# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
448408 | power_zero1 | Combo (IOI18_combo) | C++17 | Compilation error | 0 ms | 0 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "combo.h"
using namespace std;
std::string guess_sequence(int N) {
string ANS;
int prev = 0;
string m[] = {"A", "B", "X", "Y"};
int mx = 0;
string mxChar;
for (int i = 0; i < N; i++) {
for (string j : m) {
if (i && ANS[0] == j)
continue;
int score = press(ANS+j);
if (score > mx) {
mx = score;
mxChar = j;
}
}
ANS.push_back(mxChar);
}
return ANS;
}
Compilation message (stderr)
combo.cpp: In function 'std::string guess_sequence(int)': combo.cpp:13:29: error: no match for 'operator==' (operand types are '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} and 'std::string' {aka 'std::__cxx11::basic_string<char>'}) 13 | if (i && ANS[0] == j) In file included from /usr/include/c++/10/bits/stl_algobase.h:64, from /usr/include/c++/10/bits/char_traits.h:39, from /usr/include/c++/10/string:40, from combo.h:3, from combo.cpp:1: /usr/include/c++/10/bits/stl_pair.h:466:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator==(const std::pair<_T1, _T2>&, const std::pair<_T1, _T2>&)' 466 | operator==(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y) | ^~~~~~~~ /usr/include/c++/10/bits/stl_pair.h:466:5: note: template argument deduction/substitution failed: combo.cpp:13:32: note: mismatched types 'const std::pair<_T1, _T2>' and '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} 13 | if (i && ANS[0] == j) | ^ In file included from /usr/include/c++/10/bits/stl_algobase.h:67, from /usr/include/c++/10/bits/char_traits.h:39, from /usr/include/c++/10/string:40, from combo.h:3, from combo.cpp:1: /usr/include/c++/10/bits/stl_iterator.h:360:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator==(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_Iterator>&)' 360 | operator==(const reverse_iterator<_Iterator>& __x, | ^~~~~~~~ /usr/include/c++/10/bits/stl_iterator.h:360:5: note: template argument deduction/substitution failed: combo.cpp:13:32: note: mismatched types 'const std::reverse_iterator<_Iterator>' and '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} 13 | if (i && ANS[0] == j) | ^ In file included from /usr/include/c++/10/bits/stl_algobase.h:67, from /usr/include/c++/10/bits/char_traits.h:39, from /usr/include/c++/10/string:40, from combo.h:3, from combo.cpp:1: /usr/include/c++/10/bits/stl_iterator.h:398:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator==(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_IteratorR>&)' 398 | operator==(const reverse_iterator<_IteratorL>& __x, | ^~~~~~~~ /usr/include/c++/10/bits/stl_iterator.h:398:5: note: template argument deduction/substitution failed: combo.cpp:13:32: note: mismatched types 'const std::reverse_iterator<_Iterator>' and '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} 13 | if (i && ANS[0] == j) | ^ In file included from /usr/include/c++/10/bits/stl_algobase.h:67, from /usr/include/c++/10/bits/char_traits.h:39, from /usr/include/c++/10/string:40, from combo.h:3, from combo.cpp:1: /usr/include/c++/10/bits/stl_iterator.h:1427:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator==(const std::move_iterator<_IteratorL>&, const std::move_iterator<_IteratorR>&)' 1427 | operator==(const move_iterator<_IteratorL>& __x, | ^~~~~~~~ /usr/include/c++/10/bits/stl_iterator.h:1427:5: note: template argument deduction/substitution failed: combo.cpp:13:32: note: mismatched types 'const std::move_iterator<_IteratorL>' and '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} 13 | if (i && ANS[0] == j) | ^ In file included from /usr/include/c++/10/bits/stl_algobase.h:67, from /usr/include/c++/10/bits/char_traits.h:39, from /usr/include/c++/10/string:40, from combo.h:3, from combo.cpp:1: /usr/include/c++/10/bits/stl_iterator.h:1495:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator==(const std::move_iterator<_IteratorL>&, const std::move_iterator<_IteratorL>&)' 1495 | operator==(const move_iterator<_Iterator>& __x, | ^~~~~~~~ /usr/include/c++/10/bits/stl_iterator.h:1495:5: note: template argument deduction/substitution failed: combo.cpp:13:32: note: mismatched types 'const std::move_iterator<_IteratorL>' and '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} 13 | if (i && ANS[0] == j) | ^ In file included from /usr/include/c++/10/bits/char_traits.h:40, from /usr/include/c++/10/string:40, from combo.h:3, from combo.cpp:1: /usr/include/c++/10/bits/postypes.h:222:5: note: candidate: 'template<class _StateT> bool std::operator==(const std::fpos<_StateT>&, const std::fpos<_StateT>&)' 222 | operator==(const fpos<_StateT>& __lhs, const fpos<_StateT>& __rhs) | ^~~~~~~~ /usr/include/c++/10/bits/postypes.h:222:5: note: template argument deduction/substitution failed: combo.cpp:13:32: note: mismatched types 'const std::fpos<_StateT>' and '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} 13 | if (i && ANS[0] == j) | ^ In file included from /usr/include/c++/10/string:41, from combo.h:3, from combo.cpp:1: /usr/include/c++/10/bits/allocator.h:206:5: note: candidate: 'template<class _T1, class _T2> bool std::operator==(const std::allocator<_CharT>&, const std::allocator<_T2>&)' 206 | operator==(const allocator<_T1>&, const allocator<_T2>&) | ^~~~~~~~ /usr/include/c++/10/bits/allocator.h:206:5: note: template argument deduction/substitution failed: combo.cpp:13:32: note: mismatched types 'const std::allocator<_CharT>' and '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} 13 | if (i && ANS[0] == j) | ^ In file included from /usr/include/c++/10/bits/basic_string.h:48, from /usr/include/c++/10/string:55, from combo.h:3, from combo.cpp:1: /usr/include/c++/10/string_view:490:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator==(std::basic_string_view<_CharT, _Traits>, std::basic_string_view<_CharT, _Traits>)' 490 | operator==(basic_string_view<_CharT, _Traits> __x, | ^~~~~~~~ /usr/include/c++/10/string_view:490:5: note: template argument deduction/substitution failed: combo.cpp:13:32: note: mismatched types 'std::basic_string_view<_CharT, _Traits>' and 'char' 13 | if (i && ANS[0] == j) | ^ In file included from /usr/include/c++/10/bits/basic_string.h:48, from /usr/include/c++/10/string:55, from combo.h:3, from combo.cpp:1: /usr/include/c++/10/string_view:496:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator==(std::basic_string_view<_CharT, _Traits>, std::__type_identity_t<std::basic_string_view<_CharT, _Traits> >)' 496 | operator==(basic_string_view<_CharT, _Traits> __x, | ^~~~~~~~ /usr/include/c++/10/string_view:496:5: note: template argument deduction/substitution failed: combo.cpp:13:32: note: mismatched types 'std::basic_string_view<_CharT, _Traits>' and 'char' 13 | if (i && ANS[0] == j) | ^ In file included from /usr/include/c++/10/bits/basic_string.h:48, from /usr/include/c++/10/string:55, from combo.h:3, from combo.cpp:1: /usr/include/c++/10/string_view:519:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator==(std::__type_identity_t<std::basic_string_view<_CharT, _Traits> >, std::basic_string_view<_CharT, _Traits>)' 519 | operator==(__type_identity_t<basic_string_view<_CharT, _Traits>> __x, | ^~~~~~~~ /usr/include/c++/10/string_view:519:5: note: template argument deduction/substitution failed: combo.cpp:13:32: note: 'std::__cxx11::basic_string<char>' is not derived from 'std::basic_string_view<_CharT, _Traits>' 13 | if (i && ANS[0] == j) | ^ In file included from /usr/include/c++/10/string:55, from combo.h:3, from combo.cpp:1: /usr/include/c++/10/bits/basic_string.h:6153:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator==(const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>&, const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>&)' 6153 | operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs, | ^~~~~~~~ /usr/include/c++/10/bits/basic_string.h:6153:5: note: template argument deduction/substitution failed: combo.cpp:13:32: note: mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} 13 | if (i && ANS[0] == j) | ^ In file included from /usr/include/c++/10/string:55, from combo.h:3, from combo.cpp:1: /usr/include/c++/10/bits/basic_string.h:6161:5: note: candidate: 'template<class _CharT> typename __gnu_cxx::__enable_if<std::__is_char<_Tp>::__value, bool>::__type std::operator==(const std::__cxx11::basic_string<_CharT>&, const std::__cxx11::basic_string<_CharT>&)' 6161 | operator==(const basic_string<_CharT>& __lhs, | ^~~~~~~~ /usr/include/c++/10/bits/basic_string.h:6161:5: note: template argument deduction/substitution failed: combo.cpp:13:32: note: mismatched types 'const std::__cxx11::basic_string<_CharT>' and '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} 13 | if (i && ANS[0] == j) | ^ In file included from /usr/include/c++/10/string:55, from combo.h:3, from combo.cpp:1: /usr/include/c++/10/bits/basic_string.h:6175:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator==(const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>&, const _CharT*)' 6175 | operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs, | ^~~~~~~~ /usr/include/c++/10/bits/basic_string.h:6175:5: note: template argument deduction/substitution failed: combo.cpp:13:32: note: mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} 13 | if (i && ANS[0] == j) | ^ In file included from /usr/include/c++/10/string:55, from combo.h:3, from combo.cpp:1: /usr/include/c++/10/bits/basic_string.h:6216:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator==(const _CharT*, const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>&)' 6216 | operator==(const _CharT* __lhs, | ^~~~~~~~ /usr/include/c++/10/bits/basic_string.h:6216:5: note: template argument deduction/substitution failed: combo.cpp:13:32: note: mismatched types 'const _CharT*' and 'char' 13 | if (i && ANS[0] == j) | ^ In file included from /usr/include/c++/10/string:41, from combo.h:3, from combo.cpp:1: /usr/include/c++/10/bits/allocator.h:192:7: note: candidate: 'bool std::operator==(const std::allocator<char>&, const std::allocator<char>&)' 192 | operator==(const allocator&, const allocator&) _GLIBCXX_NOTHROW | ^~~~~~~~ /usr/include/c++/10/bits/allocator.h:192:18: note: no known conversion for argument 1 from '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} to 'const std::allocator<char>&' 192 | operator==(const allocator&, const allocator&) _GLIBCXX_NOTHROW | ^~~~~~~~~~~~~~~~ In file included from /usr/include/c++/10/bits/stl_algobase.h:67, from /usr/include/c++/10/bits/char_traits.h:39, from /usr/include/c++/10/string:40, from combo.h:3, from combo.cpp:1: /usr/include/c++/10/bits/stl_iterator.h:1064:5: note: candidate: 'template<class _IteratorL, class _IteratorR, class _Container> bool __gnu_cxx::operator==(const __gnu_cxx::__normal_iterator<_IteratorL, _Container>&, const __gnu_cxx::__normal_iterator<_IteratorR, _Container>&)' 1064 | operator==(const __normal_iterator<_IteratorL, _Container>& __lhs, | ^~~~~~~~ /usr/include/c++/10/bits/stl_iterator.h:1064:5: note: template argument deduction/substitution failed: combo.cpp:13:32: note: mismatched types 'const __gnu_cxx::__normal_iterator<_IteratorL, _Container>' and '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} 13 | if (i && ANS[0] == j) | ^ In file included from /usr/include/c++/10/bits/stl_algobase.h:67, from /usr/include/c++/10/bits/char_traits.h:39, from /usr/include/c++/10/string:40, from combo.h:3, from combo.cpp:1: /usr/include/c++/10/bits/stl_iterator.h:1072:5: note: candidate: 'template<class _Iterator, class _Container> bool __gnu_cxx::operator==(const __gnu_cxx::__normal_iterator<_Iterator, _Container>&, const __gnu_cxx::__normal_iterator<_Iterator, _Container>&)' 1072 | operator==(const __normal_iterator<_Iterator, _Container>& __lhs, | ^~~~~~~~ /usr/include/c++/10/bits/stl_iterator.h:1072:5: note: template argument deduction/substitution failed: combo.cpp:13:32: note: mismatched types 'const __gnu_cxx::__normal_iterator<_Iterator, _Container>' and '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} 13 | if (i && ANS[0] == j) | ^ In file included from /usr/include/x86_64-linux-gnu/c++/10/bits/c++allocator.h:33, from /usr/include/c++/10/bits/allocator.h:46, from /usr/include/c++/10/string:41, from combo.h:3, from combo.cpp:1: /usr/include/c++/10/ext/new_allocator.h:171:2: note: candidate: 'template<class _Up> bool __gnu_cxx::operator==(const __gnu_cxx::new_allocator<char>&, const __gnu_cxx::new_allocator<_Tp>&)' 171 | operator==(const new_allocator&, const new_allocator<_Up>&) | ^~~~~~~~ /usr/include/c++/10/ext/new_allocator.h:171:2: note: template argument deduction/substitution failed: combo.cpp:13:32: note: 'std::string' {aka 'std::__cxx11::basic_string<char>'} is not derived from 'const __gnu_cxx::new_allocator<_Tp>' 13 | if (i && ANS[0] == j) | ^ combo.cpp:22:23: error: cannot convert 'std::string' {aka 'std::__cxx11::basic_string<char>'} to 'char' 22 | ANS.push_back(mxChar); | ^~~~~~ | | | std::string {aka std::__cxx11::basic_string<char>} In file included from /usr/include/c++/10/string:55, from combo.h:3, from combo.cpp:1: /usr/include/c++/10/bits/basic_string.h:1320:24: note: initializing argument 1 of 'void std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::push_back(_CharT) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]' 1320 | push_back(_CharT __c) | ~~~~~~~^~~ combo.cpp:7:9: warning: unused variable 'prev' [-Wunused-variable] 7 | int prev = 0; | ^~~~