Compilare: main.cpp: In function 'int main()': main.cpp:20:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1; i<=k; ++i) ~^~~ main.cpp:19:9: warning: unused variable 'dim' [-Wunused-variable] int dim=1; ^~~ main.cpp:25:14: warning: unused variable 'i' [-Wunused-variable] int dr=1,i=k-1; ^