Submission #875687

#	Time	Username	Problem	Language	Result	Execution time	Memory
875687		nasir_bashirov	Combo (IOI18_combo)	C++11	100 / 100	11 ms	1908 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) {
    string res = "";
    vector<string> v;
    if(press("AB")){
        if(press("A"))  res = "A", v = {"B", "X", "Y"};
        else    res = "B", v = {"A", "X", "Y"};
    }
    else{
        if(press("X"))  res = "X", v = {"A", "B", "Y"};
        else res += "Y", v = {"A", "B", "X"};
    }
    if(n == 1)return res;
    for(int i = 1; i <= n - 2; i++){
        string cur = res + v[0] + v[0] + res + v[0] + v[1] + res + v[0] + v[2] + res + v[1];
        int q = press(cur);
        if(q == res.size() + 2)   res += v[0];
        else if(q == res.size() + 1)  res += v[1];
        else    res += v[2];
    }
    if(press(res + "A" + res + "B") == res.size() + 1){
        if(press(res + "A") == res.size() + 1)  res += "A";
        else    res += "B";
    }
    else{
        if(press(res + "X") == res.size() + 1)  res += "X";
        else res += "Y";
    }
    return res;
}


/*
    res + BX
    res + BB
    res + BY
    res + X
*/

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:36:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |         if(q == res.size() + 2)   res += v[0];
      |            ~~^~~~~~~~~~~~~~~~~
combo.cpp:37:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |         else if(q == res.size() + 1)  res += v[1];
      |                 ~~^~~~~~~~~~~~~~~~~
combo.cpp:40:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |     if(press(res + "A" + res + "B") == res.size() + 1){
      |        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
combo.cpp:41:29: 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(press(res + "A") == res.size() + 1)  res += "A";
      |            ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
combo.cpp:45:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |         if(press(res + "X") == res.size() + 1)  res += "X";
      |            ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~

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