function val=adapt(pop,popsize,citysize,D)
val=zeros(1,popsize);
for i=1:popsize
    for j=1:citysize-1
        val(i)=val(i)+D(pop(i,j),pop(i,j+1));    %路徑權(quán)值相加
    end
    val(i)=val(i)+D(pop(i,citysize),pop(i,1));
end