Submission #280414

#	Time	Username	Problem	Language	Result	Execution time	Memory
280414		amalla	Combo (IOI18_combo)	C++17	0 / 100	1 ms	200 KiB

combo

#include "combo.h"
#include<bits/stdc++.h>
     
using namespace std;
     
string guess_sequence(int N) {
    if (press("A")) {
        string M = "BXY", S = "A", control;
        if (N==1) return S;
        for (int i = 0; i<N-1; ++i) {
            control = S+M[0]+M[0];
            control += S+M[0]+M[1];
            control += S+M[0]+M[2];
            control += S+M[1];
            int coins = press(control);
            if (coins==S.size()) S+=M[2];
            else if (coins==S.size()+1) S+=M[1];
            else S+=M[0];
        }
        return S;
    }
    else if (press("B")) {
        string M = "AXY", S = "B", control;
        if (N==1) return S;
        for (int i = 0; i<N-1; ++i) {
            control = S+M[0]+M[0];
            control += S+M[0]+M[1];
            control += S+M[0]+M[2];
            control += S+M[1];
            int coins = press(control);
            if (coins==S.size()) S+=M[2];
            else if (coins==S.size()+1) S+=M[1];
            else S+=M[0];
        }
        return S;
    }
    else if (press("X")) {
        string M = "ABY", S = "X", control;
        if (N==1) return S;
        for (int i = 0; i<N-1; ++i) {
            control = S+M[0]+M[0];
            control += S+M[0]+M[1];
            control += S+M[0]+M[2];
            control += S+M[1];
            int coins = press(control);
            if (coins==S.size()) S+=M[2];
            else if (coins==S.size()+1) S+=M[1];
            else S+=M[0];
        }
        return S;
    }
    else {
        string M = "ABX", S = "Y", control;
        if (N==1) return S;
        for (int i = 0; i<N-1; ++i) {
            control = S+M[0]+M[0];
            control += S+M[0]+M[1];
            control += S+M[0]+M[2];
            control += S+M[1];
            int coins = press(control);
            if (coins==S.size()) S+=M[2];
            else if (coins==S.size()+1) S+=M[1];
            else S+=M[0];
        }
        return S;
    }
    
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:16:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |             if (coins==S.size()) S+=M[2];
      |                 ~~~~~^~~~~~~~~~
combo.cpp:17:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |             else if (coins==S.size()+1) S+=M[1];
      |                      ~~~~~^~~~~~~~~~~~
combo.cpp:31:22: 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 (coins==S.size()) S+=M[2];
      |                 ~~~~~^~~~~~~~~~
combo.cpp:32:27: 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 (coins==S.size()+1) S+=M[1];
      |                      ~~~~~^~~~~~~~~~~~
combo.cpp:46:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |             if (coins==S.size()) S+=M[2];
      |                 ~~~~~^~~~~~~~~~
combo.cpp:47:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |             else if (coins==S.size()+1) S+=M[1];
      |                      ~~~~~^~~~~~~~~~~~
combo.cpp:61:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |             if (coins==S.size()) S+=M[2];
      |                 ~~~~~^~~~~~~~~~
combo.cpp:62:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |             else if (coins==S.size()+1) S+=M[1];
      |                      ~~~~~^~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 95