#include <iostream>
using namespace std;

int main() {
int arr[] = {1, 2, 3, 4, 5};
int left = 0, right = 4;
while (left < right) {
while (arr[left] % 2 == 1 && left < right) left++;
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if (left < right) {
swap(arr[left], arr[right]);
}
}
for (int i = 0; i < 5; i++) {
cout << arr[i] << " ";
}
return 0;
}