Submission #523439

#	Time	Username	Problem	Language	Result	Execution time	Memory
523439		dron_rp	Combo (IOI18_combo)	C++14	30 / 100	60 ms	296 KiB

combo

#include "combo.h"
#include <set>
#include <iostream>

using namespace std;

string guess_sequence(int N) {
    string S = "";
    set<char> a = {'A', 'B', 'X', 'Y'};
    string p = "";
    for (auto& c : a){
        p = "";
        for (int i = 0; i<N; i++)
            p += c;
        int coins = press(p);
        if (coins >= 1){
            for (int i = 0; i<coins; i++)
                S+=c;
            a.erase(c);
            break; 
        }
    }
    while ((int) S.size() < N){
        int idx = 1;
        for (auto& c : a){
            p = S;
            for (int i = 0; i<N-S.size(); i++){
                p += c;
            }
            int coins = press(p);
            p = "";
            if (coins > S.size()){
                for (int i = 0; i<coins-S.size(); i++){
                    p += c;
                }  
                S += p;
                break; 
            }
        }
    }
    return S;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:27:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |             for (int i = 0; i<N-S.size(); i++){
      |                             ~^~~~~~~~~~~
combo.cpp:32:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |             if (coins > S.size()){
      |                 ~~~~~~^~~~~~~~~~
combo.cpp:33:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |                 for (int i = 0; i<coins-S.size(); i++){
      |                                 ~^~~~~~~~~~~~~~~
combo.cpp:24:13: warning: unused variable 'idx' [-Wunused-variable]
   24 |         int idx = 1;
      |             ^~~

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