Submission #646098

#	Time	Username	Problem	Language	Result	Execution time	Memory
646098		sandry24	Combo (IOI18_combo)	C++17	100 / 100	45 ms	560 KiB

combo

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef vector<int> vi;
typedef pair<int, int> pi;
#define pb push_back
#define mp make_pair
#define f first
#define s second
     
int press(std::string p);
vector<char> chars = {'A', 'B', 'X', 'Y'};
 
string guess_sequence(int n){
    string temp = "";
    while(temp.size() != n){
        if(temp.size() == 0){
            int ans = press("AB");
            if(ans > 0){
                if(press("A"))
                    temp += "A";
                else temp += "B";
            } else {
                if(press("X"))
                    temp += "X";
                else temp += "Y";
            }
            chars.erase(find(chars.begin(), chars.end(), temp[0]));
        } else if(temp.size() < n-1){
            string temp2 = temp + chars[1] + temp + chars[2] + chars[0] + temp + chars[2] + chars[1]
                + temp + chars[2] + chars[2];
            int ans = press(temp2) - temp.size();
            temp += chars[ans];
        } else {
            int ans = 2;
            if(press(temp + chars[0]) == n)
                ans = 0;
            else if(press(temp + chars[1]) == n)
                ans = 1;
            temp += chars[ans];
        }
    }
    return temp;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:17:23: 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(temp.size() != n){
      |           ~~~~~~~~~~~~^~~~
combo.cpp:30:31: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   30 |         } else if(temp.size() < n-1){
      |                   ~~~~~~~~~~~~^~~~~

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