func_code_string: #include <bits/stdc++.h>   using namespace std;   int n, m;   long long int arr[100050];   vector<vector<long long int>> v(100050);   int main() {     cin >> n >> m;     for (int i = 1; i <= m; i++) cin >> arr[i];     for (int i = 1; i <= m; i++) {       if (i > 1 && arr[i - 1] != arr[i]) v[arr[i]].push_back(arr[i - 1]);       if (i < m && arr[i] != arr[i + 1]) v[arr[i]].push_back(arr[i + 1]);     }     long long int sum = 0, ans;     for (int i = 1; i < m; i++) sum += abs(arr[i] - arr[i + 1]);     ans = sum;     for (int i = 1; i <= n; i++) {       if (v[i].size() == 0) continue;       sort(v[i].begin(), v[i].end());       long long int y = v[i][v[i].size() / 2];       long long int before = 0, after = 0;       for (int x : v[i]) {         before += abs(x - i);         after += abs(y - x);       }       ans = min(ans, sum - before + after);     }     cout << ans;     return 0;   }   