Replace MinMax

#include <iostream>
using namespace std ;
typedef long long ll ;
int main() {
    ios::sync_with_stdio(false) ; cout.tie(NULL) ; cin.tie(NULL) ;
    int n ; cin >> n ;
    int minidx , maxidx ;
    int arr[n] ;
    for (int i = 0; i < n; i++) cin >> arr[i] ;
    int max = arr[0] ;
    int min = arr[0] ;
    for (int i = 0; i < n; i++) {
        if (arr[i] < min) {
            min = arr[i] , minidx = i ;
        }
        if (arr[i] > max) {
            max = arr[i] , maxidx = i ;
        }
    }
    swap(arr[minidx] , arr[maxidx]) ;
    for (int i = 0; i < n; i++) cout << arr[i] << " " ;

    return 0;
}