Compilare: user.cpp: In function ‘int Solve(int, int)’: user.cpp:45:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] val[car]=1-val[car]; ^ user.cpp:45:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] val[car]=1-val[car]; ^ user.cpp:55:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v.size();i++) ^ user.cpp:45:31: warning: ‘car’ may be used uninitialized in this function [-Wmaybe-uninitialized] val[car]=1-val[car]; ^ user.cpp:45:31: warning: ‘car’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:45:31: warning: ‘car’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:45:31: warning: ‘car’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp: In function ‘int main()’: user.cpp:45:31: warning: ‘car’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:17:10: note: ‘car’ was declared here char car; ^