제출 #64245

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
64245		gnoor	Hotter Colder (IOI10_hottercolder)	C++17	78 / 100	806 ms	8248 KiB

hottercolder

//#include "hottercolder.h"
#include <cstdio>
#include "grader.h"
#include <algorithm>

using namespace std;

int HC(int N){
	//int g = Guess(1);
	int lo=1;
	int hi=N;
	int lastguess=1;
	Guess(lastguess);
	int lmid;
	int rmid;
	int res;
	
	while (lo<hi) {
		lmid=lastguess;
		rmid=hi-lastguess+lo;
		if (rmid<lo||rmid>hi) {
			lmid=lo;
			Guess(lmid);
			rmid=hi;
		}
		//printf("newguess %d\n",rmid);
		res=Guess(rmid);
		lastguess=rmid;
		if (rmid<lmid) {
			swap(rmid,lmid);
			res=-res;
		}
		//printf("%d %d %d %d\n",lo,hi,lmid,rmid);
		if (res==0) return (lmid+rmid)>>1;
		if (res<0) {
			//printf("lmid\n");
			//lmid side
			hi=((lmid+rmid)>>1)-((rmid-lmid+1)%2);
			//printf("hi %d\n",hi);
		} else {
			//printf("rmid\n");
			//rmid side
			lo=((lmid+rmid)>>1)+1;
		}
	}
	return lo;
}

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