// 01001100 01001111 01010100 01000001 \\ // \\ // ╦ ╔═╗╔╦╗╔═╗ \\ // ║ ║ ║ ║ ╠═╣ \\ // ╩═╝╚═╝ ╩ ╩ ╩ \\ // \\ // 01001100 01001111 01010100 01000001 \\ #include <bits/stdc++.h> using namespace std; #define nl '\n' #define ff first #define ss second #define ll long long #define ld long double #define terminator main #define pll pair<ll,ll> #define add insert #define append push_back #define pii pair<int,int> #define all(x) (x).begin(),(x).end() #define L0TA ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL) const int N = 1e3 + 3; int a[N][N]; void solve(){ int n, m, ans; cin >> n >> m; for(int i = 1; i <= n; i++) for(int j = 1; j <= m; j++) cin >> a[i][j]; ans = -1e9; for(int i = 1; i <= n; i++) for(int j = 1; j <= m; j++) for(int p = 1; p <= n; p++) for(int q = 1; q <= m; q++) ans = max(ans, abs(a[i][j] - a[p][q]) - abs(i - p) - abs(j - q) - 1); cout << ans; } int terminator(){ L0TA; int T = 1; //cin >> T; while(T--) solve(); return 0; }