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#include<stdio.h>
int main()
{
    int array[7], count = 0, sum = 0;
    float avg;
    for (int i = 0; i < 7;i++)
    {
        scanf("%d", &array[i]);
        sum += array[i];
        if(array[i]>30)
        {
            count++;
        }
    }
    avg = sum / 7.0;
    printf("%.1f %d\n", avg, count);
    for (int i = 0;i<7;i++)
    {
        if(array[i]>30)
        {
            printf("%d ", i + 1);
        }
    }
    printf("\n");
    return 0;
}