标签：ati shuf sub fling likely class origin config equal
Shuffle a set of numbers without duplicates.
Example:
// Init an array with set 1, 2, and 3.
int[] nums = {1,2,3};
Solution solution = new Solution(nums);
// Shuffle the array [1,2,3] and return its result. Any permutation of [1,2,3] must equally likely to be returned.
solution.shuffle();
// Resets the array back to its original configuration [1,2,3].
solution.reset();
// Returns the random shuffling of array [1,2,3].
solution.shuffle();
Runtime: 244 ms, faster than 36.91% of C++ online submissions for Shuffle an Array.
class Solution {
private:
vector<int> Nums ;
public:
Solution(vector<int> nums) {
Nums = nums;
}
/** Resets the array to its original configuration and return it. */
vector<int> reset() {
return Nums;
}
/** Returns a random shuffling of the array. */
vector<int> shuffle() {
vector<int> tmpnums = Nums;
for(int i=0; i<Nums.size(); i++){
int newidx = i + rand()%(Nums.size() - i);
int tmp = tmpnums[i];
tmpnums[i] = tmpnums[newidx];
tmpnums[newidx] = tmp;
}
return tmpnums;
}
};
/**
* Your Solution object will be instantiated and called as such:
* Solution obj = new Solution(nums);
* vector<int> param_1 = obj.reset();
* vector<int> param_2 = obj.shuffle();
*/
标签：ati shuf sub fling likely class origin config equal
原文地址：https://www.cnblogs.com/ethanhong/p/10198310.html
