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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define int long long
  4. using i128 = __int128_t;
  5.  
  6. i128 make_num(int digit, int len) {
  7.     i128 num = 0;
  8.     for(int i = 0; i < len; i++)
  9.         num = num * 10 + digit;
  10.     return num;
  11. }
  12.  
  13. i128 abs128(i128 x){
  14.     return x < 0 ? -x : x;
  15. }
  16.  
  17. signed main() {
  18.     ios::sync_with_stdio(false);
  19.     cin.tie(nullptr);
  20.     int h;
  21.     cin>>h;
  22.     while(h--){
  23.     int f, t;
  24.     cin >> f >> t;
  25.  
  26.     vector<int> v(2);
  27.     cin >> v[0] >> v[1];
  28.  
  29.     int a = v[0];
  30.     int b = v[1];
  31.     int n;
  32.     int s=f;
  33.     while(s>0){
  34.     	s/=10;
  35.     	n++;
  36.     }
  37.  
  38.     i128 x = make_num(a, n);
  39.     i128 y = make_num(b, n);
  40.  
  41.     i128 z = a;
  42.     for(int i = 1; i < n; i++)
  43.         z = z * 10 + b;
  44.  
  45.     i128 p = b;
  46.     for(int i = 1; i < n; i++)
  47.         p = p * 10 + a;
  48.  
  49.     i128 q = make_num(b, n - 1);
  50.     i128 r = make_num(a, n + 1);
  51.  
  52.     i128 F = f;
  53.  
  54.     i128 ans = min({
  55.         abs128(F - x),
  56.         abs128(F - y),
  57.         abs128(F - z),
  58.         abs128(F - p),
  59.         abs128(F - q),
  60.         abs128(F - r)
  61.     });
  62.  
  63.     cout << (long long)ans << '\n';
  64.  
  65.     return 0;
  66.     }
  67.  
  68. }
Success #stdin #stdout 0.01s 5304KB
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https://ideone.com/jHLplZ
language:
C++ (gcc 8.3)
created:
14 hours ago
visibility:
public

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