poj 1316 Self Numbers

#include <iostream>#include <cstdlib>#include <cstdio>#include <cstring>using namespace std;#define maxn 10001bool is_self[maxn];int generate(int a){    int ret = a;    while (a)    {        ret += a % 10;        a /= 10;    }    return ret;}int main(){    for (int i = 1; i < maxn; i++)        is_self[i] = true;    for (int i = 1; i < maxn; i++)    {        if (is_self[i]) printf("%dn", i);        int temp = generate(i);        if (temp < maxn) is_self[temp] = false;    }    return 0;}