#include <stdio.h>
#include <stdlib.h>
#include <time.h>
int main()
{
    const n = 30;
    int a[n], i, sred = 0, usp = 0;
    srand(time(NULL));
    for (i=0; i<n; i++)
    {
        a[i] = rand() % 4 + 2; /*Esli nuzhen vvod v ruchnuyu, to zamenit' etu strochku na ' scanf("%d", &a[i]); '*/
    }
    printf("Ishodniye ocenki: \n");
    for (i=0; i<n; i++)
    {
        printf("%d ", a[i]);
    }

    for (i=0; i<n; i++)
    {
        sred += a[i];
    }
    printf("\nSrednii ball: %d.\n", sred/n);

    for(i=0; i<n; i++)
    {
        if(a[i] > 2)
        {
            usp += 1;
        }
    }
    printf("Uspevaemost': %d%%.", usp*100/n);
    printf("");

    return 0;
}