제출 #1052087

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1052087		TahirAliyev	버섯 세기 (IOI20_mushrooms)	C++17	75.59 / 100	5 ms	444 KiB

mushrooms

#include "mushrooms.h"
#include <bits/stdc++.h>
using namespace std;
#define pii pair<int, int>
#define ll long long
#define all(v) v.begin(), v.end()
#define oo 1e9
const int B = 100;

int count_mushrooms(int n){
	vector<int> v[2];
	v[0] = {0};
	int i = 1;
	for(; i < min(3, n); i++){
		v[use_machine({0, i})].push_back(i);
	}
	int t = (v[0].size() < v[1].size());
	for(; i + 1 < n && (int)max(v[0].size(), v[1].size()) < B; i += 2){
		int a = use_machine({i, v[t][0], i + 1, v[t][1]}); 
		v[t ^ (a & 1)].push_back(i);
		v[t ^ bool(a & 2)].push_back(i + 1);
	}
	if(i == n - 1){
		v[use_machine({0, i})].push_back(i);
		i++;
	}
	int ans = v[0].size();
	if(i == n) return ans;
	t = (v[0].size() < v[1].size());
	while(i < n){
		vector<int> tmp;
		for(int j = 0; j < v[t].size() && i < n; j++, i++){
			tmp.push_back(v[t][j]);
			tmp.push_back(i);
		}
		if(t) ans += (use_machine(tmp) + 1) / 2;
		else ans += (tmp.size() / 2) - (use_machine(tmp) + 1) / 2;
	}
	return ans;
}

컴파일 시 표준 에러 (stderr) 메시지

mushrooms.cpp: In function 'int count_mushrooms(int)':
mushrooms.cpp:32:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |   for(int j = 0; j < v[t].size() && i < n; j++, i++){
      |                  ~~^~~~~~~~~~~~~

• Subtask 1: 75.5853 / 100