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  1. /*
  2.     author: Tran Van Nam
  3.     Nguyen Trai High School - Quang Binh
  4. */
  5. #include <bits/stdc++.h>
  6. using namespace std;
  7.  
  8. const long long INF = 1e18;
  9.  
  10. signed main(){
  11.     ios_base::sync_with_stdio(0);
  12.     cin.tie(0); cout.tie(0);
  13.  
  14.     int n; cin >> n;
  15.     vector <int> a(n);
  16.     for (auto &x: a) cin >> x;
  17.  
  18.     long long l = 1, r = 1e9, ans = INF;
  19.     while (l <= r){
  20.         long long mid = l + r >> 1;
  21.         long long sum = 0;
  22.         for (auto &x: a) sum += abs(x - mid);
  23.         if (ans >= sum){
  24.             ans = sum;
  25.             r = mid - 1;
  26.         }
  27.         else l = mid + 1;
  28.     }
  29.  
  30.     cout << ans;
  31.  
  32.     return 0^0;
  33. }
  34.  
Success #stdin #stdout 0.01s 5288KB
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https://ideone.com/0ONCVo
language:
C++14 (clang 8.0)
created:
54 days ago
visibility:
secret

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