Submission #675755

#	Time	Username	Problem	Language	Result	Execution time	Memory
675755		GGOSHAB	Combo (IOI18_combo)	C++14	Compilation error	0 ms	0 KiB

combo

#include <iostream>
#include <vector>
#include "combo.h"

#define PI 3.14159265359

using namespace std;

typedef long long ll;
typedef unsigned long long ull;

typedef vector<int> bigInt;

const ull INF = -1;

int press(const string &s);

string guess_sequence(int n) {
    string ans;
    ans.reserve(n);
    if (press("AB")) {
        if (press("A"))
            ans.push_back('A');
        else
            ans.push_back('B');
    }
    else {
        if (press("X"))
            ans.push_back('X');
        else
            ans.push_back('Y');
    }

    char ex = ans[0];
    string t, letters = "ABXY", tl;

    for (char c : letters)
        if (c != ex)
            tl.push_back(c);


    t.reserve(4 * n);
    for (int i = 2; i <= n; ++i) {
        for (int i = 0; i < 3; ++i) {
                t += ans;
                t.push_back(tl[i]);
        }
        int size = t.length() / 3;
        if (press(t.substr(0, size << 1))) {
            if (press(t.substr(0, size)))
                ans.push_back(tl[0]);
            else
                ans.push_back(tl[1]);
        }
        else {
            ans.push_back(tl[2]);
        }
    }
    
    return ans;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:21:19: error: call of overloaded 'press(const char [3])' is ambiguous
   21 |     if (press("AB")) {
      |                   ^
In file included from combo.cpp:3:
combo.h:7:5: note: candidate: 'int press(std::string)'
    7 | int press(std::string p);
      |     ^~~~~
combo.cpp:16:5: note: candidate: 'int press(const string&)'
   16 | int press(const string &s);
      |     ^~~~~
combo.cpp:22:22: error: call of overloaded 'press(const char [2])' is ambiguous
   22 |         if (press("A"))
      |                      ^
In file included from combo.cpp:3:
combo.h:7:5: note: candidate: 'int press(std::string)'
    7 | int press(std::string p);
      |     ^~~~~
combo.cpp:16:5: note: candidate: 'int press(const string&)'
   16 | int press(const string &s);
      |     ^~~~~
combo.cpp:28:22: error: call of overloaded 'press(const char [2])' is ambiguous
   28 |         if (press("X"))
      |                      ^
In file included from combo.cpp:3:
combo.h:7:5: note: candidate: 'int press(std::string)'
    7 | int press(std::string p);
      |     ^~~~~
combo.cpp:16:5: note: candidate: 'int press(const string&)'
   16 | int press(const string &s);
      |     ^~~~~
combo.cpp:49:41: error: call of overloaded 'press(std::__cxx11::basic_string<char>)' is ambiguous
   49 |         if (press(t.substr(0, size << 1))) {
      |                                         ^
In file included from combo.cpp:3:
combo.h:7:5: note: candidate: 'int press(std::string)'
    7 | int press(std::string p);
      |     ^~~~~
combo.cpp:16:5: note: candidate: 'int press(const string&)'
   16 | int press(const string &s);
      |     ^~~~~
combo.cpp:50:40: error: call of overloaded 'press(std::__cxx11::basic_string<char>)' is ambiguous
   50 |             if (press(t.substr(0, size)))
      |                                        ^
In file included from combo.cpp:3:
combo.h:7:5: note: candidate: 'int press(std::string)'
    7 | int press(std::string p);
      |     ^~~~~
combo.cpp:16:5: note: candidate: 'int press(const string&)'
   16 | int press(const string &s);
      |     ^~~~~