magictree.cpp: In function 'int main()':
magictree.cpp:11:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d%d", &n, &m, &k);
~~~~~^~~~~~~~~~~~~~~~~~~~~~
magictree.cpp:15:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &p);
~~~~~^~~~~~~~~~
magictree.cpp:24:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d%d", &x, &y, &z);
~~~~~^~~~~~~~~~~~~~~~~~~~~~