An ant is on a boundary. It sometimes goes left and sometimes right.
\n\nYou are given an array of non-zero integers nums. The ant starts reading nums from the first element of it to its end. At each step, it moves according to the value of the current element:
nums[i] < 0, it moves left by -nums[i] units.nums[i] > 0, it moves right by nums[i] units.Return the number of times the ant returns to the boundary.
\n\nNotes:
\n\n|nums[i]| units. In other words, if the ant crosses the boundary during its movement, it does not count.\n
Example 1:
\n\n\nInput: nums = [2,3,-5]\nOutput: 1\nExplanation: After the first step, the ant is 2 steps to the right of the boundary.\nAfter the second step, the ant is 5 steps to the right of the boundary.\nAfter the third step, the ant is on the boundary.\nSo the answer is 1.\n\n\n
Example 2:
\n\n\nInput: nums = [3,2,-3,-4]\nOutput: 0\nExplanation: After the first step, the ant is 3 steps to the right of the boundary.\nAfter the second step, the ant is 5 steps to the right of the boundary.\nAfter the third step, the ant is 2 steps to the right of the boundary.\nAfter the fourth step, the ant is 2 steps to the left of the boundary.\nThe ant never returned to the boundary, so the answer is 0.\n\n\n
\n
Constraints:
\n\n1 <= nums.length <= 100-10 <= nums[i] <= 10nums[i] != 0nums[i] to it in each step."
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