Compilare: main.cpp: In function 'void bkt(int, int)': main.cpp:14:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v.size() == k) ~~~~~~~~~^~~~ main.cpp:16:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); i++) ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:38:12: warning: unused variable 'k' [-Wunused-variable] int n, k; ^