Python

Решение 1

from random import randint

arr = [randint(-15, 15) for i in range(10)]

print(sum([i for i in arr if i > 0]))

Решение 2

from random import randint

arr = [randint(-15, 15) for i in range(10)]

summ = 0

for i in arr:

   if i > 0:

       summ += i

print(summ)