Compilare: main.cpp: In function 'int main()': main.cpp:18:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<n; i++) ~^~ main.cpp:23:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int limit=margin%step; limit<=margin; limit+=step) { ~~~~~^~~~~~~~ main.cpp:24:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(v[len].dist<=limit) ~~~~~~~~~~~^~~~~~~