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- #include <stdio.h>
- int main()
- {
- int N = 1000;
- int answer = 0;
- int sum_of_primes = 0;
- for (int i = 2; i < N; i++)
- {
- int is_prime = 1;
- for (int j = i - 1; j > 1; j--)
- {
- if (i % j == 0)
- {
- is_prime = 0;
- }
- }
- if (is_prime)
- {
- sum_of_primes += i;
- int sum_of_primes_is_prime = 1;
- for (int j = sum_of_primes - 1; j > 1; j--)
- {
- if (sum_of_primes % j == 0)
- {
- sum_of_primes_is_prime = 0;
- }
- }
- if (sum_of_primes_is_prime && sum_of_primes < N)
- {
- answer += 1;
- printf("%d\n", sum_of_primes);
- }
- }
- }
- printf("answer = %d\n", answer);
- return 0;
- }
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