Submission #1174076

#	Time	Username	Problem	Language	Result	Execution time	Memory
1174076		wpdmd76	Combo (IOI18_combo)	C++20	Compilation error	0 ms	0 KiB

combo

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define all(v) v.begin(), v.end()


string guess_sequence(int N){
    string a[4] = {"A", "B", "X", "Y"}; 
    string res = "";
    int ix;
    for(int i = 0; i < 3; i++){
        if(press(a[i])){
            res = a[i];
            ix = i;
            break;
        }
    }
    if(res == ""){
        res = a[3];
        ix = 3;
    }

    while(res.size() != N - 1){
        string tmp = "";
        tmp += res + a[(ix + 1) % 4] + a[(ix + 1) % 4];
        tmp += res + a[(ix + 1) % 4] + a[(ix + 2) % 4];
        tmp += res + a[(ix + 1) % 4] + a[(ix + 3) % 4];
        tmp += res + a[(ix + 2) % 4];
        int x = press(tmp);
        if(x == res.size()) res += a[(ix + 3) % 4];
        else if(x ==  res.size() + 1) res += a[(ix + 2) % 4];
        else res += a[(ix + 1) % 4];
    }
    int cnt = 0;
    for(int i = 0; i < 4; i++){
        if(ix == i) continue;
        if(cnt == 2) break;
        if(press(res + a[i]) == N){
            return res + a[i];
        }
        cnt++;
    }
    if(ix == 3) return res + a[2];
    else return res + a[3];
    return res;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:12:12: error: 'press' was not declared in this scope; did you mean 'res'?
   12 |         if(press(a[i])){
      |            ^~~~~
      |            res
combo.cpp:29:17: error: 'press' was not declared in this scope; did you mean 'res'?
   29 |         int x = press(tmp);
      |                 ^~~~~
      |                 res
combo.cpp:38:12: error: 'press' was not declared in this scope; did you mean 'res'?
   38 |         if(press(res + a[i]) == N){
      |            ^~~~~
      |            res