面积

import java.util.*;
import java.math.BigInteger;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int max_x=Integer.MIN_VALUE,max_y=Integer.MIN_VALUE,min_x=Integer.MAX_VALUE,min_y=Integer.MAX_VALUE;
        int x =0,y=0;
        for(int i =0;i<n;i++){
            x=sc.nextInt();
            y=sc.nextInt();
            max_x = Math.max(x,max_x);
            max_y = Math.max(y,max_y);
            min_x = Math.min(x,min_x);
            min_y = Math.min(y,min_y);
        }        
        int max=Math.max(max_x-min_x,max_y-min_y);
        BigInteger width = new BigInteger(max+"");
        System.out.println(width.multiply(width));
    }
}

 

 

import java.util.*;
public class Main{    
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        if(n<=2){
            System.out.println(-1);
            return;
        }
        int[] lens=new int[n];
        int sum =0,max=Integer.MIN_VALUE;
        for(int i =0;i<n;i++){
            lens[i]=sc.nextInt();
            max = Math.max(max,lens[i]);
            sum+=lens[i];
            if((sum-max)>max){//最大边大于其他边之和即可满足有要求
                System.out.println(i+1);
                return;
            }
        } 
        System.out.println(-1);
        
    }
}