#include <stdio.h> #include <math.h> #include <string.h> int main() { int i,j,k; int n,m; int sum; int count; int f=0; scanf("%d%d",&m,&n); for(i=m;i<=n;i++) { k=i; sum=0; for(;k>0;) { sum=sum*10; sum=sum+k%10; k=k/10; } if(sum==i) { count=0; for(j=2;j<sum;j++) { if(sum%j==0) { count++;break;} } if(count==0) { f++; printf("%6d",sum); if(f%5==0) printf("\n"); } } } return 0; } |
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