Submission #764086

#	Time	Username	Problem	Language	Result	Execution time	Memory
764086		Blagoj	Combo (IOI18_combo)	C++17	0 / 100	64 ms	208 KiB

combo

#include "combo.h"

#include <bits/stdc++.h>

#pragma GCC optimize("Ofast,unroll-loops")

using namespace std;

#define endl '\n'
#define ll long long
#define all(x) x.begin(), x.end()

string guess_sequence(int N) {
    string cur = "ABXY", temp = "";
    char first;
    if (press("AB")) {
        if (press("A")) first = 'A';
        else first = 'B';
    }
    else {
        if (press("X")) first = 'X';
        else first = 'Y';
    }
    cur.erase(find(all(cur), first));
    if (N == 1) return cur;
    while (temp.size() < N - 1) {
        string t = temp + cur[0];
        for (auto x : cur) t += temp + cur[1] + x;
        int v = press(t);
        if (v == temp.size()) temp += cur[2];
        if (v == temp.size() + 1) temp += cur[0];
        if (v == temp.size() + 2) temp += cur[1];
    }
    for (int i = 0; i < 2; i++) {
        temp += cur[i];
        if (press(temp) == N) return temp;
        temp.pop_back();
    }
    temp.push_back(cur[2]);
    return temp;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:26:24: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   26 |     while (temp.size() < N - 1) {
      |            ~~~~~~~~~~~~^~~~~~~
combo.cpp:30:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |         if (v == temp.size()) temp += cur[2];
      |             ~~^~~~~~~~~~~~~~
combo.cpp:31:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |         if (v == temp.size() + 1) temp += cur[0];
      |             ~~^~~~~~~~~~~~~~~~~~
combo.cpp:32:15: 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 (v == temp.size() + 2) temp += cur[1];
      |             ~~^~~~~~~~~~~~~~~~~~

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