Compilare: user.cpp: In function ‘bool gut()’: user.cpp:21:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Pattern.size();++i) ^ user.cpp:28:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=-1;j+i+Bad<Trial.size();++j) ^ user.cpp:29:62: warning: narrowing conversion of ‘((Pattern.std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size<char, std::char_traits<char>, std::allocator<char> >() + ((std::__cxx11::basic_string<char>::size_type)j)) - ((std::__cxx11::basic_string<char>::size_type)Bad))’ from ‘std::__cxx11::basic_string<char>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] v.push_back({i+j-Bad,Bad,Pattern.size()+j-Bad}); ^ user.cpp:49:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(a==Trial.size() && i+(1-b)<Pattern.size()) ^ user.cpp:49:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(a==Trial.size() && i+(1-b)<Pattern.size()) ^ user.cpp:64:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v.size();++j) ^ user.cpp:72:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i+1==Pattern.size() && v.size()) ^ user.cpp:74:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v.back().first==Trial.size()) ^ user.cpp:93:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v.size();++j) ^ user.cpp:94:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[j].third==Trial.size()) ^ user.cpp: In function ‘int main()’: user.cpp:102:23: warning: NULL used in arithmetic [-Wpointer-arith] for(int i=0;c[i]!=NULL;++i) ^