1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76
|
#include <cstdio> #include <cstring> #include <algorithm> #include <cstdlib> #include <string> #include <vector> using namespace std;
typedef long long LL; const int maxn = 10010; const int tmp[] = {1, 3, 7, 9}; int p[1250], pnum; bool np[maxn]; vector<int> bit[10];
void Euler_Prime() { np[1] = true; for (int i = 2; i < maxn; ++i) { if (!np[i]) { p[pnum++] = i; } for (int j = 0; j < pnum; ++j) { if (i * p[j] >= maxn) { break; } np[i * p[j]] = true; if (i % p[j] == 0) { break; } } } }
bool isprime(int n) { if (n < maxn) { return !np[n]; } for (int i = 0; i < pnum; ++i) { if (n % p[i] == 0) { return false; } } return true; }
int main() { freopen("sprime.in", "r", stdin); freopen("sprime.out", "w", stdout); Euler_Prime(); bit[1].push_back(2); bit[1].push_back(3); bit[1].push_back(5); bit[1].push_back(7); int n; scanf("%d", &n); for (int i = 2; i <= n; ++i) { for (int j = 0; j < bit[i - 1].size(); ++j) { int x = bit[i - 1][j] * 10; for (int k = 0; k < 4; ++k) { if (isprime(x + tmp[k])) { bit[i].push_back(x + tmp[k]); } } } } sort(bit[n].begin(), bit[n].end()); for (int i = 0; i < bit[n].size(); ++i) { printf("%d\n", bit[n][i]); } return 0; }
|