Wrong Answer
/in/foo.c: In function 'calculate':
/in/foo.c:9:6: warning: implicit declaration of function 'sqrt' [-Wimplicit-function-declaration]
y=sqrt(5*x+10);
^~~~
/in/foo.c:9:6: warning: incompatible implicit declaration of built-in function 'sqrt'
/in/foo.c:9:6: note: include '<math.h>' or provide a declaration of 'sqrt'
