Compilare: main.cpp: In function 'int main()': main.cpp:53:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[x].size();i++) ~^~~~~~~~~~~~ main.cpp:64:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[x].size();i++) ~^~~~~~~~~~~~ main.cpp: In function 'int reprezentant(int)': main.cpp:16:1: warning: control reaches end of non-void function [-Wreturn-type] } ^