算法练习

public static void main(String[] args) {
	    Scanner sc = new Scanner(System.in);
	    int n = sc.nextInt();
	    int a[] = new int[10000];
	    int b[] = new int[10000];
	    int c[] = new int[10000];
	    int count = 0;
	    for(int i=0;i<n;i++){
	    	int d= sc.nextInt();
	 	    int k= sc.nextInt();
	 	    int f= sc.nextInt();
	    	a[i]=d;
	    	b[i]=k;
	    	c[i]=f;
	    }
	    for(int i=0;i<n;i++){
	    	for(int j=0;j<n;j++){
	    		if(a[j]>a[i]&&b[j]>b[i]&&c[j]>c[i]){
	    			count++;
	    			break;
	    		}
	    	}
	    }
	    System.out.println(count);
	}