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r;fb;f(a,lint*a)int*a;{forb=(r=0;l--;b=*a++)r+=*a%2*~?b%2*~-*a++;l=r;b+f(a):0;}
Input as an0-terminated array a and its length l.
a
l
Try it online! Recursive function.
-10 bytes thanks to Arnauld!
Try it online!
r;f(a,l)int*a;{for(r=0;l--;)r+=*a%2*~-*a++;l=r;}
Input as an array a and its length l.
b;f(int*a){b=(b=*a++)?b%2*~-b+f(a):0;}
Input as 0-terminated array a.
Recursive function.
