59 lines
938 B
C++
59 lines
938 B
C++
#include <stdio.h>
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#include <math.h>
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#include <string.h>
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int p[20000];
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bool sushu(int a)
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{
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int i;
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for(i=2;i<=sqrt((double)(a));i++)
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{
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if(a%i==0)
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return 0;
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}
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return 1;
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}
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bool huiwen(int a)
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{
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int b[44];
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int l=0,i;
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int c=a;
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while(a)
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{
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b[l++]=a%10;
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a/=10;
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}
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for(i=0;i<l/2;i++)
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{
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if(b[i]!=b[l-1-i])
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break;
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}
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if(i==l/2 &&sushu(c))
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return 1;
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else
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return 0;
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}
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int main()
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{
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int i;
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int a,b;
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memset(p,0,sizeof(p));
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int l=0;
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for(i=5;i<=9989900;i++)
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{
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if(huiwen(i))
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{
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p[l++]+=i;
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}
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}
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while(scanf("%d%d",&a,&b)!=EOF)
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{
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for(i=0;i<l;i++)
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{
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if(p[i] &&p[i]>=a &&p[i]<=b)
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printf("%d\n",p[i]);
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}
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printf("\n");
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}
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return 0;
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}
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