func_code_string: #include <bits/stdc++.h>   using namespace std;   int sum[1000000 + 5];   int n, k, maxnum, minnum;   bool check(int p) {     for (int i = 0; i < maxnum; i += p) {       int l = i + k;       int r = min(maxnum, i + p - 1);       if (l < r && sum[r] - sum[l] > 0) return false;     }     return true;   }   int main() {     scanf( %d%d , &n, &k);     memset(sum, 0, sizeof(sum));     maxnum = 1;     minnum = 1000000;     for (int i = 1; i <= n; i++) {       int p;       scanf( %d , &p);       sum[p] = 1;       maxnum = max(maxnum, p);       minnum = min(minnum, p);     }     for (int i = 2; i <= maxnum; i++) sum[i] += sum[i - 1];     for (int i = minnum; i >= 1; i--)       if (check(i)) {         printf( %d n , i);         break;       }     return 0;   }   