func_code_string: #include <bits/stdc++.h>   #pragma GCC optimize(2)   using namespace std;   const int INF = 1e9 + 7;   const int N = 2e5 + 7;   const int M = 1e6 + 7;   long long a[N], b[N];   long long dp[N][2];   signed main() {     ios::sync_with_stdio(false);     int n;     cin >> n;     for (int i = 1; i <= n; i++) {       cin >> a[i];       if (i > 1) b[i - 1] = abs(a[i] - a[i - 1]);     }     for (int i = 1; i <= n; i++) {       dp[i][0] = max(dp[i - 1][1] + b[i], b[i]);       dp[i][1] = max(dp[i - 1][0] - b[i], 0ll);     }     long long ans = 0;     for (int i = 1; i < n; i++) ans = max(ans, max(dp[i][0], dp[i][1]));     cout << ans << endl;     return 0;   }   