笔试-百度-180914

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小牛编辑
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2023-12-01
  • 选择 30,简答 2,编程 2

字符串计数

暴力 1(9%,MLE)

s = input()

tmp = set()
for i in range(len(s)):
    tmp.add(s)
    s = s[1:] + s[0]

print(len(tmp))

暴力 2(AC)

s = input()

def foo(s):
    for i in range(1, len(s) + 1):
        if len(s) % i == 0:
            if s[:i] * (len(s) // i) == s:
                return i

print(foo(s))

寻寻觅觅

暴力(73%,TLE)

A = input()
B = input()
Q = int(input())

for _ in range(Q):
    l, r = list(map(int, input().split()))
    print(A[l-1: r].count(B))

前缀数组(36%,TLE)

A = input()
B = input()
Q = int(input())

ret = [0] * len(A)
for i in range(len(A)):
    ret[i] = A[:i].count(B)

ret += [ret[-1]]

for _ in range(Q):
    l, r = list(map(int, input().split()))
    print(ret[r] - ret[l])