Submission #413799

#	Time	Username	Problem	Language	Result	Execution time	Memory
413799		illyakr	Combo (IOI18_combo)	C++14	100 / 100	40 ms	596 KiB

combo

#include "combo.h"
using namespace std;

// A B X Y
string guess_sequence(int N) {
    string ans = "";
    if (press("AB") >= 1) {
        if (press("A") == 1)ans = "A";
        else ans = "B";
    } else {
        if (press("X") == 1)ans = "X";
        else ans = "Y";
    }
    if (N == 1)return ans;


    while (ans.size() + 1 < N) {
        if (ans[0] == 'A') {
            int c = press(ans + "B" + ans + "XB" + ans + "XX" + ans + "XY");
            if (c == ans.size())ans.push_back('Y');
            else if (c == ans.size() + 1)ans.push_back('B');
            else if (c == ans.size() + 2)ans.push_back('X');
            continue;
        }
        if (ans[0] == 'B') {
            int c = press(ans + "A" + ans + "XA" + ans + "XX" + ans + "XY");
            if (c == ans.size())ans.push_back('Y');
            else if (c == ans.size() + 1)ans.push_back('A');
            else if (c == ans.size() + 2)ans.push_back('X');
            continue;
        }
        if (ans[0] == 'X') {
            int c = press(ans + "B" + ans + "AB" + ans + "AA" + ans + "AY");
            if (c == ans.size())ans.push_back('Y');
            else if (c == ans.size() + 1)ans.push_back('B');
            else if (c == ans.size() + 2)ans.push_back('A');
            continue;
        }
        if (ans[0] == 'Y') {
            int c = press(ans + "B" + ans + "AB" + ans + "AA" + ans + "AX");
            if (c == ans.size())ans.push_back('X');
            else if (c == ans.size() + 1)ans.push_back('B');
            else if (c == ans.size() + 2)ans.push_back('A');
            continue;
        }
    }
    if (press(ans + "A" + ans + "B") == ans.size() + 1) {
        if (press(ans + "A") == ans.size() + 1)ans.push_back('A');
        else ans.push_back('B');
    } else {
        if (press(ans + "X") == ans.size() + 1)ans.push_back('X');
        else ans.push_back('Y');
    }
    return ans;
}
/**
*/

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:17:27: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   17 |     while (ans.size() + 1 < N) {
      |            ~~~~~~~~~~~~~~~^~~
combo.cpp:20:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |             if (c == ans.size())ans.push_back('Y');
      |                 ~~^~~~~~~~~~~~~
combo.cpp:21:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |             else if (c == ans.size() + 1)ans.push_back('B');
      |                      ~~^~~~~~~~~~~~~~~~~
combo.cpp:22:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |             else if (c == ans.size() + 2)ans.push_back('X');
      |                      ~~^~~~~~~~~~~~~~~~~
combo.cpp:27:19: 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 (c == ans.size())ans.push_back('Y');
      |                 ~~^~~~~~~~~~~~~
combo.cpp:28:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |             else if (c == ans.size() + 1)ans.push_back('A');
      |                      ~~^~~~~~~~~~~~~~~~~
combo.cpp:29:24: 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 (c == ans.size() + 2)ans.push_back('X');
      |                      ~~^~~~~~~~~~~~~~~~~
combo.cpp:34:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |             if (c == ans.size())ans.push_back('Y');
      |                 ~~^~~~~~~~~~~~~
combo.cpp:35:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |             else if (c == ans.size() + 1)ans.push_back('B');
      |                      ~~^~~~~~~~~~~~~~~~~
combo.cpp:36:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |             else if (c == ans.size() + 2)ans.push_back('A');
      |                      ~~^~~~~~~~~~~~~~~~~
combo.cpp:41:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |             if (c == ans.size())ans.push_back('X');
      |                 ~~^~~~~~~~~~~~~
combo.cpp:42:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |             else if (c == ans.size() + 1)ans.push_back('B');
      |                      ~~^~~~~~~~~~~~~~~~~
combo.cpp:43:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |             else if (c == ans.size() + 2)ans.push_back('A');
      |                      ~~^~~~~~~~~~~~~~~~~
combo.cpp:47:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |     if (press(ans + "A" + ans + "B") == ans.size() + 1) {
      |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
combo.cpp:48:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |         if (press(ans + "A") == ans.size() + 1)ans.push_back('A');
      |             ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
combo.cpp:51:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |         if (press(ans + "X") == ans.size() + 1)ans.push_back('X');
      |             ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~

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