Java题解：

import java.util.*;
import java.io.*;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String[] first = br.readLine().split(" ");
        int r = Integer.parseInt(first[0]);
        int c = Integer.parseInt(first[1]);
        int n = Integer.parseInt(first[2]);
        
        char[][] g = new char[r + 2][c + 2];
        char[][] robotPos = new char[r + 2][c + 2];
        
        // 读取网格
        for (int i = 1; i <= r; i++) {
            String line = br.readLine();
            for (int j = 1; j <= c; j++) {
                g[i][j] = line.charAt(j - 1);
                robotPos[i][j] = '.';
            }
        }
        
        // 机器人数组
        int[] robotR = new int[n + 1];
        int[] robotC = new int[n + 1];
        int[] robotDir = new int[n + 1];
        boolean[] hasItem = new boolean[n + 1];
        char[] holding = new char[n + 1];
        
        for (int i = 1; i <= n; i++) {
            String[] parts = br.readLine().split(" ");
            robotR[i] = Integer.parseInt(parts[0]);
            robotC[i] = Integer.parseInt(parts[1]);
            robotDir[i] = Integer.parseInt(parts[2]);
            robotPos[robotR[i]][robotC[i]] = '@';
        }
        
        int k = Integer.parseInt(br.readLine());
        int ans = 0;
        int[][] dirs = {{-1, 0}, {0, 1}, {1, 0}, {0, -1}};
        
        for (int t = 0; t < k; t++) {
            String[] parts = br.readLine().split(" ");
            int id = Integer.parseInt(parts[0]);
            char op = parts[1].charAt(0);
            
            int cr = robotR[id];
            int cc = robotC[id];
            int cd = robotDir[id];
            
            if (op == 'F') {
                int nr = cr + dirs[cd][0];
                int nc = cc + dirs[cd][1];
                if (nr >= 1 && nr <= r && nc >= 1 && nc <= c && 
                    g[nr][nc] != '#' && robotPos[nr][nc] != '@') {
                    robotPos[cr][cc] = '.';
                    robotPos[nr][nc] = '@';
                    robotR[id] = nr;
                    robotC[id] = nc;
                    ans++;
                }
            } else if (op == 'L') {
                robotDir[id] = (cd + 3) % 4;
                ans++;
            } else if (op == 'R') {
                robotDir[id] = (cd + 1) % 4;
                ans++;
            } else if (op == 'P') {
                if (!hasItem[id] && g[cr][cc] >= 'A' && g[cr][cc] <= 'Z') {
                    hasItem[id] = true;
                    holding[id] = g[cr][cc];
                    g[cr][cc] = '.';
                    ans++;
                }
            } else if (op == 'D') {
                if (hasItem[id] && g[cr][cc] == '.') {
                    hasItem[id] = false;
                    g[cr][cc] = holding[id];
                    holding[id] = ' ';
                    ans++;
                }
            }
        }
        
        System.out.println(ans);
        for (int i = 1; i <= r; i++) {
            for (int j = 1; j <= c; j++) {
                System.out.print(g[i][j]);
            }
            System.out.println();
        }
    }
}