Submission #1011320

#	Time	Username	Problem	Language	Result	Execution time	Memory
1011320		lev1106	Counting Mushrooms (IOI20_mushrooms)	C++17	45.38 / 100	8 ms	444 KiB

mushrooms

#include <cstdio>
#include <cstdlib>
#include <cstdarg>
#include <string>
#include "mushrooms.h"
#include <vector>
#include <iostream>
int sz = 50;
 
int count_mushrooms(int n) {
	int cnt = 1, i = 0;
	bool cur = 0;
	std::vector<int> v0, v1;
	v0.push_back(0);
	for (i = 0; i <= n - 2; i++) {
		if (use_machine({i, i + 1})) cur ^= 1;
		if (!cur) cnt++, v0.push_back(i + 1);
		else v1.push_back(i + 1);
		if (std::max(v0.size(), v1.size()) >= sz + 1) {
			i += 2;
			break;
		}
	}
	bool sw = 0;
	if (v0.size() < v1.size()) swap(v0, v1), sw = 1;
	for (; i < n - 1; i++) {
		//std::cout << i << "!!!\n";
		std::vector<int> v;
		for (int j = i; j <= std::min(i + sz, n) - 1; j++) {
			v.push_back(v0[j - i]);
			v.push_back(j);
		}
		v.push_back(v0[sz]);
		//for (auto j : v) std::cout << j << " ";
		//std::cout << " ||| " << 10 - use_machine(v) << " " << 10 - use_machine(v) / 2 << "\n";
		if (!sw) cnt += v.size() / 2 - use_machine(v) / 2;
		else cnt += use_machine(v) / 2;
		i += sz - 1;
	}
	return cnt;
}

Compilation message (stderr)

mushrooms.cpp: In function 'int count_mushrooms(int)':
mushrooms.cpp:19:38: warning: comparison of integer expressions of different signedness: 'const long unsigned int' and 'int' [-Wsign-compare]
   19 |   if (std::max(v0.size(), v1.size()) >= sz + 1) {
      |       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~

• Subtask 1: 45.3815 / 100