Triangles with pranksters

Instructions:

Insert numbers into empty fields in triangle (grape). The sum of two neighbouring numbers in one row must be equal to number below those fields. You may use only "pranskters" - numbers, which are known and located below triangle (grape).

Example

17
3
71
0
  
3
  
15
  
18
  
21
  
32
  
50
  

Solution

17
15
3
0
32
18
3
50
21
71
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Triangles with pranksters
Triangles with pranksters

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