Submission #855749

#	Time	Username	Problem	Language	Result	Execution time	Memory
855749		IS_Rushdi	Combo (IOI18_combo)	C++17	100 / 100	11 ms	1756 KiB

combo

// #include <iostream>
#include "combo.h"
using namespace std;

// int press(string x){
//     return 0;
// }
string guess_sequence(int N) {
  string x = "ABXY";
  string S = ""; 
  int cost = press("AB");
  if(cost > 0){
    cost = press("A");
    if(cost == 1) S += 'A';
    else S += 'B';
  }else{
    cost = press("X");
    if(cost == 1) S += 'X';
    else S += 'Y';
  }
  if(S[0] == 'A') x = "BXY";
  else if(S[0] == 'B') x = "AXY";
  else if(S[0] == 'X') x = "ABY";
  else x = "ABX";

  for(int i = 1; i < N-1; i++){
    string p = "";
    for(int j = 0; j < 3; j++) p+= S + x[0] + x[j];
    p+= S + x[1];
    cost = press(p);
    if(cost-i == 2) S += x[0];
    else if(cost-i == 1) S += x[1];
    else S += x[2];
  }
  if(N > 1){
    cost = press(S+x[0]);
    if(cost == N){
        S += x[0];
    }else{
        cost = press(S+x[1]);
        if(cost == N){
            S += x[1];
        }else{
            S+=x[2];
        }
        }
    }
  return S;
}
// int main(){

// }

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