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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. // Speed
  5. #define fast_io ios::sync_with_stdio(0); cin.tie(0); cout.tie(0)
  6.  
  7. // Typedefs
  8. #define int long long
  9. #define pb push_back
  10. #define ff first
  11. #define ss second
  12. #define all(x) (x).begin(), (x).end()
  13. #define rall(x) (x).rbegin(), (x).rend()
  14. #define sz(x) ((int)(x).size())
  15. #define endl '\n'
  16. #define yes cout << "yes\n"
  17. #define no cout << "no\n"
  18.  
  19. // Loops
  20. #define rep(i,a,b) for(int i=a;i<b;++i)
  21. #define per(i,a,b) for(int i=b-1;i>=a;--i)
  22. #define each(x, a) for (auto& x : a)
  23.  
  24. // Consts
  25. const int INF = 1e18;
  26. const int MOD = 1e9+7;
  27. const int N = 2e5 + 5;
  28.  
  29. // Math
  30. int gcd(int a, int b) { return b == 0 ? a : gcd(b, a % b); }
  31. int lcm(int a, int b) { return (a / gcd(a, b)) * b; }
  32.  
  33. int power(int a, int b, int m = MOD) {
  34.     int res = 1;
  35.     while (b > 0) {
  36.         if (b & 1) res = res * a % m;
  37.         a = a * a % m;
  38.         b >>= 1;
  39.     }
  40.     return res;
  41. }
  42.  
  43. int modinv(int a, int m = MOD) {
  44.     return power(a, m - 2, m);
  45. }
  46.  
  47. // Logic
  48. void solve() {
  49.     // Code
  50.     int n;
  51.     cin>>n;
  52.     vector <int> a(n);
  53.     rep(i,0,n) cin>>a[i];
  54.     int maximum=0,b,sum=0;
  55.     rep(i,1,n-1){
  56.     	sum+=abs(a[i]-a[i+1]);
  57.     	maximum=max(maximum,abs(a[i]-a[i+1])+abs(a[i]-a[i-1]));
  58.     	if(maximum==abs(a[i]-a[i+1])+abs(a[i]-a[i-1])) b=abs(a[i]-a[i+1])+abs(a[i]-a[i-1]);
  59.     }
  60.     sum+=abs(a[0]-a[1]);
  61.     maximum=max(b,max(abs(a[0]-a[1]),abs(a[n-1]-a[n-2])));
  62.     cout<<sum-maximum<<endl;
  63. }
  64.  
  65. // Main
  66. int32_t main() {
  67.     fast_io;
  68.  
  69.     int t;
  70.     cin >> t;
  71.     while (t--) {
  72.         solve();
  73.     }
  74.  
  75.     return 0;
  76. }
  77.  
Success #stdin #stdout 0.01s 5288KB
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https://ideone.com/n5aKIw
language:
C++ (gcc 8.3)
created:
5 days ago
visibility:
public

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