Compilare: main.cpp: In function 'int main()': main.cpp:128:17: warning: unused variable 'a' [-Wunused-variable] 128 | int a,b,dif=nivel[y]-nivel[x]; | ^ main.cpp:128:19: warning: unused variable 'b' [-Wunused-variable] 128 | int a,b,dif=nivel[y]-nivel[x]; | ^ main.cpp:58:9: warning: unused variable 'put' [-Wunused-variable] 58 | int put=1; | ^~~ main.cpp:59:9: warning: unused variable 'cnt' [-Wunused-variable] 59 | int cnt=0; | ^~~