Compilare: main.cpp: In function 'int main()': main.cpp:27:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t i = 0; i < k; i++) ~~^~~ main.cpp:31:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t i = 1; i < n; i++) ~~^~~