42. Adding Reversed Numbers

code:

tc = int(input()) 

while tc: 
    tc -= 1 
    s, t = [str(x) for x in raw_input().split()] 

    p = [int(x) for x in s] 
    q = [int(x) for x in t] 

    lp = len(p) 
    lq = len(q) 

    if lp > lq: 
        q[lq : lp] = [0] * (lp - lq) 
    elif lq > lp: 
        p[lp : lq] = [0] * (lq - lp) 

    result = [] 
    carry = 0 
    while p and q: 
        s = p.pop(0) + q.pop(0) + carry 
        carry = s / 10 
        s = s % 10 
        result.append(s) 
    if carry: 
        result.append(carry) 

    while result: 
        temp = result.pop(0) 
        if temp != 0: 
            result.insert(0, temp) 
            break 

    output = [str(x) for x in result] 
    print ''.join(output) 

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