strange_device.cpp: In function 'void solve_1()':
strange_device.cpp:12:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%lld %lld", &l, &r);
~~~~~^~~~~~~~~~~~~~~~~~~~~
strange_device.cpp: In function 'int main()':
strange_device.cpp:27:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %lld %lld", &n, &A, &B);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
strange_device.cpp:39:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%lld %lld", &l, &r);
~~~~~^~~~~~~~~~~~~~~~~~~~~