\begin{array}{c} \color{#db1616}{\texttt{#Khoadang09}} \end{array}

`@`$\texttt{C: }$

#include <stdio.h>
int main(){
    int n; scanf("%d",&n);
    int ar[n+1]; float sum = 0;
    for (int i=1;i<=n;i++){
        scanf("%d",&ar[i]);
        sum += ar[i];
    }
    printf("Sum: %.2f\n",(sum/n));
    printf("--Position and even value--\n");
    int count_even = 0, sum_even = 0;
    for (int i=1;i<=n;i++){
        if (ar[i]%2==0){
            count_even ++;
            sum_even += ar[i];
            printf("%d %d\n",i,ar[i]);
        }
    }
    printf("Sum even: %d, Average of even number: %.2f\n",sum_even,(sum_even/count_even)*1.0);
    for (int i=1;i<=n;i++){
        for (int j=i+1;j<=n;){
            if (ar[i]==ar[j]){
                for (int k=j;k<=n;k++) ar[k] = ar[k + 1];
                n--;
            } else j++;
        }
    }
    printf("After removing duplicate elements: ");
    for (int i = 1; i<=n; i++) printf("%d ",ar[i]);
    return 0;
}