Compilare: main.cpp: In function 'void refacere()': main.cpp:21:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < aux1.size(); ++i){ ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:54:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k == f.size() - 1){ ~~^~~~~~~~~~~~~~~