Compilare: user.cpp: In function ‘void rebuild(int, int)’: user.cpp:30:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(h[*it]>h[u]) ^ user.cpp: In function ‘void lanturi(int, int)’: user.cpp:53:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(!exist[*it] && h[*it]>h[u]) ^ user.cpp:48:23: warning: unused variable ‘o’ [-Wunused-variable] char cmax='a';int o=lant; ^ /tmp/ccEF405N.o: In function `main': user.cpp:(.text.startup+0x6b): warning: the `gets' function is dangerous and should not be used.