Submission #873510

#	Time	Username	Problem	Language	Result	Execution time	Memory
873510		velislavgarkov	Combo (IOI18_combo)	C++14	100 / 100	11 ms	1832 KiB

combo

#include "combo.h"
#include <iostream>
using namespace std;
string guess_sequence(int n) {
    string ans, s;
    if (press("AB")) {
        if (press("A")) {
            ans+='A';
            s="BXY";
        } else {
            ans+='B';
            s="AXY";
        }
    } else {
        if (press("X")) {
            ans+='X';
            s="ABY";
        } else {
            ans+='Y';
            s="ABX";
        }
    }
    if (n==1) return ans;
    for (int i=1;i<n-1;i++) {
        string q=ans+s[0]+s[0]+ans+s[0]+s[1]+ans+s[0]+s[2]+ans+s[1];
        int que=press(q);
        if (que==ans.size()+2) ans+=s[0];
        else if (que==ans.size()+1) ans+=s[1];
        else ans+=s[2];
    }
    if (press(ans+s[0])==ans.size()+1) ans+=s[0];
    else if (press(ans+s[1])==ans.size()+1) ans+=s[1];
    else ans+=s[2];
    return ans;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:27:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |         if (que==ans.size()+2) ans+=s[0];
      |             ~~~^~~~~~~~~~~~~~
combo.cpp:28:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |         else if (que==ans.size()+1) ans+=s[1];
      |                  ~~~^~~~~~~~~~~~~~
combo.cpp:31:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |     if (press(ans+s[0])==ans.size()+1) ans+=s[0];
      |         ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~
combo.cpp:32:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |     else if (press(ans+s[1])==ans.size()+1) ans+=s[1];
      |              ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~

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