31 lines
461 B
C
31 lines
461 B
C
#include <stdio.h>
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int k;
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int l[15];
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int isPirme(int a) {
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for (int i = 2; i * i <= a; i++) {
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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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int isSuper(int a) {
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while (a) {
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if (isPirme(a) == 0)
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return 0;
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a /= 10;
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}
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return 1;
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}
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int main() {
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for (int i = 3000; i <= 6000; i++) {
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if (isSuper(i))
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l[k++] = i;
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}
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printf("%d", l[2]);
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return 0;
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}
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// 答案为 3733
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