29 lines
611 B
C++
29 lines
611 B
C++
#include <bits/stdc++.h>
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using namespace std;
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//是不是质数
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bool IsPrime(int n) {
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for (int i = 2; i <= n / i; i++)
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if (n % i == 0)return false;
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return true;
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}
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//是不是回文数
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bool isHuiWen(int n) {
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int i = n;//n备份到了i,一会我们要操作i,i会变化，n操持不动
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int m = 0;//反向回文数结果
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while (i) {
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m = m * 10 + i % 10;
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i /= 10;
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}
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return m == n;
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}
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int main() {
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//1e8
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for (int i = 5; i <= 100000000; i++)
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if (IsPrime(i) && isHuiWen(i))
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cout << i << ",";
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return 0;
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} |