oj.uz

Submission #830874

# Submission time Handle Problem Language Result Execution time Memory
830874 2023-08-19T12:10:40 Z caganyanmaz Rarest Insects (IOI22_insects) C++17
0 / 100
 164 ms 456 KB 
#include <bits/stdc++.h>
#include "insects.h"
#define pb push_back
using namespace std;

//#define DEBUGGING

#ifdef DEBUGGING
#include "../debug.h"
#else
#define debug(x...) void(42)
#endif


int n;
set<int> basis;
set<int> machine;

bool check(int val)
{
	vector<int> ci;
	for (int i = 0; i < n; i++)
	{
		if (machine.find(i) != machine.end())
			continue;
		move_inside(i);
		machine.insert(i);
		if (press_button() > val)
		{
			ci.pop_back();
			move_outside(i);
			machine.erase(i);
		}
	}
	bool res = machine.size() == val * basis.size();
	debug(val, res);
	return res;
}

int test_a()
{
	int l = 1, r = 1 + (n / basis.size());
	debug(l, r);
	while (r - l > 1)
	{
		int m = l+r>>1;
		debug(m);
		if(check(m))
		{
			l = m;
		}
		else
		{
			for (auto it = machine.begin(); it != machine.end(); it)
				if (basis.find(*it) == basis.end())
					machine.erase(it++);
				else
					it++;
			r = m;
		}
	}
	debug(l);
	return l;
}
vector<int> bs;

int get_min(int l, int r, vector<int>& v)
{
	if (r - l == 1)
	{
		debug(l, v);
		return v.size()+1;
	}
	int m = l+r>>1;
	for (int i = l; i < m; i++)
	{
		if (machine.find(bs[i]) != machine.end())
			continue;
		machine.insert(bs[i]);
		move_inside(bs[i]);
	}
	for (int i = m; i < r; i++)
	{
		if (machine.find(bs[i]) == machine.end())
			continue;
		machine.erase(bs[i]);
		move_outside(bs[i]);
	}
	vector<int> lv, rv;
	for (int i : v)
	{
		move_inside(i);
		if (press_button() > 1)
			lv.pb(i);
		else
			rv.pb(i);
		move_outside(i);
	}
	int lres = get_min(l, m, lv);
	int rres = get_min(m, r, rv);
	return min(lres, rres);
 
}
 
int test_b()
{
	
	vector<int> v;
	for (int i = 0; i < n; i++)
		if (basis.find(i) == basis.end())
			v.pb(i);
	return get_min(0, bs.size(), v);
}

int min_cardinality(int N)
{
	n = N;
	for (int i = 0; i < n; i++)
	{
		move_inside(i);
		if (press_button() > 1)
			move_outside(i);
		else
			basis.insert(i);
	}	
	for (int i : basis)
	{
		bs.pb(i);
		machine.insert(i);
	}
	return test_a();
	/*
	if (basis.size() > BLOCK)
		return test_a();
	else
		return test_b();
	*/
	
}

Compilation message

insects.cpp: In function 'int test_a()':
insects.cpp:46:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   46 |   int m = l+r>>1;
      |           ~^~
insects.cpp:54:57: warning: for increment expression has no effect [-Wunused-value]
   54 |    for (auto it = machine.begin(); it != machine.end(); it)
      |                                                         ^~
insects.cpp: In function 'int get_min(int, int, std::vector<int>&)':
insects.cpp:74:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   74 |  int m = l+r>>1;
      |          ~^~

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 0 ms 208 KB Output is correct
3 Correct 0 ms 208 KB Output is correct
4 Correct 0 ms 208 KB Output is correct
5 Correct 0 ms 208 KB Output is correct
6 Correct 6 ms 208 KB Output is correct
7 Correct 1 ms 208 KB Output is correct
8 Correct 5 ms 300 KB Output is correct
9 Incorrect 4 ms 304 KB Wrong answer.
10 Halted 0 ms 0 KB -

Subtask #2
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 0 ms 208 KB Output is correct
3 Correct 0 ms 208 KB Output is correct
4 Correct 0 ms 208 KB Output is correct
5 Correct 0 ms 208 KB Output is correct
6 Correct 6 ms 208 KB Output is correct
7 Correct 1 ms 208 KB Output is correct
8 Correct 5 ms 300 KB Output is correct
9 Incorrect 4 ms 304 KB Wrong answer.
10 Halted 0 ms 0 KB -

Subtask #3
0 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Output is correct
2 Correct 1 ms 208 KB Output is correct
3 Correct 0 ms 208 KB Output is correct
4 Correct 0 ms 208 KB Output is correct
5 Correct 0 ms 208 KB Output is correct
6 Correct 0 ms 208 KB Output is correct
7 Correct 54 ms 324 KB Output is correct
8 Correct 18 ms 456 KB Output is correct
9 Correct 37 ms 284 KB Output is correct
10 Partially correct 61 ms 336 KB Output is partially correct
11 Partially correct 98 ms 208 KB Output is partially correct
12 Correct 26 ms 300 KB Output is correct
13 Partially correct 164 ms 288 KB Output is partially correct
14 Partially correct 75 ms 292 KB Output is partially correct
15 Incorrect 79 ms 312 KB Wrong answer.
16 Halted 0 ms 0 KB -