Compilare: main.cpp: In function 'bool verif(int)': main.cpp:54:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<cbc[x].size(); i++) ~^~~~~~~~~~~~~~ main.cpp:55:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=i+1; j<cbc[x].size(); j++) ~^~~~~~~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:142:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<ans.size(); i++) ~^~~~~~~~~~~ main.cpp: In function 'int cautare(int)': main.cpp:66:1: warning: control reaches end of non-void function [-Wreturn-type] } ^