[codility]PassingCars

Python代码如下：

def solution(A):
    # write your code in Python 2.6
    curZeroCnt = 0
    totalPairs = 0
    for value in A:
        if value == 0:
            curZeroCnt += 1
        else:
            totalPairs += curZeroCnt
    
    if totalPairs > 1000000000:
        return -1
    else:
        return totalPairs
    pass