Eroare de compilare: user.cpp:12:25: error: ‘int y1’ redeclared as different kind of symbol int n,m,i,j,k,p,u,x1,x2,y1,y2,pas,sol; ^ In file included from /usr/include/features.h:357:0, from /usr/include/i386-linux-gnu/c++/4.8/bits/os_defines.h:39, from /usr/include/i386-linux-gnu/c++/4.8/bits/c++config.h:420, from /usr/include/c++/4.8/iosfwd:38, from /usr/include/c++/4.8/ios:38, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: /usr/include/i386-linux-gnu/bits/mathcalls.h:243:1: error: previous declaration of ‘double y1(double)’ __MATHCALL (y1,, (_Mdouble_)); ^ user.cpp: In function ‘void build(int, int, int)’: user.cpp:23:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<a[2*nod].size()&&j<=a[2*nod+1].size()) ^ user.cpp:23:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<a[2*nod].size()&&j<=a[2*nod+1].size()) ^ user.cpp:32:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;i<a[2*nod].size();i++) ^ user.cpp:34:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;j<a[2*nod+1].size();j++) ^ user.cpp: In function ‘void query(int, int, int, int, int)’: user.cpp:41:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(pas=1;2*pas<=a[nod].size();pas*=2); ^ user.cpp:43:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j+pas<a[nod].size()) ^ user.cpp:44:36: error: ISO C++ forbids comparison between pointer and integer [-fpermissive] if(a[nod][j+pas].s<y1) ^ user.cpp:47:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(pas=1;2*pas<=a[nod].size();pas*=2); ^ user.cpp:49:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j+pas<a[nod].size()) ^ user.cpp: In function ‘int main()’: user.cpp:71:12: error: cannot bind ‘std::basic_istream<char>::__istream_type {aka std::basic_istream<char>}’ lvalue to ‘std::basic_istream<char>&&’ fin>>x1>>y1>>x2>>y2; ^ In file included from /usr/include/c++/4.8/fstream:38:0, from user.cpp:1: /usr/include/c++/4.8/istream:872:5: error: initializing argument 1 of ‘std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&&, _Tp&) [with _CharT = char; _Traits = std::char_traits<char>; _Tp = double(double)throw ()]’