Submission #102454

#	Time	Username	Problem	Language	Result	Execution time	Memory
102454		muradeyn	Combo (IOI18_combo)	C++14	100 / 100	48 ms	572 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
 
using namespace std;
 
string guess_sequence(int N) {
    string res;
    vector<char>v;
    if (press("AB") >= 1) {
        if (press("A") == 1)res = "A";
        else res = "B";
    }
    else {
        if (press("X") == 1)res = "X";
        else res = "Y";
    }
    if (res[0] != 'X')v.push_back('X');
    if (res[0] != 'Y')v.push_back('Y');
    if (res[0] != 'A')v.push_back('A');
    if (res[0] != 'B')v.push_back('B');
    while (res.length() < N) {
        if (res.length() == N - 1) {
            if (press(res + v[0]) == N)res += v[0];
            else if (press(res + v[1]) == N)res += v[1];
            else res += v[2];
            continue;
        }
        string query = res + v[0] + res + v[1] + v[0] + res + v[1] + v[1] + res + v[1] + v[2];
        //cout<<query<<endl;
        int val = press(query);
        //cout<<val<<endl;
        if (val == res.length()+2)res += v[1];
        else if (val == res.length()+1)res += v[0];
        else res += v[2];
    }
    return res;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:21:25: 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 (res.length() < N) {
      |            ~~~~~~~~~~~~~^~~
combo.cpp:22:26: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   22 |         if (res.length() == N - 1) {
      |             ~~~~~~~~~~~~~^~~~~~~~
combo.cpp:32:17: 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 (val == res.length()+2)res += v[1];
      |             ~~~~^~~~~~~~~~~~~~~~~
combo.cpp:33:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |         else if (val == res.length()+1)res += v[0];
      |                  ~~~~^~~~~~~~~~~~~~~~~

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