Submission #443836

#	Time	Username	Problem	Language	Result	Execution time	Memory
443836		maximath_1	Combo (IOI18_combo)	C++11	100 / 100	45 ms	584 KiB

combo

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

string guess_sequence(int N){
	string res="";
	if(press("AB")>=1){
		if(press("A")) res="A";
		else res="B";
	}else{
		if(press("X")) res="X";
		else res="Y";
	}
	if(N==1) return res;
	vector<char>c={'A','B','X','Y'};
	c.erase(find(c.begin(), c.end(), res[0]));
	while(res.size()<=N-2){
		int op=press(res+c[0]+c[0] +res+c[0]+c[1] +res+c[1]+c[0]);
		if(op==res.size()){
			res=res+c[2];
		}else if(op==res.size()+1){
			op=press(res+c[1]+c[2]);
			if(op==res.size()) res=res+c[0]+c[2];
			else if(op==res.size()+1) res=res+c[1]+c[1];
			else res=res+c[1]+c[2];
		}else{
			op=press(res+c[0]+c[1]);
			if(op==res.size()) res=res+c[1]+c[0];
			else if(op==res.size()+1) res=res+c[0]+c[0];
			else res=res+c[0]+c[1];
		}
	}
	while(res.size()!=N){
		if(press(res+c[0])==res.size()+1) res=res+c[0];
		else if(press(res+c[1])==res.size()+1) res=res+c[1];
		else res=res+c[2];
	}
	return res;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:17:18: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   17 |  while(res.size()<=N-2){
      |        ~~~~~~~~~~^~~~~
combo.cpp:19:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |   if(op==res.size()){
      |      ~~^~~~~~~~~~~~
combo.cpp:21:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |   }else if(op==res.size()+1){
      |            ~~^~~~~~~~~~~~~~
combo.cpp:23:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |    if(op==res.size()) res=res+c[0]+c[2];
      |       ~~^~~~~~~~~~~~
combo.cpp:24:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |    else if(op==res.size()+1) res=res+c[1]+c[1];
      |            ~~^~~~~~~~~~~~~~
combo.cpp:28:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |    if(op==res.size()) res=res+c[1]+c[0];
      |       ~~^~~~~~~~~~~~
combo.cpp:29:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |    else if(op==res.size()+1) res=res+c[0]+c[0];
      |            ~~^~~~~~~~~~~~~~
combo.cpp:33:18: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   33 |  while(res.size()!=N){
      |        ~~~~~~~~~~^~~
combo.cpp:34:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |   if(press(res+c[0])==res.size()+1) res=res+c[0];
      |      ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~
combo.cpp:35:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |   else if(press(res+c[1])==res.size()+1) res=res+c[1];
      |           ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~

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