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  1. #include <iostream>
  2. #include <vector>
  3. #include <string>
  4. #include <algorithm>
  5. using namespace std;
  6. const int dx[8] = {1, 1, 1, 0, 0, -1, -1, -1};
  7. const int dy[8] = {1, 0, -1, 1, -1, 1, 0, -1};
  8. int main() {
  9.     for (int cs = 1;; cs++) {
  10.         int R, C; cin >> R >> C; if (R==0) return 0;
  11.         vector<string> V(R);
  12.         vector<vector<int> > dp(R, vector<int>(C, -1e9));
  13.         for (int i = 0; i < R; i++) {
  14.             cin >> V[i];
  15.         }
  16.         int res = 0;
  17.         for (char c = 'A'; c <= 'Z'; c++) {
  18.             for (int i = 0; i < R; i++) {
  19.                 for (int j = 0; j < C; j++) {
  20.                     if (V[i][j] != c) continue;
  21.                     if (c == 'A') dp[i][j] = 1;
  22.                     for (int k = 0; k < 8; k++) {
  23.                         int r = i + dx[k], c = j + dy[k];
  24.                         if (r >= 0 && c >= 0 && r < R && c < C &&
  25.                             V[r][c] == V[i][j] - 1) {
  26.                             dp[i][j] = max(dp[i][j], dp[r][c] + 1);
  27.                         }
  28.                     }
  29.                     res = max(res, dp[i][j]);
  30.                 }
  31.             }
  32.         }
  33.         cout << "Case " << cs << ": " << res << endl;
  34.     }
  35. }
Success #stdin #stdout 0s 3236KB
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4  3

ABE

CFG

BDH

ABC

0 0
stdout
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Case 1: 4
https://ideone.com/LUEQDq
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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