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- #include<stdio.h>
- int prime_check(int a)
- {
- int i;
- for(i=2;i*i<=a;i++)
- {
- if(a%i==0)
- return 1;
- }
- if(i*i>a)
- return 0;
- }
- int main()
- {
- int i,j,n;
- while(scanf("%d", &n)==1 && n!=0)
- {
- for(j=2;j<=n;j++)
- {
- for(i=2;i*i<=j;i++)
- {
- if(j%i==0)
- break;
- }
- if(i*i>j)
- {
- if(prime_check(n-j)== 0)
- {
- printf("%d = %d + %d\n",n,j,n-j);
- break;
- }
- }
- }
- }
- return 0;
- }
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