54 lines
1.4 KiB
C++
54 lines
1.4 KiB
C++
#include <array>
|
|
#include <iomanip>
|
|
#include <iostream>
|
|
|
|
const int MC = 103 * 1000 * 10000 + 11 * 9 + 1;
|
|
std::array<bool, MC + 1> SV;
|
|
|
|
void sieve() {
|
|
std::array<int, 10000> dS;
|
|
for (int a = 9, i = 9999; a >= 0; a--) {
|
|
for (int b = 9; b >= 0; b--) {
|
|
for (int c = 9, s = a + b; c >= 0; c--) {
|
|
for (int d = 9, t = s + c; d >= 0; d--) {
|
|
dS[i--] = t + d;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
for (int a = 0, n = 0; a < 103; a++) {
|
|
for (int b = 0, d = dS[a]; b < 1000; b++, n += 10000) {
|
|
for (int c = 0, s = d + dS[b] + n; c < 10000; c++) {
|
|
SV[dS[c] + s++] = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
int main() {
|
|
sieve();
|
|
|
|
std::cout << "The first 50 self numbers are:\n";
|
|
for (int i = 0, count = 0; count <= 50; i++) {
|
|
if (!SV[i]) {
|
|
count++;
|
|
if (count <= 50) {
|
|
std::cout << i << ' ';
|
|
} else {
|
|
std::cout << "\n\n Index Self number\n";
|
|
}
|
|
}
|
|
}
|
|
for (int i = 0, limit = 1, count = 0; i < MC; i++) {
|
|
if (!SV[i]) {
|
|
if (++count == limit) {
|
|
//System.out.printf("%,12d %,13d%n", count, i);
|
|
std::cout << std::setw(12) << count << " " << std::setw(13) << i << '\n';
|
|
limit *= 10;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|