Compilare: main.cpp: In function 'void add(int)': main.cpp:8:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[x%ma].size();i++) ~^~~~~~~~~~~~~~~ main.cpp: In function 'int find(int)': main.cpp:18:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[x%ma].size();i++) ~^~~~~~~~~~~~~~~