Submission #1006693

#	Time	Username	Problem	Language	Result	Execution time	Memory
1006693		devariaota	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
using namespace std;
#define all(x) x.begin(), x.end()

string guess_sequence(int n) {
  string S = "ABXY";
  for (char a = 0; a < 4; a++) for (char b = 0; b <4; b++) for (char c = 0; c < 4; c++) for (char d = 0; d < 4; d++) {
    string res;
    res += S[a] + S[b] + S[c] + S[d];
    int x = press(res);
    if (x == 4) {
      cout << res;
      return;
    }
  }
  
}

// string guess_sequence(int N) {
//   string permu = "AAAABBBBXXXXYYYY";
//   do {
//     cout << permu << endl;
//   } while (next_permutation(all(permu)));
// }

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:14:7: error: return-statement with no value, in function returning 'std::string' {aka 'std::__cxx11::basic_string<char>'} [-fpermissive]
   14 |       return;
      |       ^~~~~~
combo.cpp:7:14: warning: control reaches end of non-void function [-Wreturn-type]
    7 |   string S = "ABXY";
      |              ^~~~~~