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TwoPointerSort.cpp

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void swap(vector<int>&r, int start, int end){

int temp = r[start];

r[start] = r[end];

r[end] = temp;

}

vector<int> move(vector<int>&nums){

int pt1 = 0;

int pt2 = nums.size() - 1;

while (pt1 < pt2){

swap(nums,pt1,pt2);

pt1++;

pt2++;

}

return nums;

}