mousetrap.cpp: In function 'void read(ll&)':
mousetrap.cpp:22:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%lld",&x);
~~~~~^~~~~~~~~~~
mousetrap.cpp: In function 'void read(ll&, ll&)':
mousetrap.cpp:26:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%lld%lld",&x,&y);
~~~~~^~~~~~~~~~~~~~~~~~
mousetrap.cpp: In function 'void read(ll&, ll&, ll&)':
mousetrap.cpp:30:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%lld%lld%lld",&x,&y,&z);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~