Leetcode 974. Subarray Sums Divisible by K

阿新 • • 發佈：2019-03-16

for class prefix sdi pan array count val col

前綴和(prefix sum/cumulative sum)的應用

class Solution(object):
    def subarraysDivByK(self, A, K):
        P = [0]
        for x in A:
            P.append((P[-1] + x) % K)

        count = collections.Counter(P)
        return sum(v*(v-1)/2 for v in count.values())

for class prefix sdi pan array count val col 前綴和(prefix sum/cumulative sum)的應用 class Solution(object): def subarraysDivByK(self,

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