oj.uz

Submission #304491

# Submission time Handle Problem Language Result Execution time Memory
304491 2020-09-21T12:22:19 Z arnold518 Counting Mushrooms (IOI20_mushrooms) C++14
92.2449 / 100
 9 ms 384 KB 
#include "mushrooms.h"
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 2e4;
const int SQ = 100;

int N;

int query(vector<int> V)
{
	return use_machine(V);
}

int naive()
{
	int ans=1;
	for(int i=1; i+1<N; i+=2)
	{
		ans+=2-query({i, 0, i+1});
	}
	if(N%2==0) ans+=1-query({0, N-1});
	return ans;
}

int count_mushrooms(int _N)
{
	N=_N;
	if(N<=2*SQ) return naive();

	vector<int> A, B;
	A.push_back(0);

	int p, ans=0;

	for(p=1; p<=2; p++)
	{
		if(query({0, p})) B.push_back(p);
		else A.push_back(p);
	}

	if(A.size()>=2)
	{
		for(; p+1<N && A.size()<SQ && B.size()<SQ; p+=2)
		{
			int t=query({A[0], p, A[1], p+1});
			if(t==0) A.push_back(p), A.push_back(p+1);
			else if(t==1) A.push_back(p), B.push_back(p+1);
			else if(t==2) B.push_back(p), A.push_back(p+1);
			else B.push_back(p), B.push_back(p+1);
		}
	}
	else
	{
		for(; p+1<N && A.size()<SQ && B.size()<SQ; p+=2)
		{
			int t=query({B[0], p, B[1], p+1});
			if(t==0) B.push_back(p), B.push_back(p+1);
			else if(t==1) B.push_back(p), A.push_back(p+1);
			else if(t==2) A.push_back(p), B.push_back(p+1);
			else A.push_back(p), A.push_back(p+1);
		}
	}

	ans=0;

	while(p<N)
	{
		if(A.size()>B.size())
		{
			int i, j;
			vector<int> V;
			for(j=0; p<N && j<A.size(); p++, j++)
			{
				V.push_back(A[j]);
				V.push_back(p);
			}
			int t=query(V);
			if(t%2) B.push_back(V.back());
			else A.push_back(V.back());
			ans+=j-t/2-1;
		}
		else
		{
			int i, j;
			vector<int> V;
			for(j=0; p<N && j<B.size(); p++, j++)
			{
				V.push_back(B[j]);
				V.push_back(p);
			}
			int t=query(V);
			if(t%2) A.push_back(V.back());
			else B.push_back(V.back());
			ans+=t/2;
		}
	}

	return ans+A.size();
}

Compilation message

mushrooms.cpp: In function 'int count_mushrooms(int)':
mushrooms.cpp:77:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   77 |    for(j=0; p<N && j<A.size(); p++, j++)
      |                    ~^~~~~~~~~
mushrooms.cpp:75:8: warning: unused variable 'i' [-Wunused-variable]
   75 |    int i, j;
      |        ^
mushrooms.cpp:91:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   91 |    for(j=0; p<N && j<B.size(); p++, j++)
      |                    ~^~~~~~~~~
mushrooms.cpp:89:8: warning: unused variable 'i' [-Wunused-variable]
   89 |    int i, j;
      |        ^

