Compilare: main.cpp: In function 'int dfs(int)': main.cpp:46:10: warning: unused variable 'x' [-Wunused-variable] ll x, y; ^ main.cpp:46:13: warning: unused variable 'y' [-Wunused-variable] ll x, y; ^ main.cpp: In function 'int main()': main.cpp:83:12: warning: unused variable 'x' [-Wunused-variable] ll x, y; ^ main.cpp:83:15: warning: unused variable 'y' [-Wunused-variable] ll x, y; ^ main.cpp: In function 'bool ok(int, int)': main.cpp:39:1: warning: control reaches end of non-void function [-Wreturn-type] } ^