Submission #925766

#	Time	Username	Problem	Language	Result	Execution time	Memory
925766		Art_ogo	Combo (IOI18_combo)	C++17	100 / 100	16 ms	1640 KiB

combo

#include <bits/stdc++.h>
#include "combo.h"

using namespace std;

string guess_sequence(int N) {
    string p;
    if(press("AB")){
        if(press("A"))
            p = "A"; 
        else p = "B";
    }
    else{
        if(press("X"))
            p = "X";
        else p = "Y";
    }
    string S = "ABXY";
    S.erase(S.find(p), 1);
    char a = S[0], b = S[1], c = S[2];
    while(p.size() < N - 1){
        int ans = press(p + a + a + p + a + b + p + b + a);
        if(ans == p.size())
            p += c;
        else if(ans == p.size() + 1){
            ans = press(p + b + b);
            if(ans == p.size())
                p = p + a + c;
            else if(ans == p.size() + 1)
                p = p + b + c;
            else p = p + b + b;
        }
        else{
            ans = press(p + a + a);
            if(ans == p.size())
                p = p + b + a;
            else if(ans == p.size() + 1)
                p = p + a + b;
            else p = p + a + a;
        }
    }
    if(p.size() != N){
        if(press(p + "A" + p + "B") == N){
            if(press(p + "A") == N)
                p = p + "A";
            else p = p + "B";
        }
        else{
            if(press(p + "X") == N)
                p = p + "X";
            else p = p + "Y";
        }
    }
    //cout << p << endl;
    return p;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:21:20: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   21 |     while(p.size() < N - 1){
      |           ~~~~~~~~~^~~~~~~
combo.cpp:23:16: 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(ans == p.size())
      |            ~~~~^~~~~~~~~~~
combo.cpp:25:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |         else if(ans == p.size() + 1){
      |                 ~~~~^~~~~~~~~~~~~~~
combo.cpp:27:20: 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(ans == p.size())
      |                ~~~~^~~~~~~~~~~
combo.cpp:29:25: 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(ans == p.size() + 1)
      |                     ~~~~^~~~~~~~~~~~~~~
combo.cpp:35:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |             if(ans == p.size())
      |                ~~~~^~~~~~~~~~~
combo.cpp:37:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |             else if(ans == p.size() + 1)
      |                     ~~~~^~~~~~~~~~~~~~~
combo.cpp:42:17: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   42 |     if(p.size() != N){
      |        ~~~~~~~~~^~~~

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