Subtask #1
92.2449 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 1 ms 256 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 7 ms 256 KB Output is correct
8 Correct 6 ms 256 KB Output is correct
9 Correct 7 ms 256 KB Output is correct
10 Correct 8 ms 256 KB Output is correct
11 Partially correct 7 ms 384 KB Output is partially correct
12 Correct 7 ms 256 KB Output is correct
13 Correct 8 ms 256 KB Output is correct
14 Correct 4 ms 256 KB Output is correct
15 Partially correct 7 ms 256 KB Output is partially correct
16 Partially correct 7 ms 384 KB Output is partially correct
17 Correct 5 ms 256 KB Output is correct
18 Correct 7 ms 256 KB Output is correct
19 Partially correct 7 ms 256 KB Output is partially correct
20 Correct 8 ms 256 KB Output is correct
21 Correct 7 ms 256 KB Output is correct
22 Partially correct 7 ms 256 KB Output is partially correct
23 Correct 7 ms 384 KB Output is correct
24 Correct 6 ms 256 KB Output is correct
25 Partially correct 7 ms 256 KB Output is partially correct
26 Partially correct 7 ms 384 KB Output is partially correct
27 Partially correct 8 ms 384 KB Output is partially correct
28 Partially correct 7 ms 256 KB Output is partially correct
29 Partially correct 9 ms 256 KB Output is partially correct
30 Partially correct 7 ms 256 KB Output is partially correct
31 Partially correct 8 ms 256 KB Output is partially correct
32 Partially correct 7 ms 376 KB Output is partially correct
33 Partially correct 7 ms 376 KB Output is partially correct
34 Partially correct 8 ms 256 KB Output is partially correct
35 Partially correct 7 ms 256 KB Output is partially correct
36 Partially correct 7 ms 256 KB Output is partially correct
37 Partially correct 7 ms 256 KB Output is partially correct
38 Partially correct 7 ms 384 KB Output is partially correct
39 Partially correct 7 ms 384 KB Output is partially correct
40 Partially correct 8 ms 384 KB Output is partially correct
41 Partially correct 7 ms 384 KB Output is partially correct
42 Partially correct 8 ms 256 KB Output is partially correct
43 Partially correct 7 ms 256 KB Output is partially correct
44 Partially correct 9 ms 384 KB Output is partially correct
45 Partially correct 9 ms 256 KB Output is partially correct
46 Partially correct 9 ms 384 KB Output is partially correct
47 Partially correct 7 ms 384 KB Output is partially correct
48 Partially correct 7 ms 256 KB Output is partially correct
49 Partially correct 7 ms 376 KB Output is partially correct
50 Partially correct 7 ms 384 KB Output is partially correct
51 Partially correct 7 ms 256 KB Output is partially correct
52 Partially correct 7 ms 376 KB Output is partially correct
53 Partially correct 7 ms 384 KB Output is partially correct
54 Partially correct 7 ms 384 KB Output is partially correct
55 Partially correct 7 ms 256 KB Output is partially correct
56 Partially correct 7 ms 256 KB Output is partially correct
57 Partially correct 7 ms 256 KB Output is partially correct
58 Partially correct 6 ms 256 KB Output is partially correct
59 Partially correct 7 ms 376 KB Output is partially correct
60 Partially correct 9 ms 376 KB Output is partially correct
61 Partially correct 7 ms 384 KB Output is partially correct
62 Correct 0 ms 256 KB Output is correct
63 Correct 0 ms 256 KB Output is correct
64 Correct 0 ms 256 KB Output is correct
65 Correct 0 ms 256 KB Output is correct
66 Correct 0 ms 256 KB Output is correct
67 Correct 0 ms 256 KB Output is correct
68 Correct 1 ms 256 KB Output is correct
69 Correct 1 ms 256 KB Output is correct
70 Correct 0 ms 256 KB Output is correct
71 Correct 0 ms 256 KB Output is correct
72 Correct 0 ms 256 KB Output is correct
73 Correct 1 ms 256 KB Output is correct
74 Correct 0 ms 256 KB Output is correct
75 Correct 0 ms 256 KB Output is correct
76 Correct 0 ms 256 KB Output is correct
77 Correct 0 ms 256 KB Output is correct
78 Correct 0 ms 256 KB Output is correct
79 Correct 0 ms 256 KB Output is correct
80 Correct 0 ms 256 KB Output is correct
81 Correct 0 ms 256 KB Output is correct
82 Correct 0 ms 256 KB Output is correct
83 Correct 1 ms 256 KB Output is correct
84 Correct 0 ms 256 KB Output is correct
85 Correct 0 ms 256 KB Output is correct
86 Correct 0 ms 256 KB Output is correct
87 Correct 0 ms 256 KB Output is correct
88 Correct 0 ms 256 KB Output is correct
89 Correct 0 ms 256 KB Output is correct
90 Correct 0 ms 256 KB Output is correct
91 Correct 0 ms 256 KB Output is correct