Submission #110941

#	Time	Username	Problem	Language	Result	Execution time	Memory
110941		CodeKracker	Combo (IOI18_combo)	C++14	Compilation error	0 ms	0 KiB

combo

#include "combo.h"
#include<bits/stdc++.h>
#define FOR(i,a,b) for (int i = a; i < b; i++)
#define FORD(i,a,b) for (int i = a; i >= b; i--)
using namespace std;

char gf(){
  int c = press("AB");
  if(c > 0){
    int a = press("A");
    if(a){
      return 'A';
    }else{
      return 'B';
    }
  }else{
    int x = press("X");
    if(x){
      return 'X';
    }else{
      return 'Y';
    }
  }
}

char gl(string ans,vector<char> vec){
  int c = press(ans+vec[0]);
  if(c == ans.length()+1){
    return vec[0];
  }
  c = press(ans+vec[1]);
  if(c == ans.length()+1){
    return vec[1];
  }
  return vec[2];
}

std::string guess_sequence(int n) {
  char f = gf();
  vector<char> rem;
  rem.push_back('A');
  rem.push_back('B');
  rem.push_back('X');
  rem.push_back('Y');
  rem.erase(f);
  string ans = "";
  ans += f;
  FOR(i,1,n-1){
    string cur = ans+rem[0]+ans+rem[1]+rem[0]+ans+rem[1]+rem[1]+ans+rem[1]+rem[2];
    int c = press(cur);
    if(c == ans.length()){
      ans += rem[2];
    }else if(c == ans.length()+1){
      ans += rem[0];
    }else{
      ans += rem[1];
    }
  }
  char l = gl(ans,rem);
  ans += l;
  return ans;
}

Compilation message (stderr)

combo.cpp: In function 'char gl(std::string, std::vector<char>)':
combo.cpp:28:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |   if(c == ans.length()+1){
      |      ~~^~~~~~~~~~~~~~~~~
combo.cpp:32:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |   if(c == ans.length()+1){
      |      ~~^~~~~~~~~~~~~~~~~
combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:45:14: error: no matching function for call to 'std::vector<char>::erase(char&)'
   45 |   rem.erase(f);
      |              ^
In file included from /usr/include/c++/10/vector:67,
                 from /usr/include/c++/10/queue:61,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:86,
                 from combo.cpp:2:
/usr/include/c++/10/bits/stl_vector.h:1430:7: note: candidate: 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::erase(std::vector<_Tp, _Alloc>::const_iterator) [with _Tp = char; _Alloc = std::allocator<char>; std::vector<_Tp, _Alloc>::iterator = std::vector<char>::iterator; std::vector<_Tp, _Alloc>::const_iterator = std::vector<char>::const_iterator]'
 1430 |       erase(const_iterator __position)
      |       ^~~~~
/usr/include/c++/10/bits/stl_vector.h:1430:28: note:   no known conversion for argument 1 from 'char' to 'std::vector<char>::const_iterator'
 1430 |       erase(const_iterator __position)
      |             ~~~~~~~~~~~~~~~^~~~~~~~~~
/usr/include/c++/10/bits/stl_vector.h:1457:7: note: candidate: 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::erase(std::vector<_Tp, _Alloc>::const_iterator, std::vector<_Tp, _Alloc>::const_iterator) [with _Tp = char; _Alloc = std::allocator<char>; std::vector<_Tp, _Alloc>::iterator = std::vector<char>::iterator; std::vector<_Tp, _Alloc>::const_iterator = std::vector<char>::const_iterator]'
 1457 |       erase(const_iterator __first, const_iterator __last)
      |       ^~~~~
/usr/include/c++/10/bits/stl_vector.h:1457:7: note:   candidate expects 2 arguments, 1 provided
combo.cpp:51:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |     if(c == ans.length()){
      |        ~~^~~~~~~~~~~~~~~
combo.cpp:53:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |     }else if(c == ans.length()+1){
      |              ~~^~~~~~~~~~~~~~~~~