Submission #1072245

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1072245	2024-08-23T15:55:05 Z	Itamar	Counting Mushrooms (IOI20_mushrooms)	C++14	51.8349 / 100	43 ms	884 KB

mushrooms

using namespace std;
#include <vector>
#define ll long long
#define vll vector<ll>
#include<iostream>
#define vi vector<int>
int use_machine(std::vector<int> x);
#include<bitset>
	const int k = 15;
int count_mushrooms(int n) {
	vi v[2];
	v[0].push_back(0);
	/*v[use_machine({0,1})].push_back(1);
	if(n==2)return v[0].size();
	v[use_machine({0,2})].push_back(2);
	if(n == 3)return v[0].size();
	int i1,i2;*/
	int ans = 0;
	bool f;

	int sq = min(n-1,170);
	int m= 1;
	
	for(int i = 1; i+k-2 < sq; i+=k-1){
		vector<bitset<k>> b;
		for(int j = 0; j < (1<<k); j+=2){
			bitset<k> bb = j;
			b.push_back(bb);
		}
		bitset<(1<<(k-1))>pos;for(int i = 0; i < 1<<(k-1); i++)pos[i]=1;
		vi ind = {0}; for(int j = i; j < i+k-1; j++)ind.push_back(j);
		while(pos.count()>1){
			vi vec;
			vi r;
			for(int j = 0; j < k; j++)if(rand()%2)r.push_back(j);
			for(int i : r)vec.push_back(ind[i]);
			int c = use_machine(vec);
			for(int j = 0; j < (1<<(k-1)); j++){
				int cc = 0;
				for(int t= 0; t < vec.size()-1; t++){
					cc+=(b[j][r[t]]^b[j][r[t+1]]);
				}
				if(cc!=c)pos[j]=0;
			}
		}
		for(int j = 0; j < (1<<(k-1)); j++){
			if(pos[j]){
				for(int t=  1; t < k; t++){
					v[(b[j][t])].push_back(ind[t]);
				}
			}
		}
		m = i+k-1;
	}

	ans = v[0].size();
	f = (v[1].size() > v[0].size());
	int s = v[f].size();
	for(int i = m; i < n; i+=s){
		int j = min(n-1, i+s-1);
		vi q;
		for(int k = i; k <= j; k++){
			q.push_back(k);
			q.push_back(v[f][k-i]);
		}
		int c = use_machine(q);
		if(!f){
			ans += q.size()/2;
			ans -= (c/2);
			ans -= (c%2);
		}else{
			ans += c/2;
			ans+=c%2;
		}
	}
	return ans;
}

Compilation message

mushrooms.cpp: In function 'int count_mushrooms(int)':
mushrooms.cpp:40:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |     for(int t= 0; t < vec.size()-1; t++){
      |                   ~~^~~~~~~~~~~~~~

