O(n^2)
#include <iostream>
#include <vector>
using namespace std;
void selection_sort(vector<int> &nums) {
int min_index, temp;
for (int i = 0; i < nums.size(); i++){
min_index = i;
for(int j = i+1; j < nums.size(); j++) {
if (nums[j] < nums[min_index]) {
min_index = j;
}
}
temp = nums[min_index];
nums[min_index] = nums[i];
nums[i] = temp;
}
}
int main() {
vector<int> nums = {5,4,3,2,1};
selection_sort(nums);
for (int i = 0; i < nums.size(); i++) {
cout << nums[i] << " ";
}
}