想了半天都不明白为什么是错了答案，不是超时

import java.util.*;
public class Main{
    static int n ,m, N = 60, cnt;
    static String g[][] = new String[N][N];
    static double a[][] = new double[N][N];
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        for(int i=0;i<N ;i++) Arrays.fill(a[i], -1);

        n = sc.nextInt();
        m = sc.nextInt();
        sc.nextLine();
        for(int i=0;i<n;i++){
            String t[] = sc.nextLine().split(" ");
            for(int j=0;j<m;j++){
                g[i][j] = t[j];
                if(t[j].charAt(0) < 'A' )
                    a[i][j] = Double.parseDouble(t[j]);
                else {
                   cnt++;
                }
            }
        }
        while(true){
            for(int i=0;i<n;i++){
                for(int j=0;j<m;j++){
                    if(a[i][j] == -1){

                        String s = g[i][j];
                        String method = s.substring(0,3);
                        String script[] = s.substring(4,s.length()-1).split(":");
                        String up[] = script[0].split(",");
                        int x1 = Integer.parseInt(up[0]);
                        int y1 = Integer.parseInt(up[1]);
                        String down[] = script[1].split(",");
                        int x2 = Integer.parseInt(down[0]);
                        int y2 = Integer.parseInt(down[1]);


                        boolean flag = false; 
                        double sum = 0, count = 0;;
                        for(int x = x1-1; x < x2 ; x ++){
                            for(int y = y1-1; y < y2; y ++){
                                sum += a[x][y];
                                count += 1;
                                if(a[x][y] == -1){
                                    flag = true;
                                    break ;
                                }
                            }
                        }
                        if(flag) continue ; 
                        double avg = sum / count; 

                        if("SUM".equals(method)){
                            a[i][j] = sum;
                        }else if("AVG".equals(method)){
                            a[i][j] = avg ;
                        }else {
                            sum = 0;
                            for(int x = x1-1; x < x2 ; x ++){
                            for(int y = y1-1; y < y2; y ++){
                                sum += (a[x][y] - avg) * (a[x][y] - avg);
                            }
                            }
                            a[i][j] = Math.sqrt(sum * 1.0 / count);
                        }
                        cnt --;
                        if(cnt == 0){
                            print();
                            return ;
                        }

                    }


                }
            }
        }

    }
    static void print(){
        for(int i=0;i<n;i++){
            for(int j=0;j<m;j++){
                System.out.printf("%.2f ",a[i][j]);
            }
            System.out.println();
        }
    }
}