Submission #303972

#	Time	Username	Problem	Language	Result	Execution time	Memory
303972		Gilgamesh	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

#include "combo.h"
using namespace std;
#include <string>
#include <vector>
#include <set>

string guess_sequence(int N) {
    string ans = "";
    set<string> strs = {"A", "B", "X", "Y"};
    int ab = press("AB");
    if(ab >= 1){
        int a = press("A");
        if(a == 1){
            ans = "A";
        }
        else ans = "B";
    }
    else{
        int x = press("X");
        if(x == 1){
            ans = "X";
        }
        else ans = "Y";
    }
    strs.erase(ans);
    vector<string> left;
    for(string s : strs){
        left.emplace_back(s);
    }
    for(int i = 1; i < N - 1; ++i){
        int cur = press(ans + left[1] + ans + left[2] + left[0] + ans + left[2] + left[1] + ans + left[2] + left[2]);
        if(cur == i){
            ans += left[0];
        }
        else if(cur == i + 1){
            ans += left[1];
        }
        else ans += left[2];
    }
    if(press(ans + left[0])==n) ret += left[0];
    else if(press(ans + left[1]) == n) ret += left[1];
    else ret += left[2];
    return ans;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:40:30: error: 'n' was not declared in this scope
   40 |     if(press(ans + left[0])==n) ret += left[0];
      |                              ^
combo.cpp:40:33: error: 'ret' was not declared in this scope
   40 |     if(press(ans + left[0])==n) ret += left[0];
      |                                 ^~~
combo.cpp:41:40: error: 'ret' was not declared in this scope
   41 |     else if(press(ans + left[1]) == n) ret += left[1];
      |                                        ^~~
combo.cpp:42:10: error: 'ret' was not declared in this scope
   42 |     else ret += left[2];
      |          ^~~