Q = int(input())
for q in range(Q):
    L=list(input())
    for i in range(len(L)):
        L[i]=int(L[i])
    for i in range(len(L)-1):
        l=[]
        for j in range(1,len(L)):
            l.append((L[j]+L[j-1])%10+(L[j]+L[j-1])//10)
        L=l
    print(L[0])