Language: C++

#include <bits/stdc++.h>
#define rep(i, n) for(int i = 0; i < n; ++i)
#define rrep(i, n) for(int i = n-1; i >= 0; --i)
#define fi first
#define se second
using namespace std;
typedef long long lint;
typedef unsigned int uint;
typedef unsigned long long ulint;
typedef long double ldouble;
using pii = pair<int, int>;
using pli = pair<lint, lint>;
using pdd = pair<double, double>;
using pld = pair<ldouble, ldouble>;
using v1i = vector<int>;
using v1li = vector<lint>;
using v2i = vector<vector<int>>;
using v2li = vector<vector<lint>>;
using v3i = vector<vector<vector<int>>>;
using v3li = vector<vector<vector<lint>>>;
constexpr lint mod1 = 1e9+7;

int main() {
  int h, w, m = 0;
  cin >> h >> w;
  v2i a(h, v1i(w)), b(h, v1i(w));
  rep(i, h) rep(j, w){
    cin >> a[i][j];
    m = max(m, a[i][j]);
  }
  rep(i, h) rep(j, w){
    cin >> b[i][j];
    m = max(m, b[i][j]);
  }
  v3i dp(h, v2i(w, v1i((h+w)*m+1, 0)));
  rep(i, h) rep(j, w){
    if(i == 0 && j == 0){
    }
    else if(i == 0){
      if(dp[i][j-1][k] & 1 << 0){
        if(a[i][j] + k >= b[i][j]) dp[i][j][a[i][j] + k - b[i][j]] = dp[i][j][a[i][j] + k - b[i][j]] | 1 << 0;
        if(a[i][j] + k <= b[i][j]) dp[i][j][b[i][j] - k - a[i][j]] = dp[i][j][b[i][j] - k - a[i][j]] | 1 << 1;
      }
      if(dp[i][j-1][k] & 1 << 1){
        if(a[i][j] >= b[i][j] + k) dp[i][j][a[i][j] - k - b[i][j]] = dp[i][j][a[i][j] - k - b[i][j]] | 1 << 0;
        if(a[i][j] <= b[i][j] + k) dp[i][j][b[i][j] + k - a[i][j]] = dp[i][j][b[i][j] + k - a[i][j]] | 1 << 1;
      }
    }
    else if(j == 0){
      if(dp[i-1][j][k] & 1 << 0){
        if(a[i][j] + k >= b[i][j]) dp[i][j][a[i][j] + k - b[i][j]] = dp[i][j][a[i][j] + k - b[i][j]] | 1 << 0;
        if(a[i][j] + k <= b[i][j]) dp[i][j][b[i][j] - k - a[i][j]] = dp[i][j][b[i][j] - k - a[i][j]] | 1 << 1;
      }
      if(dp[i-1][j][k] & 1 << 1){
        if(a[i][j] >= b[i][j] + k) dp[i][j][a[i][j] - k - b[i][j]] = dp[i][j][a[i][j] - k - b[i][j]] | 1 << 0;
        if(a[i][j] <= b[i][j] + k) dp[i][j][b[i][j] + k - a[i][j]] = dp[i][j][b[i][j] + k - a[i][j]] | 1 << 1;
      }
    }
    else{
      if(dp[i][j-1][k] & 1 << 0){
        if(a[i][j] + k >= b[i][j]) dp[i][j][a[i][j] + k - b[i][j]] = dp[i][j][a[i][j] + k - b[i][j]] | 1 << 0;
        if(a[i][j] + k <= b[i][j]) dp[i][j][b[i][j] - k - a[i][j]] = dp[i][j][b[i][j] - k - a[i][j]] | 1 << 1;
      }
      if(dp[i][j-1][k] & 1 << 1){
        if(a[i][j] >= b[i][j] + k) dp[i][j][a[i][j] - k - b[i][j]] = dp[i][j][a[i][j] - k - b[i][j]] | 1 << 0;
        if(a[i][j] <= b[i][j] + k) dp[i][j][b[i][j] + k - a[i][j]] = dp[i][j][b[i][j] + k - a[i][j]] | 1 << 1;
      }
        if(dp[i-1][j][k] & 1 << 0){
        if(a[i][j] + k >= b[i][j]) dp[i][j][a[i][j] + k - b[i][j]] = dp[i][j][a[i][j] + k - b[i][j]] | 1 << 0;
        if(a[i][j] + k <= b[i][j]) dp[i][j][b[i][j] - k - a[i][j]] = dp[i][j][b[i][j] - k - a[i][j]] | 1 << 1;
      }
      if(dp[i-1][j][k] & 1 << 1){
        if(a[i][j] >= b[i][j] + k) dp[i][j][a[i][j] - k - b[i][j]] = dp[i][j][a[i][j] - k - b[i][j]] | 1 << 0;
        if(a[i][j] <= b[i][j] + k) dp[i][j][b[i][j] + k - a[i][j]] = dp[i][j][b[i][j] + k - a[i][j]] | 1 << 1;
      }
    }
  }
  rep(i, (h+w)*m+1) if(dp[h-1][w-1][i] > 0){
    cout << i << endl;
    break;
  }
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:40:21: error: 'k' was not declared in this scope
   40 |       if(dp[i][j-1][k] & 1 << 0){
      |                     ^
a.cc:44:21: error: 'k' was not declared in this scope
   44 |       if(dp[i][j-1][k] & 1 << 1){
      |                     ^
a.cc:50:21: error: 'k' was not declared in this scope
   50 |       if(dp[i-1][j][k] & 1 << 0){
      |                     ^
a.cc:54:21: error: 'k' was not declared in this scope
   54 |       if(dp[i-1][j][k] & 1 << 1){
      |                     ^
a.cc:60:21: error: 'k' was not declared in this scope
   60 |       if(dp[i][j-1][k] & 1 << 0){
      |                     ^
a.cc:64:21: error: 'k' was not declared in this scope
   64 |       if(dp[i][j-1][k] & 1 << 1){
      |                     ^
a.cc:68:23: error: 'k' was not declared in this scope
   68 |         if(dp[i-1][j][k] & 1 << 0){
      |                       ^
a.cc:72:21: error: 'k' was not declared in this scope
   72 |       if(dp[i-1][j][k] & 1 << 1){
      |                     ^