This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
//я так много думал, что опять попал
#include <bits/stdc++.h>
#define all(x) x.begin(),x.end()
#define pb push_back
#define ppb pop_back
#define pf push_front
#define ppf pop_front
#define f first
#define s second
#define left(v) v + v
#define right(v) v + v + 1
#define ub upper_bound
#define lb lower_bound
#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
using namespace std;
typedef long long ll;
//17 SEVENTEEN
const long double Pi = acos(-1.0);
const ll dx[] = {0,0,1,-1};
const ll dy[] = {1,-1,0,0};
const ll N = (ll) 1e6 + 17;
const ll M = (ll) 5e3 + 69;
const ll inf = (ll) 1e14 + 3;
const ll mod = (ll) 1e9 + 7;
ll sq(ll x) { return x * x; }
ll zxc = 1, a[M][M];
void solve() {
ll n, m, ans = -inf;
cin >> n >> m;
for(ll i = 1; i <= n; i++) {
for(ll j = 1; j <= m; j++) {
cin >> a[i][j];
}
}
for(ll i = 1; i <= n; i++) {
for(ll j = 1; j <= m; j++) {
for(ll x = i; x <= n; x++) {
for(ll y = j; y <= m; y++) {
ans = max(ans, abs(a[i][j] - a[x][y]) - (x - i + y - j + 1));
}
}
}
}
cout << ans;
}
int main(/*Уверенно*/) {
ios_base::sync_with_stdio(0);
cin.tie(0);
/*
freopen(".in", "r", stdin);
freopen(".out", "w", stdout);
*/
// cin >> zxc;
while(zxc--) {
solve();
}
return 0;
}
// さよならさ いかなくちゃ
Compilation message (stderr)
maxcomp.cpp:15: warning: ignoring '#pragma comment ' [-Wunknown-pragmas]
15 | #pragma comment(linker, "/stack:200000000")
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