Compilare: user.cpp: In function ‘int cealalta()’: user.cpp:24:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<rez.size(); i++) ^ user.cpp: In function ‘void topSort(int)’: user.cpp:47:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[x].size(); ++i) ^ user.cpp: In function ‘int main()’: user.cpp:59:12: warning: unused variable ‘a’ [-Wunused-variable] int i, a, b, c; ^