Submission #633423

#	Time	Username	Problem	Language	Result	Execution time	Memory
633423		Doncho_Bonboncho	Combo (IOI18_combo)	C++14	100 / 100	32 ms	556 KiB

combo

#include <bits/stdc++.h>
#include "combo.h"

std::string guess_sequence(int N) {
	/*
	std::string p = "";
	for (int i = 0; i < 4 * N; ++i) {
		p += 'A';
	}
	int coins = press(p);
	std::string S = "";
	for (int i = 0; i < N; ++i) {
		S += 'A';
	}
	*/

	/*
	int fA, fB, fX;
	fA = press("A");
	fB = press("B");
	fX = press("X");
	

	if( fA ) ans += "A";
	else if( fB ) ans += "B";
	else if( fX ) ans += "X";
	else ans += "Y";
	*/
	std::string ans = "";

	if( press("AB") ){
		if( press("A") ) ans = "A";
		else ans = "B";
	}else if( press("X") ) ans = "X";
		else ans = "Y";
	

	//std::cout<<" star with "<<ans<<"\n";

	std::string s[3];

	int ind = 0;
	if( ans != "A" ){ s[ind] = "A"; ind++; }
	if( ans != "B" ){ s[ind] = "B"; ind++; }
	if( ans != "X" ){ s[ind] = "X"; ind++; }
	if( ans != "Y" ){ s[ind] = "Y"; ind++; }

	/*
	std::cerr<<"s[0] "<<s[0]<<"\n";
	std::cerr<<"s[1] "<<s[1]<<"\n";
	std::cerr<<"s[2] "<<s[2]<<"\n";
	*/

	int coins = 1;
	for( int i=0 ; i<N-2 ; i++ ){

		std::string currS = ans + s[0] + s[0] + ans + s[0] + s[1] + ans + s[0] + s[2] + ans + s[1];
	//	std::cout<<currS<<"\n";
		int currCoins = press(currS);
		if( currCoins - 2 == coins ) ans += s[0];
		if( currCoins - 1 == coins ) ans += s[1];
		if( currCoins == coins ) ans += s[2];

	//	std::cout<<"\n"<<ans<<"\n";

		coins ++;
	}

	//std::cerr<<"\n!!"<<ans<<"\n";

	
	std::string curr = ans + s[0] + s[1];
	std::string curr1 = ans + s[0];
	//std::cerr<<s[0]+s[1]<<" "<<press(curr)<<"\n";
	//std::cerr<<s[0]<<" "<<press(curr1)<<"\n";
	if( N >  1 ){
	if( press( ans + s[0] ) != coins ) ans += s[0];
	else if( press( ans + s[1] ) != coins ) ans += s[1];
	else ans += s[2];
	}

	//std::cout<<ans<<"\n";

	return ans;
}

• Subtask 1: 5 / 5
• Subtask 2: 95 / 95