Submission #1007013

#	Time	Username	Problem	Language	Result	Execution time	Memory
1007013		KindaNameless	Combo (IOI18_combo)	C++14	Compilation error	0 ms	0 KiB

combo

#include "combo.h"
using namespace std;

string guess_sequence(int N){
    string answer = "";
    if(press("AB")){
        if(press("A")){
            answer += "A";
        }
        else{
            answer += "B";
        }
    }
    else{
        if(press("X")){
            answer += "X";
        }
        else{
            answer += "Y";
        }
    }

    vector<char> cand;
    if(answer[0] != 'A')cand.push_back('A');
    if(answer[0] != 'B')cand.push_back('B');
    if(answer[0] != 'X')cand.push_back('X');
    if(answer[0] != 'Y')cand.push_back('Y');

    string g;
    for(int i = 1; i <= N - 2; ++i){
        g = answer + cand[0] + cand[0] + answer + cand[0] + cand[1] + answer + cand[0] + cand[2] + answer + cand[1];

        int val = press(g);
        if(val == (int)answer.size() + 2){
            answer += cand[0];
        }
        else if(val == (int)answer.size() + 1){
            answer += cand[1];
        }
        else{
            answer += cand[2];
        }
    }

    g = answer + cand[0] + answer + cand[1];
    if(press(g) == N){
        g = answer + cand[0];
        if(press(g) == N){
            answer += cand[0];
        }
        else{
            answer += cand[1];
        }
    }
    else{
        answer += cand[2];
    }

    return answer;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:23:5: error: 'vector' was not declared in this scope
   23 |     vector<char> cand;
      |     ^~~~~~
combo.cpp:2:1: note: 'std::vector' is defined in header '<vector>'; did you forget to '#include <vector>'?
    1 | #include "combo.h"
  +++ |+#include <vector>
    2 | using namespace std;
combo.cpp:23:12: error: expected primary-expression before 'char'
   23 |     vector<char> cand;
      |            ^~~~
combo.cpp:24:25: error: 'cand' was not declared in this scope; did you mean 'rand'?
   24 |     if(answer[0] != 'A')cand.push_back('A');
      |                         ^~~~
      |                         rand
combo.cpp:25:25: error: 'cand' was not declared in this scope; did you mean 'rand'?
   25 |     if(answer[0] != 'B')cand.push_back('B');
      |                         ^~~~
      |                         rand
combo.cpp:26:25: error: 'cand' was not declared in this scope; did you mean 'rand'?
   26 |     if(answer[0] != 'X')cand.push_back('X');
      |                         ^~~~
      |                         rand
combo.cpp:27:25: error: 'cand' was not declared in this scope; did you mean 'rand'?
   27 |     if(answer[0] != 'Y')cand.push_back('Y');
      |                         ^~~~
      |                         rand
combo.cpp:31:22: error: 'cand' was not declared in this scope; did you mean 'rand'?
   31 |         g = answer + cand[0] + cand[0] + answer + cand[0] + cand[1] + answer + cand[0] + cand[2] + answer + cand[1];
      |                      ^~~~
      |                      rand
combo.cpp:45:18: error: 'cand' was not declared in this scope; did you mean 'rand'?
   45 |     g = answer + cand[0] + answer + cand[1];
      |                  ^~~~
      |                  rand