Compilare: main.cpp: In function 'void init()': main.cpp:21:11: warning: unused variable 'j' [-Wunused-variable] int i,j; ^ main.cpp: In function 'bool BFS()': main.cpp:28:9: warning: unused variable 'i' [-Wunused-variable] int i; ^ main.cpp:48:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:53:11: warning: unused variable 'j' [-Wunused-variable] int i,j,t,x,y,c; ^ main.cpp:53:13: warning: unused variable 't' [-Wunused-variable] int i,j,t,x,y,c; ^