Compilare: user.cpp: In function ‘void insertValue(int)’: user.cpp:21:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[L].size();i++) ^ user.cpp: In function ‘int findValue(int)’: user.cpp:35:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[L].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:62:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] m[s[i++]]+=sign*coef; ^