시간 제한메모리 제한제출정답맞힌 사람정답 비율
1 초 256 MB2244114981452.516%

문제

양의 정수 n의 각 자리수의 제곱의 합을 계산한다. 그렇게 해서 나온 합도 각 자리수의 제곱의 합을 계산한다. 이렇게 반복해서 1이 나온다면, n을 상근수라고 한다.

700은 상근수이다.

  • 72 + 02 + 02 = 49
  • 42 + 92 = 97
  • 92 + 72 = 130
  • 12 + 32 + 02 = 10
  • 12 + 02 = 1

2는 상근수가 아니다.

  • 22 = 4
  • 42 = 16
  • 12 + 62 = 37
  • 32 + 72 = 58
  • 52 + 82 = 89
  • 82 + 92 = 145
  • 12 + 42 + 52 = 42
  • 42 + 22 = 20
  • 22 + 02 = 4
  • 42 = 16
  • ... 끝나지 않는다

소수는 1과 자기자신을 제외하고 약수가 없는 수이다. 2, 3, 5, 7, 11, 13, 17, 19, ... 는 소수이다.

소수상근수는 소수이면서 상근수인 숫자이다. 7, 13, 19, ... 는 소수 상근수이다.

n이 주어졌을 때, n보다 작거나 같은 모든 소수상근수를 구하는 프로그램을 작성하시오.

입력

첫째 줄에 n (10 ≤ n ≤ 1000000)이 주어진다.

출력

n보다 작거나 같은 소수상근수를 한 줄에 하나씩 오름차순으로 출력한다.

예제 입력 1

20

예제 출력 1

7
13
19
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

출처

ICPC > Regionals > Asia Pacific > Thailand > Asia Thailand National Programming Contest > 2009 ACM-ICPC Thailand National Programming Contest D번

  • 문제를 번역한 사람: baekjoon
  • 문제의 오타를 찾은 사람: luke0201