Compilare: user.cpp: In function ‘int main()’: user.cpp:39:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int nod = 0; nod < v.size(); ++nod){ ^ user.cpp:40:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int de_la = 0; de_la < v.size(); ++de_la){ ^ user.cpp:46:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int delta = 2; delta <= v.size(); ++delta){ ^ user.cpp:47:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int st = 0, fin = st+delta-1; fin < v.size(); ++st, ++fin){ ^ user.cpp:72:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int de_la = fin+1; de_la < v.size(); ++de_la){ ^ user.cpp:76:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v.size(); ++i){ ^