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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define int              long long int
  4. #define double           long double
  5. #define print(a)         for(auto x : a) cout << x << " "; cout << endl
  6. inline int power(int a, int b) {
  7.     int x = 1;
  8.     while (b) {
  9.         if (b & 1) x *= a;
  10.         a *= a;
  11.         b >>= 1;
  12.     }
  13.     return x;
  14. }
  15.  
  16.  
  17. const int M = 1000000007;
  18. const int N = 3e5+9;
  19. const int INF = 2e9+1;
  20. const int LINF = 2000000000000000001;
  21.  
  22. //_ ***************************** START Below *******************************
  23.  
  24. vector<int> a;
  25. vector<int> b;
  26.  
  27.  
  28. bool isPossible(int n, int m, int mid){
  29.  
  30.     for(int i=0; i<n; i++){
  31.         int val = a[i];
  32.         int minR = a[i]-mid;
  33.         int maxR = a[i]+mid;
  34.  
  35.         auto maxCt = lower_bound(begin(b), end(b), maxR) - begin(b);
  36.         auto minCt = lower_bound(begin(b), end(b), minR) - begin(b);
  37.  
  38.         if((maxCt<m && b[maxCt] == maxR) || (minCt<m && b[minCt] == minR)) {
  39.             continue;
  40.         }
  41.  
  42.         if(maxCt - minCt <= 0) return false;
  43.  
  44.     }
  45.  
  46.     return true;
  47. }
  48.  
  49. int consistency(int n, int m){
  50.  
  51.     int s = 0, e = INF;
  52.     int ans = INF;
  53.     while(s<=e){
  54.         int mid = s + (e-s)/2;
  55.  
  56.         if(isPossible(n, m, mid)){
  57.             ans = min(ans, mid);
  58.             e = mid-1;
  59.         }
  60.         else s = mid+1;
  61.     }
  62.  
  63.     return ans;
  64.  
  65. }
  66.  
  67. void solve() {
  68.  
  69.     int n, m;
  70.     cin>>n>>m;
  71.     a.resize(n);
  72.     b.resize(m);
  73.  
  74.     for(int i=0; i<n; i++) cin >> a[i];
  75.     for(int i=0; i<m; i++) cin >> b[i];
  76.     cout << consistency(n, m) << endl;
  77.  
  78.  
  79. }
  80.  
  81.  
  82.  
  83.  
  84.  
  85. int32_t main() {
  86.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  87.  
  88.     int t = 1;
  89.     cin >> t;
  90.     while (t--) {
  91.         solve();
  92.     }
  93.  
  94.     return 0;
  95. }
Success #stdin #stdout 0.01s 5316KB
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https://ideone.com/SUjJnF
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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