#include<stdio.h>

int even(int i){
    if (i%2==0){
        return 1;
    }
    return 0;
}

int SNT(int a){
    int i;
    if (a<=1){
        return 0;
    }
    else{
        for (i=2;i<=a-1;i++){
            if (a%i==0){
                return 0;
            }
        return 1;
        }
    }
}



int main() {


    int i,n,m,max,j;
    int a[1000];
    int sum=0,count=0,k=0;

    printf("Nhap so hang tu: ");scanf("%d",&n);

    for(i=0;i<n;i++){
        printf("Nhap gia tri cho a[%d]: ",i);scanf("%d",&a[i]);
    }

/*Tim Max*/
    max = a[0];
    for(i=0;i<n;i++){
        if(a[i]>max){
            max = a[i];
        }
    }

    printf("\nVi tri gia tri lon nhat: ");
    for(i=0;i<n;i++){
        if (a[i]==max){
            printf("a[%d]  ",i);
            k+=1;
        }
    }

/*Gia tri trung binh cac so chan*/
    /*Tong cac so chan*/
    for(i=0;i<n;i++){
        if (even(a[i])==1){
            count+=1;
            sum+=a[i];
        }
    }
    /*Gia tri trung binh*/
    printf("\nGia tri trung binh cac so chan:%d /%d = %f",sum,count,(double)sum/count);
    printf("\n");
/*Boi cua 3 va 5*/
    printf("Boi cua 3 va 5 : ");
    for(i=0;i<n;i++){
        if (a[i] %3 == 0 && a[i] %5 ==0){
            printf("%3d",a[i]);
            }
    }

    printf("\n");
/*Tim so nguyen to*/
    printf("So nguyen to trong mang: ");
    for(i=0;i<n;i++){
        if(SNT(a[i]) == 1){
            printf("%3d",a[i]);
        }
    }
printf("\n");
/*Xoa phan tu co gi tri lon nhat trong mang*/

        for (m=0;m<k;m++){
            for(i=0;i<n;i++){
                if(a[i]==max){
                    for(j=i;j<n-1;j++){
                        a[j]=a[j+1];
                    }
                }
            }
    }
    if(a[0]!=max){
        printf("Mang sau khi xoa: ");
        for(i=0;i<n-k;i++){
            printf("%3d",a[i]);
        }
    }
    else{
        printf("Ahihi tinh lam gi =)))");
    }
    printf("\n");
    return 0;
}