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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. typedef long long ll;
  4. const int Mod=998244353;
  5.  
  6.  bool f(int mid, vector<int> &b , vector<int> &a){
  7.   for(int i=0;i<a.size();i++){
  8.  
  9.     auto it =lower_bound(b.begin(),b.end(),a[i]);
  10.     int mi=1e9;
  11.     if(it!=b.end()) mi=min(mi,abs(a[i]-*it));
  12.     if(it!=b.begin()) mi=min(mi,abs(a[i]-*(--it)));
  13.  
  14.     if(mi>mid) return false;
  15.   }
  16.   return true;
  17.  }
  18.  
  19. void solve() {
  20.  
  21.    int n,m;
  22.    cin >> n >> m;
  23.    vector<int> cities(n),towers(m);
  24.    for(int i=0;i<n;i++) cin >> cities[i];
  25.    for(int i=0;i<m;i++) cin >> towers[i];
  26.  
  27.     int high=1e9,low=0,ans=0;
  28.  
  29.     while(low<=high){
  30.       int mid = (low+high)/2;
  31.       if(f(mid,towers,cities)){
  32.         ans =mid;
  33.         high=mid-1;
  34.       }
  35.       else 
  36.        low=mid+1;
  37.     }
  38.  
  39.     cout << ans << '\n';
  40. }
  41.  
  42. int main(){ 
  43.     ios::sync_with_stdio(false);
  44.     cin.tie(nullptr);
  45.  
  46.     /*int t;
  47.     cin >> t;
  48.     while (t--)*/ solve();
  49.  
  50.  
  51.     return 0;
  52. }
  53.  
Success #stdin #stdout 0.01s 5320KB
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4
https://ideone.com/hzagAf
language:
C++ (gcc 8.3)
created:
18 hours ago
visibility:
public

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