powerrusse(n , p);

function y = powerrusse(n , p);


if p == 0
   y = 1;
elseif rem(p,2) == 1         % p est-il impair ?
   y  = n*powerrusse(n*n, floor(p/2));
else
   y  = powerrusse(n*n, floor(p/2));
end;