Submission #209663

#	Time	Username	Problem	Language	Result	Execution time	Memory
209663		TAISA_	Combo (IOI18_combo)	C++14	100 / 100	80 ms	8512 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
using namespace std;
std::string guess_sequence(int N) {
	string res="";
	string p="AB";
	string c;
	if(press(p)){
		p="A";
		if(press(p)){
			c="BXY";
			res+="A";
		}else{
			c="AXY";
			res+="B";
		}
	}else{
		p="X";
		if(press(p)){
			c="ABY";
			res+="X";
		}else{
			c="ABX";
			res+="Y";
		}
	}
	if(N==1)return res;
	for(int i=1;i+1<N;i++){
		p="";
		int cnt=0;
		for(int j=0;j<3;j++){
			p+=res+c[0]+c[j];
		}
		p+=res+c[1];
		int r=press(p)-res.length();
		cerr<<p<<" "<<r<<endl;
		if(r==1){
			res+=c[1];
		}else if(r==2){
			res+=c[0];
		}else{
			res+=c[2];
		}
	}
	p=res+c[0]+res+c[1];
	if(press(p)>res.length()){
		p=res+c[0];
		if(press(p)>res.length()){
			res+=c[0];
		}else{
			res+=c[1];
		}
	}else{
		res+=c[2];
	}
	cerr<<res<<endl;
	return res;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:30:7: warning: unused variable 'cnt' [-Wunused-variable]
   30 |   int cnt=0;
      |       ^~~
combo.cpp:46:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |  if(press(p)>res.length()){
      |     ~~~~~~~~^~~~~~~~~~~~~
combo.cpp:48:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |   if(press(p)>res.length()){
      |      ~~~~~~~~^~~~~~~~~~~~~

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