HDOJ 2023 求平均成绩

import java.util.Scanner;
class Main{
    public static void main(String args[]){
        Scanner sc =new  Scanner(System.in);
        while(sc.hasNext()){
            int n =sc.nextInt();
            int m =sc.nextInt();
            int stuStr[][] = new int[n+1][m+1];
            for(int i=0;i<n;i++){
                for(int j=0;j<m;j++){
                    stuStr[i][j] = sc.nextInt();
                    stuStr[i][m] = stuStr[i][j]+stuStr[i][m];//一门课的n个学生的平均成绩
                    stuStr[n][j] = stuStr[i][j]+stuStr[n][j];//一个学生m门课的平均成绩
                }                
            }
            double nStr[] = new double[n];
            double mStr[] = new double[m];

            nStr[0] =(double)stuStr[0][m]/m;
            System.out.printf("%.2f",nStr[0]);
            for(int i=1;i<n;i++){
                nStr[i] = (double)stuStr[i][m]/m;
                System.out.printf(" %.2f",nStr[i]);
            }
            System.out.println();

            mStr[0]=(double)stuStr[n][0]/n;
            System.out.printf("%.2f",mStr[0]);
            for(int i=1;i<m;i++){
                mStr[i] = (double)stuStr[n][i]/n;
                System.out.printf(" %.2f",mStr[i]);
            }
            System.out.println();

            int sum=0;
            for(int i=0;i<n;i++){
                int sum_s = 0;
                for(int j=0;j<m;j++){
                    if(mStr[j]<=stuStr[i][j]){
                      sum_s++;
                    }
                }
                if(sum_s==m){
                     sum++;
                    }
            }
            System.out.println(sum);
            System.out.println();

        }
    }
}