Submission #91506

#	Time	Username	Problem	Language	Result	Execution time	Memory
91506		javert2001	Combo (IOI18_combo)	C++14	100 / 100	46 ms	552 KiB

combo

#include<bits/stdc++.h>
#include "combo.h"
using namespace std;
std::string guess_sequence(int N) {
  string ret;
    string manda;
    char uno;
    char dos;
    char tres;
    manda='A';
    manda+='B';
    if(press(manda)==0){
        manda='X';
        if(press(manda)==1){
            ret='X';
            uno = 'A';
            dos = 'B';
            tres = 'Y';
        }else{
            ret='Y';
            uno = 'A';
            dos = 'B';
            tres = 'X';
        }
    }else{
        manda='A';
        if(press(manda)==1){
            ret='A';
            uno = 'X';
            dos = 'B';
            tres = 'Y';
        }else{
            ret='B';
            uno = 'A';
            dos = 'X';
            tres = 'Y';
        }
    }
    if(N==1)return ret;
    for(int i=2;i<N;i++){
        manda=ret;
        manda+=uno;
        manda+=ret;
        manda+=dos;
        manda+=uno;
        manda+=ret;
        manda+=dos;
        manda+=dos;
        manda+=ret;
        manda+=dos;
        manda+=tres;
        int act=press(manda);
        if(act==ret.size()){
            ret+=tres;
        }else
        if(act==ret.size()+1){
            ret+=uno;
        }else{
            ret+=dos;
        }
    }
    manda=ret;
    manda+=uno;
    if(press(manda)==N){
        ret+=uno;
        return ret;
    }
    manda=ret;
    manda+=dos;
    if(press(manda)==N){
        ret+=dos;
        return ret;
    }
    ret+=tres;
    return ret;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:53:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |         if(act==ret.size()){
      |            ~~~^~~~~~~~~~~~
combo.cpp:56:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |         if(act==ret.size()+1){
      |            ~~~^~~~~~~~~~~~~~

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