Submission #875617

#	Time	Username	Problem	Language	Result	Execution time	Memory
875617		nasir_bashirov	Combo (IOI18_combo)	C++11	5 / 100	31 ms	952 KiB

combo

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

#define db long double
#define ll long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define vi vector<int>
#define vl vector<ll>
#define vii vector<pii>
#define vll vector<pll>
#define endl '\n'
#define all(x) x.begin(), x.end()
#define fastio\
    ios_base::sync_with_stdio(0);\
    cin.tie(0);\
    cout.tie(0)\


string guess_sequence(int n) {
    srand(time(0));
    string res = "";
    set<string> st = {"A", "B", "X", "Y"};
    for(string s : {"A", "B", "X", "Y"}){
        if(press(s)){
            res = s;
            st.erase(s);
            break;
        }
    }
    for(int i = 2; i <= n; i++){
        while(true){
            int ind = rand() % 3;
            auto it = st.begin();
            while(ind--)    it++;
            if(press(res + *it) == res.size() + 1){
                res += *it;
                break;
            }
        }
    }
    return res;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:37:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |             if(press(res + *it) == res.size() + 1){
      |                ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~

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