Compilare: user.cpp: In function ‘void citire()’: user.cpp:20:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<strlen(s); i++) ~^~~~~~~~~~ user.cpp: In function ‘int cuplaj(int)’: user.cpp:38:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<v[nod].size(); j++) ~^~~~~~~~~~~~~~ user.cpp:49:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<v[nod].size(); j++) ~^~~~~~~~~~~~~~