1

20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	1928 KB	Output is correct
2	Correct	3 ms	1848 KB	Output is correct
3	Correct	5 ms	1784 KB	Output is correct
4	Correct	3 ms	1960 KB	Output is correct
5	Correct	3 ms	1828 KB	Output is correct
6	Correct	3 ms	1784 KB	Output is correct
7	Correct	3 ms	1972 KB	Output is correct
8	Correct	3 ms	1912 KB	Output is correct
9	Correct	3 ms	1852 KB	Output is correct
10	Correct	3 ms	1788 KB	Output is correct

Subtask #2

80.0 / 80.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	1932 KB	Output is correct
2	Correct	3 ms	1948 KB	Output is correct
3	Correct	3 ms	2104 KB	Output is correct
4	Correct	3 ms	1960 KB	Output is correct
5	Correct	3 ms	1844 KB	Output is correct
6	Correct	4 ms	1784 KB	Output is correct
7	Correct	3 ms	1976 KB	Output is correct
8	Correct	3 ms	2024 KB	Output is correct
9	Correct	3 ms	1852 KB	Output is correct
10	Correct	3 ms	1912 KB	Output is correct
11	Correct	5 ms	1784 KB	Output is correct
12	Correct	3 ms	1988 KB	Output is correct
13	Correct	9 ms	1912 KB	Output is correct
14	Correct	4 ms	504 KB	Output is correct
15	Correct	9 ms	1980 KB	Output is correct
16	Correct	19 ms	2056 KB	Output is correct
17	Correct	3 ms	1784 KB	Output is correct
18	Correct	26 ms	2104 KB	Output is correct
19	Correct	3 ms	1928 KB	Output is correct
20	Correct	6 ms	1252 KB	Output is correct
21	Correct	19 ms	1976 KB	Output is correct
22	Correct	7 ms	1812 KB	Output is correct
23	Correct	3 ms	1832 KB	Output is correct
24	Correct	3 ms	1912 KB	Output is correct
25	Correct	12 ms	2072 KB	Output is correct
26	Correct	23 ms	2096 KB	Output is correct
27	Correct	3 ms	1908 KB	Output is correct
28	Correct	48 ms	2104 KB	Output is correct
29	Correct	24 ms	2116 KB	Output is correct
30	Correct	50 ms	2088 KB	Output is correct
31	Correct	3 ms	1844 KB	Output is correct
32	Correct	6 ms	1784 KB	Output is correct
33	Correct	2 ms	248 KB	Output is correct
34	Correct	18 ms	2040 KB	Output is correct
35	Correct	4 ms	1928 KB	Output is correct
36	Correct	7 ms	2000 KB	Output is correct
37	Correct	4 ms	1912 KB	Output is correct
38	Correct	3 ms	1784 KB	Output is correct
39	Correct	12 ms	2088 KB	Output is correct
40	Correct	40 ms	2104 KB	Output is correct
41	Correct	28 ms	1912 KB	Output is correct
42	Correct	24 ms	1960 KB	Output is correct
43	Correct	22 ms	2000 KB	Output is correct
44	Correct	20 ms	1912 KB	Output is correct
45	Correct	19 ms	1960 KB	Output is correct
46	Correct	3 ms	1784 KB	Output is correct
47	Correct	11 ms	2040 KB	Output is correct
48	Correct	39 ms	2040 KB	Output is correct
49	Correct	7 ms	1784 KB	Output is correct
50	Correct	33 ms	2024 KB	Output is correct
51	Correct	19 ms	2040 KB	Output is correct
52	Correct	4 ms	1912 KB	Output is correct
53	Correct	6 ms	1788 KB	Output is correct
54	Correct	20 ms	1912 KB	Output is correct
55	Correct	3 ms	1848 KB	Output is correct
56	Correct	42 ms	2088 KB	Output is correct
57	Correct	17 ms	2052 KB	Output is correct
58	Correct	33 ms	2028 KB	Output is correct
59	Correct	26 ms	2112 KB	Output is correct
60	Correct	21 ms	2040 KB	Output is correct
61	Correct	4 ms	1924 KB	Output is correct
62	Correct	3 ms	1896 KB	Output is correct
63	Correct	4 ms	1976 KB	Output is correct
64	Correct	4 ms	1840 KB	Output is correct
65	Correct	3 ms	1784 KB	Output is correct
66	Correct	3 ms	1784 KB	Output is correct
67	Correct	3 ms	1856 KB	Output is correct
68	Correct	4 ms	1840 KB	Output is correct
69	Correct	4 ms	1784 KB	Output is correct
70	Correct	3 ms	1788 KB	Output is correct
71	Correct	48 ms	2040 KB	Output is correct
72	Correct	8 ms	1836 KB	Output is correct
73	Correct	40 ms	2088 KB	Output is correct
74	Correct	44 ms	2080 KB	Output is correct
75	Correct	6 ms	1784 KB	Output is correct
76	Correct	36 ms	2044 KB	Output is correct
77	Correct	44 ms	2216 KB	Output is correct
78	Correct	5 ms	1976 KB	Output is correct
79	Correct	27 ms	1912 KB	Output is correct
80	Correct	23 ms	2024 KB	Output is correct
81	Correct	40 ms	2104 KB	Output is correct
82	Correct	42 ms	2100 KB	Output is correct
83	Correct	5 ms	1848 KB	Output is correct
84	Correct	39 ms	2044 KB	Output is correct
85	Correct	46 ms	2096 KB	Output is correct
86	Correct	10 ms	1912 KB	Output is correct
87	Correct	4 ms	1972 KB	Output is correct
88	Correct	10 ms	1912 KB	Output is correct
89	Correct	7 ms	1912 KB	Output is correct
90	Correct	4 ms	1784 KB	Output is correct
91	Correct	7 ms	1912 KB	Output is correct
92	Correct	3 ms	1784 KB	Output is correct
93	Correct	5 ms	1912 KB	Output is correct
94	Correct	6 ms	1912 KB	Output is correct
95	Correct	13 ms	1912 KB	Output is correct
96	Correct	4 ms	1904 KB	Output is correct
97	Correct	3 ms	1784 KB	Output is correct