Submission #142695

#	Time	Username	Problem	Language	Result	Execution time	Memory
142695		triplem5ds	Combo (IOI18_combo)	C++14	100 / 100	54 ms	636 KiB

combo

#include "combo.h"
//#include "grader.cpp"
#include <bits/stdc++.h>
using namespace std;
vector<char> go = {'A','B','X','Y'};

std::string guess_sequence(int N) {
  std::string p = "";
  vector<char> v; 
  if(press("AB")){
    if(press("A")==1)p="A";
    else p = "B";
  } else {
    if(press("X") == 1)p = "X";
    else p = "Y";
  }
  if(N==1)return p;
  go.erase(find(go.begin(),go.end(),p[0]));
  for(int i = 2; i < N; i++){
  	int x = press(p + go[0] + go[0] + p + go[0] + go[1] + p + go[0] + go[2] + p + go[1]);
  	if(x == i + 1)p.push_back(go[0]);
  	else if(x == i)p.push_back(go[1]);
  	else if(x == i - 1)p.push_back(go[2]);
  }
  if(press(p + go[0]) == N)p.push_back(go[0]);
  else if(press(p + go[1]) == N)p.push_back(go[1]);
  else p.push_back(go[2]);
  return p;
}

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