Submission #629833

#	Time	Username	Problem	Language	Result	Execution time	Memory
629833		airths	Combo (IOI18_combo)	C++17	10 / 100	95 ms	588 KiB

combo

#include "combo.h"

std::string guess_sequence(int N) {
  std::string p = "";
  int cur=0;
  char an[]={'A', 'B', 'X', 'Y'};
  for (int i = 0; i < N; ++i) {
    std::string jk[]={p+'A', p+'B', p+'X', p+'Y'};
    for (int j=0; j<4; j++){
      int c=press(jk[j]);
      if (c==cur+1){
        cur++;
        p+=an[j];
      }
    }
  }
  return p;
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 95