Subtask #1

51.8349 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	344 KB	Output is correct
2	Correct	0 ms	344 KB	Output is correct
3	Correct	0 ms	344 KB	Output is correct
4	Correct	4 ms	600 KB	Output is correct
5	Correct	22 ms	712 KB	Output is correct
6	Correct	22 ms	752 KB	Output is correct
7	Correct	12 ms	632 KB	Output is correct
8	Correct	13 ms	632 KB	Output is correct
9	Correct	14 ms	720 KB	Output is correct
10	Partially correct	26 ms	884 KB	Output is partially correct
11	Partially correct	37 ms	620 KB	Output is partially correct
12	Partially correct	32 ms	752 KB	Output is partially correct
13	Correct	16 ms	632 KB	Output is correct
14	Partially correct	23 ms	712 KB	Output is partially correct
15	Partially correct	32 ms	628 KB	Output is partially correct
16	Partially correct	23 ms	628 KB	Output is partially correct
17	Correct	25 ms	624 KB	Output is correct
18	Correct	17 ms	632 KB	Output is correct
19	Partially correct	25 ms	620 KB	Output is partially correct
20	Partially correct	26 ms	632 KB	Output is partially correct
21	Partially correct	23 ms	632 KB	Output is partially correct
22	Partially correct	27 ms	712 KB	Output is partially correct
23	Partially correct	25 ms	632 KB	Output is partially correct
24	Partially correct	36 ms	716 KB	Output is partially correct
25	Partially correct	25 ms	712 KB	Output is partially correct
26	Partially correct	21 ms	628 KB	Output is partially correct
27	Partially correct	25 ms	864 KB	Output is partially correct
28	Partially correct	26 ms	708 KB	Output is partially correct
29	Partially correct	39 ms	728 KB	Output is partially correct
30	Partially correct	24 ms	628 KB	Output is partially correct
31	Partially correct	24 ms	628 KB	Output is partially correct
32	Partially correct	28 ms	728 KB	Output is partially correct
33	Partially correct	30 ms	632 KB	Output is partially correct
34	Partially correct	27 ms	632 KB	Output is partially correct
35	Partially correct	31 ms	628 KB	Output is partially correct
36	Partially correct	28 ms	624 KB	Output is partially correct
37	Partially correct	27 ms	624 KB	Output is partially correct
38	Partially correct	29 ms	624 KB	Output is partially correct
39	Partially correct	37 ms	628 KB	Output is partially correct
40	Partially correct	25 ms	628 KB	Output is partially correct
41	Partially correct	27 ms	632 KB	Output is partially correct
42	Partially correct	29 ms	632 KB	Output is partially correct
43	Partially correct	38 ms	720 KB	Output is partially correct
44	Partially correct	24 ms	632 KB	Output is partially correct
45	Partially correct	22 ms	708 KB	Output is partially correct
46	Partially correct	26 ms	632 KB	Output is partially correct
47	Partially correct	22 ms	720 KB	Output is partially correct
48	Partially correct	22 ms	616 KB	Output is partially correct
49	Partially correct	26 ms	632 KB	Output is partially correct
50	Partially correct	31 ms	624 KB	Output is partially correct
51	Partially correct	43 ms	628 KB	Output is partially correct
52	Partially correct	29 ms	624 KB	Output is partially correct
53	Partially correct	25 ms	628 KB	Output is partially correct
54	Partially correct	22 ms	624 KB	Output is partially correct
55	Partially correct	24 ms	628 KB	Output is partially correct
56	Partially correct	29 ms	616 KB	Output is partially correct
57	Partially correct	34 ms	628 KB	Output is partially correct
58	Partially correct	20 ms	632 KB	Output is partially correct
59	Partially correct	25 ms	756 KB	Output is partially correct
60	Partially correct	22 ms	632 KB	Output is partially correct
61	Partially correct	29 ms	632 KB	Output is partially correct
62	Correct	1 ms	344 KB	Output is correct
63	Correct	0 ms	344 KB	Output is correct
64	Correct	0 ms	344 KB	Output is correct
65	Correct	0 ms	344 KB	Output is correct
66	Correct	0 ms	344 KB	Output is correct
67	Correct	0 ms	344 KB	Output is correct
68	Correct	0 ms	344 KB	Output is correct
69	Correct	0 ms	344 KB	Output is correct
70	Correct	0 ms	344 KB	Output is correct
71	Correct	0 ms	344 KB	Output is correct
72	Correct	0 ms	344 KB	Output is correct
73	Correct	0 ms	344 KB	Output is correct
74	Correct	0 ms	344 KB	Output is correct
75	Correct	0 ms	344 KB	Output is correct
76	Correct	0 ms	344 KB	Output is correct
77	Correct	0 ms	344 KB	Output is correct
78	Correct	0 ms	344 KB	Output is correct
79	Correct	0 ms	344 KB	Output is correct
80	Correct	0 ms	344 KB	Output is correct
81	Correct	0 ms	344 KB	Output is correct
82	Correct	0 ms	344 KB	Output is correct
83	Correct	0 ms	344 KB	Output is correct
84	Correct	0 ms	344 KB	Output is correct
85	Correct	0 ms	344 KB	Output is correct
86	Correct	0 ms	344 KB	Output is correct
87	Correct	1 ms	344 KB	Output is correct
88	Correct	0 ms	344 KB	Output is correct
89	Correct	0 ms	344 KB	Output is correct
90	Correct	0 ms	344 KB	Output is correct
91	Correct	0 ms	344 KB	Output is correct