Compilare: main.cpp: In function 'void solve1()': main.cpp:36:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(aux.count() == k){ ~~~~~~~~~~~~^~~~ main.cpp:42:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(aux.count() == k) ~~~~~~~~~~~~^~~~ main.cpp: In function 'void solve2()': main.cpp:81:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < poz.size(); ++i){ ~~^~~~~~~~~~~~ main.cpp:94:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i < poz.size() - 1) ~~^~~~~~~~~~~~~~~~