MaxScore←{

     MS←{
         pvec←{1,(⍵/0),1}⍤0⊢¯1+⍳¯1+≢⍵
         parts←pvec(⊂⍤1)⍵
         ⌈/+/+/¨'01'(=⍤1)parts
     }

⍝ Tests
     4≢MS'0011':∘∘∘
     3≢MS'0000':∘∘∘
     3≢MS'1111':∘∘∘
     3≢MS'0101':∘∘∘
     5≢MS'011101':∘∘∘

     'All tests passed.'
 }