Compilare: user.cpp: In function ‘bool Check2(int, int)’: user.cpp:23:14: warning: unused variable ‘sol’ [-Wunused-variable] int k=0, sol; ^ user.cpp: In function ‘void Read()’: user.cpp:47:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j < strlen(s)){ ^ user.cpp:67:27: warning: ‘delta’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(delta >= 0 and Check1(sol)) ^