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题解：同向双指针

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class Solution {
public:/*** @param nums: an array of integers* @param s: An integer* @return: an integer representing the minimum size of subarray*/int minimumSize(vector<int> &nums, int s) {// write your code hereint j = 0;int sum = 0;int len = INT_MAX;for (int i = 0; i < nums.size(); ++i) {while (j < nums.size() && sum < s) {sum += nums[j];++j;}if (sum >= s) {len = min(len, j-i);}sum -= nums[i];}return len == INT_MAX ? -1 : len;}
};