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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. #define fast_io ios::sync_with_stdio(0); cin.tie(0); cout.tie(0)
  5.  
  6. #define int long long
  7. #define pb push_back
  8. #define endl '\n'
  9.  
  10. const int INF = 1e18;
  11.  
  12. int ans;
  13.  
  14. void generate(string cur, int len, vector<int>& d, int target) {
  15.     if ((int)cur.size() == len) {
  16.         if (cur[0] == '0') return;
  17.  
  18.         int num = stoll(cur);
  19.         ans = min(ans, abs(target - num));
  20.         return;
  21.     }
  22.  
  23.     for (int x : d) {
  24.         generate(cur + char(x + '0'), len, d, target);
  25.     }
  26. }
  27.  
  28. void solve() {
  29.  
  30.     int a, n;
  31.     cin >> a >> n;
  32.  
  33.     vector<int> b(n);
  34.  
  35.     for (int i = 0; i < n; i++) cin >> b[i];
  36.  
  37.     int digits = to_string(a).size();
  38.  
  39.     ans = INF;
  40.  
  41.     generate("", digits, b, a);
  42.  
  43.     if (digits > 1)
  44.         generate("", digits - 1, b, a);
  45.  
  46.     generate("", digits + 1, b, a);
  47.  
  48.     cout << ans << endl;
  49. }
  50.  
  51. int32_t main() {
  52.  
  53.     fast_io;
  54.  
  55.     int t;
  56.     cin >> t;
  57.  
  58.     while (t--) solve();
  59.  
  60.     return 0;
  61. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
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4
0 2
0 1
11 2
1 2
222 2
3 4
3333 2
6 7
stdout
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1
0
111
2556
https://ideone.com/6uSbev
language:
C++ (gcc 8.3)
created:
9 hours ago
visibility:
public

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