Submission #984511

#	Time	Username	Problem	Language	Result	Execution time	Memory
984511		kachim2	Combo (IOI18_combo)	C++14	0 / 100	30 ms	7344 KiB

combo

#include "combo.h"
#include <iostream>

std::string guess_sequence(int N) {
  
  std::string S = "";
  if (press("AB") != 0) {
    if (press("A") == 1) {
      S = 'A';
    }
    else {
      S='B';
    }
  } else {
    if (press("X") == 1) {
      S = 'X';
    }
    else {
      S = 'Y';
      
    }
  }
  std::string A = "A", B = "B", C = "X";
  switch (S[0]) {
  case 'A':
    A = "Y";
    break;
  case 'B':
    B = "Y";
    break;
  case 'X':
    C = "Y";
    break;
  default:
    break;
  };
  for (int i = 1; i < N - 1; i++) {
    std::cerr << S + A + S + B + C + S + B + A << '\n';
    int ans = press(S + A + S + B + C + S + B + A);
    if (ans == i+1) {
      S+=A;
    } else if (ans == i+2){
      S+=B;
    } else {
      S+=C;
    }
  }
  if(N!=1)
  if (press(S + A) == S.size()) {
    if (press(S + B) == S.size()) {
      S+= C;
    } else {
      S+=B;
    }
  } else {
    S+=A;
  }
  std::cerr << S;
  return S;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:49:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |   if (press(S + A) == S.size()) {
      |       ~~~~~~~~~~~~~^~~~~~~~~~~
combo.cpp:50:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   50 |     if (press(S + B) == S.size()) {
      |         ~~~~~~~~~~~~~^~~~~~~~~~~
combo.cpp:48:5: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else]
   48 |   if(N!=1)
      |     ^

• Subtask 1: 0 / 5
• Subtask 2: 0 / 95