Compilare: user.cpp: In function ‘void citire()’: user.cpp:39:16: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (p==3) ^ user.cpp: In function ‘void df(int)’: user.cpp:50:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[k].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:102:9: warning: unused variable ‘i’ [-Wunused-variable] int i,j; ^ user.cpp:102:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^