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- List<Integer> list = new ArrayList<>();
- for (int i = 1; i<1001; i++){
- int sum = 0;
- for(int a=i; a>0; a/=10){
- sum += (a%10)*(a%10);
- }
- if (sum%2==0) list.add(i);
- }
- int sum = IntStream.range(1, 1000)
- .filter(number -> Math.sqrt(number) % 1 == 0)
- .sum();
- System.out.println(sum);
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