Submission #95577

#	Time	Username	Problem	Language	Result	Execution time	Memory
95577		rocketninja7	Combo (IOI18_combo)	C++14	30 / 100	70 ms	588 KiB

combo

#include "combo.h"

std::string guess_sequence(int N) {
    std::string p = "";
    int coinsAB = press("AB");
    char buttons[3];
    std::string S = "";
    if(coinsAB>=1){
        int coinsA=press("A");
        if(coinsA==1){
            S+='A';
            buttons[0]='B';
            buttons[1]='X';
            buttons[2]='Y';
        }
        else{
            S+='B';
            buttons[0]='A';
            buttons[1]='X';
            buttons[2]='Y';
        }
    }
    else{
        int coinsX=press("X");
        if(coinsX==1){
            S+='X';
            buttons[0]='A';
            buttons[1]='B';
            buttons[2]='Y';
        }
        else{
            S+='Y';
            buttons[0]='A';
            buttons[1]='B';
            buttons[2]='X';
        }
    }
    while(S.length()<N){
        p=S+buttons[0];
        if(press(p)==p.length()){
            S+=buttons[0];
        }
        else{
            p=S+buttons[1];
            if(press(p)==p.length()){
                S+=buttons[1];
            }
            else{
                S+=buttons[2];
            }
        }
    }
    return S;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:38:21: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   38 |     while(S.length()<N){
      |           ~~~~~~~~~~^~
combo.cpp:40:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |         if(press(p)==p.length()){
      |            ~~~~~~~~^~~~~~~~~~~~
combo.cpp:45:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |             if(press(p)==p.length()){
      |                ~~~~~~~~^~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 25 / 95