Compilare: main.cpp: In function 'void put(int)': main.cpp:14:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[p].size();i++){//verificam daca exista sau nu elementul in sir ~^~~~~~~~~~~~ main.cpp: In function 'void sterg(int)': main.cpp:26:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[p].size();i++){//cautam elementul ~^~~~~~~~~~~~ main.cpp: In function 'bool exist(int)': main.cpp:36:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[p].size();i++){//verificam daca exista ~^~~~~~~~~~~~