Submission #908541

#	Time	Username	Problem	Language	Result	Execution time	Memory
908541		dragusanu_rares	Combo (IOI18_combo)	C++14	100 / 100	13 ms	1968 KiB

combo

#include <iostream>
#include "combo.h"
using namespace std;
#define P press
string guess_sequence(int n){
    if(n==1){
        if(P("X")==1)return "X";
        else if(P("Y")==1)return "Y";
        else if(P("A")==1)return "A";
        else return "B";
    }
    else{
        char ch1,a,b,c;
        string S;
        if(P("XY")>=1){
            if(P("X")==1)ch1='X';
            else ch1='Y';
        }
        else{
            if(P("A")==1)ch1='A';
            else ch1='B';
        }
        S=ch1;
        if(ch1=='A'){
            a='B';
            b='X';
            c='Y';
        }
        else if(ch1=='B'){
            a='A';
            b='X';
            c='Y';
        }
        else if(ch1=='X'){
            a='A';
            b='B';
            c='Y';
        }
        else{
            a='A';
            b='B';
            c='X';
        }
        while(S.size()<n-1){
            string guess=S+b+S+c+a+S+c+b+S+c+c;
            int x=P(guess)-S.size();
            if(x==0)S.push_back(a);
            else if(x==1)S.push_back(b);
            else S.push_back(c);
        }
        if(P(S+a)==n)return S+a;
        else if(P(S+b)==n)return S+b;
        else return S+c;
    }
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:44:23: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   44 |         while(S.size()<n-1){
      |               ~~~~~~~~^~~~

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