Compilare: user.cpp: In function ‘int main()’: user.cpp:27:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=2;i<=N;i++) ^ user.cpp:36:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=N;i++) ^ user.cpp:45:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=N;i++) ^ user.cpp:52:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=N;i+=10) ^ user.cpp:22:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,k; ^ user.cpp:22:13: warning: unused variable ‘k’ [-Wunused-variable] int i,j,k; ^ user.cpp:26:18: warning: unused variable ‘bestN’ [-Wunused-variable] unsigned int bestN = v[1]; ^