Compilare: main.cpp: In function 'int sdo(std::vector<int>, int)': main.cpp:23:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(L.size() == k + 1) return v[k]; ~~~~~~~~~^~~~~~~~ main.cpp:24:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k < L.size() - 1) return sdo(L, k); ~~^~~~~~~~~~~~~~ main.cpp:27:1: warning: control reaches end of non-void function [-Wreturn-type] } ^