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binarysearch.py
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binarysearch.py
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# search rotated array
def search(self, nums, target):
if not nums:
return -1
low, high = 0, len(nums) - 1
while low <= high:
mid = (low + high) / 2
if target == nums[mid]:
return mid
if nums[low] <= nums[mid]:
if nums[low] <= target <= nums[mid]:
high = mid - 1
else:
low = mid + 1
else:
if nums[mid] <= target <= nums[high]:
low = mid + 1
else:
high = mid - 1
return -1
# two sum sorted
# binary search
def twoSum(self, numbers, target):
for i in xrange(len(numbers)):
l, r = i+1, len(numbers)-1
tmp = target - numbers[i]
while l <= r:
mid = l + (r-l)//2
if numbers[mid] == tmp:
return [i+1, mid+1]
elif numbers[mid] < tmp:
l = mid+1
else:
r = mid-1
# Intersection of two sorted arrays
def interesectionArrays()