Submission #500060

#	Time	Username	Problem	Language	Result	Execution time	Memory
500060		LucaIlie	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

#include <iostream>
 
#include "combo.h"
 
using namespace std;
 
string guess_sequence( int n ) {
    int i;
    string ans;
 
    for ( i = 1; i <= n; i++ ) {
        if ( (i == 1 || ans[0] != 'A') && press( ans + 'A' ) == i )
            ans += 'A';
        else if ( (i == 1 || ans[0]] != 'B') && press( ans + 'B' ) == i )
            ans += 'B';
        else if ( (i == 1 || ans[0] != 'X') && press( ans + 'X' ) == i )
            ans += 'X';
        else
            ans += 'Y';
    }
 
    return ans;
}

int main() {
    cout << "Hello world!" << endl;
    return 0;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:14:36: error: expected ')' before ']' token
   14 |         else if ( (i == 1 || ans[0]] != 'B') && press( ans + 'B' ) == i )
      |                   ~                ^
      |                                    )
combo.cpp:15:23: error: expected ')' before ';' token
   15 |             ans += 'B';
      |                       ^
      |                       )
combo.cpp:14:17: note: to match this '('
   14 |         else if ( (i == 1 || ans[0]] != 'B') && press( ans + 'B' ) == i )
      |                 ^