Compilare: user.cpp: In function ‘int main()’: user.cpp:13:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++) ^ user.cpp:20:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++) ^ user.cpp:33:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=2;i<=n;i++) ^ user.cpp:48:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=q;i<=n;i++) ^ user.cpp:57:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++) ^