Submission #941209

#	Time	Username	Problem	Language	Result	Execution time	Memory
941209		FIFI_cpp	Combo (IOI18_combo)	C++17	100 / 100	14 ms	1876 KiB

combo

#include <iostream>
#include <vector>
#include <algorithm>
#include <numeric>
#include <cstdlib>
#include <cmath>
#include <queue>
#include <stack>
#include <deque>
#include <fstream>
#include <iterator>
#include <set>
#include <map>
#include <unordered_map>
#include <iomanip>
#include <cctype>
#include <string>
#include <cassert>
#include <set>
#include <bitset>
#include <unordered_set>
#include "combo.h"
using ll = long long;
#define pb push_back
#define all(a) a.begin(),a.end()
#define fast ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
// xcode cant include bits/stdc++.h
using namespace std;
//ifstream fin ("fenceplan.in");
//ofstream fout ("fenceplan.out");
string guess_sequence(int N) {
    string res = "";
    string chars = "ABXY";
    if (press("AB") >= 1)
    {
        if (press("A") == 1)
        {
            res += "A";
            chars.erase(chars.begin());
        }
        else
        {
            chars.erase(chars.begin() + 1);
            res += "B";
        }
    }
    else
    {
        if (press("X") == 1)
        {
            res += "X";
            chars.erase(chars.begin() + 2);
        }
        else
        {
            res += "Y";
            chars.erase(chars.begin() + 3);
        }
    }
    for (int i = 1;i < N - 1;i++)
    {
        string ask = "";
        char askc = chars[0];
        for (int k = 0;k < 3;k++)
        {
            ask += res + askc + chars[k];
        }
        ask += res + chars[1];
        int x = press(ask);
        if (x == res.size() + 2)
            res += chars[0];
        else if (x == res.size() + 1)
            res += chars[1];
        else
            res += chars[2];
    }
    if (N >= 2)
    {
        if (press(res + chars[0]) == res.size() + 1)
        {
            res += chars[0];
        }
        else if (press(res + chars[1]) == res.size() + 1)
            res += chars[1];
        else
            res += chars[2];
    }
  return res;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:70:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |         if (x == res.size() + 2)
      |             ~~^~~~~~~~~~~~~~~~~
combo.cpp:72:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   72 |         else if (x == res.size() + 1)
      |                  ~~^~~~~~~~~~~~~~~~~
combo.cpp:79:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   79 |         if (press(res + chars[0]) == res.size() + 1)
      |             ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
combo.cpp:83:40: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   83 |         else if (press(res + chars[1]) == res.size() + 1)
      |                  ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~

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