Compilare: main.cpp: In function 'int parantezari_corecte(int&)': main.cpp:31:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(cursor<to_solve.length() && to_solve[cursor]!=')') ~~~~~~^~~~~~~~~~~~~~~~~~ main.cpp:66:1: warning: control reaches end of non-void function [-Wreturn-type] } ^