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- #include <iostream>
- #include <cmath>
- using namespace std;
- int partition(int * a, int l, int r) {
- int v = a[(l + r) / 2];
- int i = l;
- int j = r;
- while (i <= j) {
- while (a[i] < v)
- i++;
- while (a[j] > v)
- j--;
- if (i >= j)
- break;
- swap(a[i++], a[j--]);
- }
- return j;
- }
- int findOrderStatistic(int* array, int k, int n) {
- int left = 0, right = n - 1;
- while (true) {
- int mid = partition(array, left, right);
- if (mid == k) {
- return array[mid];
- }
- else if (k < mid) {
- right = mid;
- }
- else {
- left = mid + 1;
- }
- }
- }
- int main() {
- int n, k;
- cin >> n;
- int* a = new int[n];
- for (int i = 0; i < n; ++i) {
- cin >> a[i];
- }
- for (int i = 0; i < n; ++i) {
- cout << a[i] << ' ';
- }
- cout << endl;
- for (int k = 0; k < 3; ++k) {
- int m;
- cin >> m;
- cout << findOrderStatistic(a, m, n);
- }
- return 0;
- }
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