import java.util.*; public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); while(in.hasNext()){ int a = in.nextInt(), b =in.nextInt() ;int sum=0; for (int k = a+1; k < b; k++) { int d = 1; for (int i = 2; i <= k/2; i++) { if (k % i == 0) d = 0; } if (d == 1) sum+=k; } System.out.println(sum); } } } |
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