Submission #1243007

#	Time	Username	Problem	Language	Result	Execution time	Memory
1243007		Circling	Combo (IOI18_combo)	C++20	Compilation error	0 ms	0 KiB

combo

#include <iostream>
#include <iomanip>
#include <utility>
#include <vector>
#include <set>
#include <map>
#include <queue>
#include <stack>
#include <algorithm>
#include <cmath>
#include <cstdint>
using namespace std;

/*
int press(string p){
    cout << p << endl;
    int k;
    cin >> k;
    return k;
}*/


string guess_sequence(int n){
    string ans, comb, c1, c2, c3;
    char first;
    if (press("AB") > 0) first = "BA"[press("A")];
    else first = "XY"[press("Y")];
    c1 = "AB"[first < 'B'];
    c2 = "BX"[first < 'X'];
    c3 = "XY"[first < 'Y'];
    ans += first;
    comb = c1 + c2 + c3;
    for (int i = 1; i < n - 1; i++) ans += comb[press(ans + c2 + ans + c3 + c1 + ans + c3 + c2 + ans + c3 + c3) - i];
    if (press(ans + c1) == n) return ans + c1;
    else if (press(ans + c2) == n) return ans + c2;
    else return ans + c3;
}

/*
int main(){
    cout << guess_sequence(5) << endl;
}
*/

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:26:9: error: 'press' was not declared in this scope
   26 |     if (press("AB") > 0) first = "BA"[press("A")];
      |         ^~~~~
combo.cpp:33:49: error: 'press' was not declared in this scope
   33 |     for (int i = 1; i < n - 1; i++) ans += comb[press(ans + c2 + ans + c3 + c1 + ans + c3 + c2 + ans + c3 + c3) - i];
      |                                                 ^~~~~
combo.cpp:34:9: error: 'press' was not declared in this scope
   34 |     if (press(ans + c1) == n) return ans + c1;
      |         ^~~~~
combo.cpp:37:1: warning: control reaches end of non-void function [-Wreturn-type]
   37 | }
      | ^