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  1. import sys
  2. a = int(sys.stdin.readline())
  3. b = int(sys.stdin.readline())
  4. d = 0
  5. for i in range(a):
  6. while (b != 0):
  7. c = b % 10
  8. d += int(c)
  9. round(b, 0)
  10. b /= 10
  11. print(d)
Success #stdin #stdout 0.03s 10156KB
stdin
20
11111111111111111111
stdout
27