제출 #41861

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
41861		rahasia	커다란 상품 (IOI17_prize)	C++14	20 / 100	355 ms	5256 KiB

prize

#include "prize.h"
#include <bits/stdc++.h>
using namespace std;

int find_best(int n) {
	int awal,akhir,kiri,kanan,pos,pos1,pos2,aa,bb,itr;
	int ans;
	int coba[200009];
	vector <int> a;
	vector <int> cand,cand2;
	bool sudah[200009];
	for(itr=0;itr<n;++itr)
	{
		cand.push_back(itr);
	}
	ans = -1;
	kiri = 0;
	kanan = n-1;
	while(true)
	{
		if(ans != -1)
		{
			return ans;
			break;
		}
		for(itr=0;itr<cand.size();++itr)
		{
			sudah[itr] = false;
		}
		awal = 0;
		akhir = cand.size()-1;
		pos = (akhir-awal)/2;
		pos1 = pos;
		pos2 = pos;
		while(pos1 > 0)
		{
			a = ask(cand[pos1]);
			sudah[pos1] = true;
			if(a[0] == 0 && a[1] == 0)
			{
				ans = cand[pos1];
				return ans;
				break;
			}
			else if(a[0] == 0)
			{
				kiri = max(kiri, cand[pos1]);
				break;
			}
			else if(a[1] == 0)
			{
				kanan = min(kanan, cand[pos1]);
			}
			pos1 = pos1/2;
		}
		a = ask(cand[0]);
		sudah[0] = true;
		if(a[0] == 0 && a[1] == 0)
		{
			ans = cand[pos1];
			return ans;
			break;
		}
		else if(a[0] == 0)
		{
			kiri = max(kiri, cand[0]);
		}
		else if(a[1] == 0)
		{
			kanan = min(kanan, cand[0]);
		}
		while(pos2 < akhir-1)
		{
			a = ask(cand[pos2]);
			sudah[pos2] = true;
			if(a[0] == 0 && a[1] == 0)
			{
				ans = cand[pos2];
				return ans;
				break;
			}
			else if(a[0] == 0)
			{
				kiri = max(kiri, cand[pos2]);
			}
			else if(a[1] == 0)
			{
				kanan = min(kanan, cand[pos2]);
				break;
			}
			pos2 = pos2 + (akhir-pos2)/2;
		}
		a = ask(cand[akhir-1]);
		sudah[akhir-1] = true;
		if(a[0] == 0 && a[1] == 0)
		{
			ans = cand[akhir-1];
			return ans;
			break;
		}
		else if(a[0] == 0)
		{
			kiri = max(kiri, cand[akhir-1]);
		}
		else if(a[1] == 0)
		{
			kanan = min(kanan, cand[akhir-1]);
		}
		a = ask(cand[akhir]);
		sudah[akhir] = true;
		if(a[0] == 0 && a[1] == 0)
		{
			ans = cand[akhir];
			return ans;
			break;
		}
		else if(a[0] == 0)
		{
			kiri = max(kiri, cand[akhir]);
		}
		else if(a[1] == 0)
		{
			kanan = min(kanan, cand[akhir]);
		}
		for(itr=0;itr<cand.size();++itr)
		{
			if(sudah[itr] == false && cand[itr] >= kiri && cand[itr] <= kanan)
			{
				cand2.push_back(cand[itr]);
			}
		}
		cand.clear();
		for(itr=0;itr<cand2.size();++itr)
		{
			cand.push_back(cand2[itr]);
		}
		cand2.clear();
	}
}

컴파일 시 표준 에러 (stderr) 메시지

prize.cpp: In function 'int find_best(int)':
prize.cpp:26:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(itr=0;itr<cand.size();++itr)
                ^
prize.cpp:125:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(itr=0;itr<cand.size();++itr)
                ^
prize.cpp:133:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(itr=0;itr<cand2.size();++itr)
                ^
prize.cpp:6:42: warning: unused variable 'aa' [-Wunused-variable]
  int awal,akhir,kiri,kanan,pos,pos1,pos2,aa,bb,itr;
                                          ^
prize.cpp:6:45: warning: unused variable 'bb' [-Wunused-variable]
  int awal,akhir,kiri,kanan,pos,pos1,pos2,aa,bb,itr;
                                             ^
prize.cpp:8:6: warning: unused variable 'coba' [-Wunused-variable]
  int coba[200009];
      ^

• Subtask 1: 20 / 20
• Subtask 2: 0 / 80