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Submission #217341

# Submission time Handle Problem Language Result Execution time Memory
217341 2020-03-29T12:45:51 Z Sorting Xoractive (IZhO19_xoractive) C++14
100 / 100
 7 ms 512 KB 
#include <bits/stdc++.h>
#include "interactive.h"

using namespace std;

const int kBits = 7;

map<int, bool> mp[kBits];

vector<int> guess(int n) {
	vector <int> ans(n);
	ans[0] = ask(1);

	for(int i = 0; i < 7; ++i){
		vector<int> v;
		for(int j = 2; j <= n; ++j){
			if((1 << i) & j)
				v.push_back(j);
		}

		if(v.empty())
			continue;

		vector<int> pairs_without = get_pairwise_xor(v);
		pairs_without.insert(pairs_without.begin(), 0);
		v.push_back(1);
		vector<int> pairs_with = get_pairwise_xor(v);

		for(int idx_with = 0, idx_without = 0; idx_with < pairs_with.size(); ++idx_with){
			if(idx_without < pairs_without.size() && pairs_with[idx_with] == pairs_without[idx_without])
				++idx_without;
			else
				mp[i][pairs_with[idx_with]] = true;
		}
	}

	for(int i = 2; i <= n; ++i){
		int first_bit = 0;
		for(; first_bit < kBits; ++first_bit)
			if((1 << first_bit) & i)
				break;

		ans[i - 1] = -1;
		for(auto p: mp[first_bit]){
			int x = p.first;
			bool ok = true;

			for(int bit = 0; bit < kBits; ++bit){
				if(bit == first_bit)
					continue;

				if((1 << bit) & i){
					if(!mp[bit].count(x)){
						ok = false;
						break;
					}
				}
				else{
					if(mp[bit].count(x)){
						ok = false;
						break;
					}
				}
			}

			if(ok){
				ans[i - 1] = x ^ ans[0];
				break;
			}
		}
	}

	return ans;
}

Compilation message

Xoractive.cpp: In function 'std::vector<int> guess(int)':
Xoractive.cpp:29:51: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int idx_with = 0, idx_without = 0; idx_with < pairs_with.size(); ++idx_with){
                                          ~~~~~~~~~^~~~~~~~~~~~~~~~~~~
Xoractive.cpp:30:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if(idx_without < pairs_without.size() && pairs_with[idx_with] == pairs_without[idx_without])
       ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 256 KB Output is correct
2 Correct 4 ms 256 KB Output is correct
3 Correct 4 ms 256 KB Output is correct
4 Correct 4 ms 256 KB Output is correct

