- 大象喝水
-
240901gj花子轩 (EL230810) LV 8 @ 2024-10-28 13:07:38
#include <bits/stdc++.h>
using namespace std;
map<pair<char,char>,bool>m;
int main(){
int n;
cin>>n;
int sum=0;
while(n--){
string x;
cin>>x;
if(!m.count(make_pair<char,char>(x[0],x[1]))){
m[make_pair<char,char>(x[0],x[1])]=1;
sum++;
}
}
cout<<52-sum;
}
2 条评论
-
30201沈俊彦 (2212116沈俊彦) LV 10 @ 2024-11-03 14:18:06
我都看不懂你写的啥
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@ 2024-10-28 13:11:05
洛谷反馈
编译信息 编译失败 /tmp/compiler_a5coyl4x/src: 在函数‘int main()’中: /tmp/compiler_a5coyl4x/src:11:45: 错误：cannot bind rvalue reference of type ‘char&&’ to lvalue of type ‘__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type’ {aka ‘char’} 11 | if(!m.count(make_pair<char,char>(x[0],x[1]))){ | ^ In file included from /nix/store/bbmwawbq7wjb54fa35wr72alcm083d1f-luogu-gcc-9.3.0/include/c++/9.3.0/bits/stl_algobase.h:64, from /nix/store/bbmwawbq7wjb54fa35wr72alcm083d1f-luogu-gcc-9.3.0/include/c++/9.3.0/bits/char_traits.h:39, from /nix/store/bbmwawbq7wjb54fa35wr72alcm083d1f-luogu-gcc-9.3.0/include/c++/9.3.0/ios:40, from /nix/store/bbmwawbq7wjb54fa35wr72alcm083d1f-luogu-gcc-9.3.0/include/c++/9.3.0/istream:38, from /nix/store/bbmwawbq7wjb54fa35wr72alcm083d1f-luogu-gcc-9.3.0/include/c++/9.3.0/sstream:38, from /nix/store/bbmwawbq7wjb54fa35wr72alcm083d1f-luogu-gcc-9.3.0/include/c++/9.3.0/complex:45, from /nix/store/bbmwawbq7wjb54fa35wr72alcm083d1f-luogu-gcc-9.3.0/include/c++/9.3.0/ccomplex:39, from /nix/store/bbmwawbq7wjb54fa35wr72alcm083d1f-luogu-gcc-9.3.0/include/c++/9.3.0/x86_64-unknown-linux-gnu/bits/stdc++.h:54, from /tmp/compiler_a5coyl4x/src:1: /nix/store/bbmwawbq7wjb54fa35wr72alcm083d1f-luogu-gcc-9.3.0/include/c++/9.3.0/bits/stl_pair.h:524:21: 附注： 初始化‘constexpr std::pair<typename std::__decay_and_strip<_Tp>::__type, typename std::__decay_and_strip<_T2>::__type> std::make_pair(_T1&&, _T2&&) [with _T1 = char; _T2 = char; typename std::__decay_and_strip<_T2>::__type = char; typename std::__decay_and_strip<_Tp>::__type = char]’的实参 1 524 | make_pair(_T1&& __x, _T2&& __y) | ~~~~~~^~~ /tmp/compiler_a5coyl4x/src:12:36: 错误：cannot bind rvalue reference of type ‘char&&’ to lvalue of type ‘__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type’ {aka ‘char’} 12 | m[make_pair<char,char>(x[0],x[1])]=1; | ^ In file included from /nix/store/bbmwawbq7wjb54fa35wr72alcm083d1f-luogu-gcc-9.3.0/include/c++/9.3.0/bits/stl_algobase.h:64, from /nix/store/bbmwawbq7wjb54fa35wr72alcm083d1f-luogu-gcc-9.3.0/include/c++/9.3.0/bits/char_traits.h:39, from /nix/store/bbmwawbq7wjb54fa35wr72alcm083d1f-luogu-gcc-9.3.0/include/c++/9.3.0/ios:40, from /nix/store/bbmwawbq7wjb54fa35wr72alcm083d1f-luogu-gcc-9.3.0/include/c++/9.3.0/istream:38, from /nix/store/bbmwawbq7wjb54fa35wr72alcm083d1f-luogu-gcc-9.3.0/include/c++/9.3.0/sstream:38, from /nix/store/bbmwawbq7wjb54fa35wr72alcm083d1f-luogu-gcc-9.3.0/include/c++/9.3.0/complex:45, from /nix/store/bbmwawbq7wjb54fa35wr72alcm083d1f-luogu-gcc-9.3.0/include/c++/9.3.0/ccomplex:39, from /nix/store/bbmwawbq7wjb54fa35wr72alcm083d1f-luogu-gcc-9.3.0/include/c++/9.3.0/x86_64-unknown-linux-gnu/bits/stdc++.h:54, from /tmp/compiler_a5coyl4x/src:1: /nix/store/bbmwawbq7wjb54fa35wr72alcm083d1f-luogu-gcc-9.3.0/include/c++/9.3.0/bits/stl_pair.h:524:21: 附注： 初始化‘constexpr std::pair<typename std::__decay_and_strip<_Tp>::__type, typename std::__decay_and_strip<_T2>::__type> std::make_pair(_T1&&, _T2&&) [with _T1 = char; _T2 = char; typename std::__decay_and_strip<_T2>::__type = char; typename std::__decay_and_strip<_Tp>::__type = char]’的实参 1 524 | make_pair(_T1&& __x, _T2&& __y) | ~~~~~~^~~
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金老师 (zfkin)
