Submission #998488

#	Time	Username	Problem	Language	Result	Execution time	Memory
998488		ezzzay	Combo (IOI18_combo)	C++14	100 / 100	20 ms	1548 KiB

combo

#include "combo.h"
#include<bits/stdc++.h>
using namespace std;
#define ff first
#define ss second
#define pb push_back
std::string guess_sequence(int N) {
  string s;
  vector<string>h={"A","B","X","Y"};
  if(press(h[0]+h[1])){
    if(press(h[1]))swap(h[0],h[1]);
  }
  else if(press(h[2])){
    swap(h[0],h[2]);
  }
  else{
    swap(h[0],h[3]);
  }
  s+=h[0];
  if(N==1)return s;
  for(int i=2;i<N;i++){
    string tmp=s+h[1]+s+h[2]+h[1]+s+h[2]+h[2]+s+h[2]+h[3];
    int t=press(tmp);
    if(t==s.size()+1){
      s+=h[1];
    }
    else if(t==s.size()+2){
      s+=h[2];
    }
    else{
      s+=h[3];
    }
  }
  if(press(s+h[1])==s.size()+1){
    s+=h[1];
  }
  else if(press(s+h[2])==s.size()+1){
    s+=h[2];
  }
  else{
    s+=h[3];
  }
  return s;

}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:24:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |     if(t==s.size()+1){
      |        ~^~~~~~~~~~~~
combo.cpp:27:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |     else if(t==s.size()+2){
      |             ~^~~~~~~~~~~~
combo.cpp:34:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |   if(press(s+h[1])==s.size()+1){
      |      ~~~~~~~~~~~~~^~~~~~~~~~~~
combo.cpp:37:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |   else if(press(s+h[2])==s.size()+1){
      |           ~~~~~~~~~~~~~^~~~~~~~~~~~

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