Subtask #2
94.0 / 94.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 384 KB Output is correct
2 Correct 6 ms 384 KB Output is correct
3 Correct 6 ms 384 KB Output is correct
4 Correct 6 ms 384 KB Output is correct
5 Correct 7 ms 384 KB Output is correct
6 Correct 6 ms 384 KB Output is correct
7 Correct 6 ms 384 KB Output is correct
8 Correct 7 ms 384 KB Output is correct
9 Correct 7 ms 384 KB Output is correct
10 Correct 6 ms 384 KB Output is correct
11 Correct 6 ms 384 KB Output is correct
12 Correct 6 ms 384 KB Output is correct
13 Correct 6 ms 384 KB Output is correct
14 Correct 7 ms 384 KB Output is correct
15 Correct 6 ms 384 KB Output is correct
16 Correct 6 ms 384 KB Output is correct
17 Correct 7 ms 384 KB Output is correct
18 Correct 6 ms 384 KB Output is correct
19 Correct 6 ms 384 KB Output is correct
20 Correct 6 ms 384 KB Output is correct
21 Correct 7 ms 384 KB Output is correct
22 Correct 6 ms 384 KB Output is correct
23 Correct 6 ms 384 KB Output is correct
24 Correct 7 ms 384 KB Output is correct
25 Correct 6 ms 384 KB Output is correct
26 Correct 6 ms 384 KB Output is correct
27 Correct 6 ms 384 KB Output is correct
28 Correct 6 ms 384 KB Output is correct
29 Correct 6 ms 384 KB Output is correct
30 Correct 6 ms 384 KB Output is correct
31 Correct 7 ms 512 KB Output is correct
32 Correct 6 ms 384 KB Output is correct
33 Correct 6 ms 384 KB Output is correct
34 Correct 6 ms 384 KB Output is correct
35 Correct 6 ms 384 KB Output is correct
36 Correct 6 ms 384 KB Output is correct
37 Correct 6 ms 384 KB Output is correct
38 Correct 6 ms 384 KB Output is correct
39 Correct 6 ms 384 KB Output is correct
40 Correct 6 ms 384 KB Output is correct
41 Correct 6 ms 384 KB Output is correct
42 Correct 6 ms 384 KB Output is correct
43 Correct 6 ms 384 KB Output is correct
44 Correct 6 ms 384 KB Output is correct
45 Correct 6 ms 384 KB Output is correct
46 Correct 6 ms 384 KB Output is correct
47 Correct 6 ms 384 KB Output is correct
48 Correct 6 ms 384 KB Output is correct
49 Correct 6 ms 384 KB Output is correct
50 Correct 6 ms 384 KB Output is correct
51 Correct 6 ms 384 KB Output is correct
52 Correct 6 ms 384 KB Output is correct
53 Correct 6 ms 384 KB Output is correct
54 Correct 6 ms 384 KB Output is correct
55 Correct 6 ms 384 KB Output is correct
56 Correct 6 ms 384 KB Output is correct
57 Correct 6 ms 384 KB Output is correct
58 Correct 6 ms 384 KB Output is correct
59 Correct 6 ms 384 KB Output is correct
60 Correct 6 ms 384 KB Output is correct
61 Correct 6 ms 384 KB Output is correct
62 Correct 6 ms 384 KB Output is correct
63 Correct 6 ms 384 KB Output is correct
64 Correct 6 ms 384 KB Output is correct
65 Correct 6 ms 384 KB Output is correct
66 Correct 7 ms 384 KB Output is correct
67 Correct 6 ms 384 KB Output is correct
68 Correct 7 ms 384 KB Output is correct
69 Correct 6 ms 384 KB Output is correct
70 Correct 7 ms 384 KB Output is correct
71 Correct 6 ms 384 KB Output is correct
72 Correct 6 ms 384 KB Output is correct
73 Correct 6 ms 384 KB Output is correct
74 Correct 6 ms 384 KB Output is correct
75 Correct 6 ms 384 KB Output is correct
76 Correct 7 ms 384 KB Output is correct
77 Correct 6 ms 384 KB Output is correct
78 Correct 7 ms 384 KB Output is correct
79 Correct 6 ms 384 KB Output is correct
80 Correct 6 ms 384 KB Output is correct
81 Correct 7 ms 384 KB Output is correct
82 Correct 6 ms 384 KB Output is correct
83 Correct 6 ms 384 KB Output is correct
84 Correct 7 ms 384 KB Output is correct
85 Correct 6 ms 384 KB Output is correct
86 Correct 7 ms 384 KB Output is correct
87 Correct 6 ms 384 KB Output is correct
88 Correct 7 ms 384 KB Output is correct
89 Correct 6 ms 384 KB Output is correct
90 Correct 6 ms 384 KB Output is correct
91 Correct 6 ms 384 KB Output is correct
92 Correct 7 ms 384 KB Output is correct
93 Correct 6 ms 384 KB Output is correct
94 Correct 6 ms 384 KB Output is correct
95 Correct 6 ms 384 KB Output is correct
96 Correct 6 ms 428 KB Output is correct
97 Correct 6 ms 384 KB Output is correct
98 Correct 6 ms 384 KB Output is correct
99 Correct 6 ms 384 KB Output is correct
100 Correct 7 ms 384 KB Output is correct