#include #include using namespace std; template int solve(C beg,C end,int mask){ return beg+1>=end? !!((*beg-'0')&mask) :(solve(beg,beg+(end-beg)/2,mask)<<((end-beg+1)/2)) |(solve(beg+(end-beg)/2,end,mask)); } int main(){ string s; cin>>s; cout<