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  1. def len = 100
  2. boolean [] arr = new boolean[len]
  3. len.times{arr[it]=true;}
  4. arr[0] = false;//Fill 1, arr[1] =3
  5.  
  6. //arr.eachWithIndex{v,k ->println v; println k*2+1 }
  7.  
  8. def times = Math.sqrt(len) + 2 
  9. for(def i = 1; i < times; i++){
  10. def j = i;
  11. def dist = i+i+1;
  12. j += dist;
  13. for(; j < len; j=dist+j){
  14. arr[ j ] = false;
  15. }
  16. //arr.eachWithIndex{v,k ->println v; println k*2+1 }
  17. }
  18. arr.eachWithIndex{v,i->if(v){ println i*2+1 + ", "}  }
Success #stdin #stdout 1.46s 219072KB
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stdout 
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https://ideone.com/cKBOo
language:
Groovy (groovy 2.5.6)
created:
14 years ago
visibility:
public

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