Compilare: user.cpp: In function ‘int main()’: user.cpp:22:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i <= N; ++i) ^ user.cpp:24:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 2; i <= N; ++i) ^ user.cpp:25:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 2*i; j <= N; j += i) ^ user.cpp:28:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=2;j<=N;j++) ^ user.cpp:31:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=2;i<=N-1;i++) ^ user.cpp:33:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=i+1;j<=N;j++) ^ user.cpp: In function ‘int divizor(long long unsigned int, long long unsigned int)’: user.cpp:17:1: warning: control reaches end of non-void function [-Wreturn-type] } ^