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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int n, k, p;
  5. vector<int> a;
  6. vector<int> b;
  7.  
  8. bool isPossible(long long T) {
  9.     int j = 0;
  10.     for (int i = 0; i < n; ++i) {
  11.         while (j < k && (abs(a[i] - b[j]) + abs(b[j] - p) > T)) {
  12.             ++j;
  13.         }
  14.         if (j >= k) return false;
  15.         ++j;
  16.     }
  17.     return true;
  18. }
  19.  
  20. int main() {
  21.  
  22.     cin >> n >> k >> p;
  23.     a.resize(n);
  24.     b.resize(k);
  25.     for (int i = 0; i < n; ++i) cin >> a[i];
  26.     for (int i = 0; i < k; ++i) cin >> b[i];
  27.  
  28.     sort(a.begin(), a.end());
  29.     sort(b.begin(), b.end());
  30.  
  31.     long long left = 0, right = 2e14, ans = 2e14;
  32.     while (left <= right) {
  33.         long long mid = (left + right) / 2;
  34.         if (isPossible(mid)) {
  35.             ans = mid;
  36.             right = mid - 1;
  37.         } else {
  38.             left = mid + 1;
  39.         }
  40.     }
  41.  
  42.     cout << ans << endl;
  43.  
  44.     return 0;
  45. }
  46.  
Success #stdin #stdout 0.01s 5300KB
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stdin 
Standard input is empty
stdout 
0
https://ideone.com/H7xDao
language:
C++14 (clang 8.0)
created:
273 days ago
visibility:
public

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