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Calculate a+b and output the sum in standard format -- that is, the digits must be separated into groups of three by commas (unless there are less than four digits).

Input Specification:

Each input file contains one test case. Each case contains a pair of integers a and b where −10​6​​≤a,b≤10​6​​. The numbers are separated by a space.

Output Specification:

For each test case, you should output the sum of a and b in one line. The sum must be written in the standard format.

Sample Input:

-1000000 9

Sample Output:

-999,991

C++ 代码如下：

#include 
   
    #include 
    
     #include 
     
      #include 
      
       #include 
       
        #include 
        
         using namespace std;stack
         
          re;int a,b,c;int flag=0;int main(){ scanf("%d%d",&a,&b); int c=a+b; if(c==0) { printf("0\n"); return 0; } if(c>0) flag=1; while (c) { re.push(c%1000); c/=1000; } if(!flag) printf("-"); int Size=re.size(); for (int i=0;i
         
        
       
      
     
    
   

Java 代码如下：

public class Adv1001 {    public static void main(String[] args) {        Scanner sc = new Scanner(System.in);        int a,b,sum,flag=0;        a = sc.nextInt();        b = sc.nextInt();        sum = a+b;        if(sum<0) flag=1;        sum = Math.abs(sum);        if(sum==0)        {            System.out.println(sum);            return ;        }        List
   
     list = new ArrayList<>();        if(flag==1) System.out.print("-");        while(sum!=0)        {            list.add(sum%1000);            sum/=1000;        }        if(list.size()==1) {            System.out.println(list.get(0));            return ;        }        for (int i=list.size()-1;i>=0;i--)        {            if(i!=list.size()-1)            {                if(list.get(i)>=100) System.out.print(list.get(i));                else if(list.get(i)>=10) System.out.print("0"+list.get(i));                else  System.out.print("00"+list.get(i));            }            else System.out.print(list.get(i));            if(i!=0) System.out.print(",");        }        System.out.println();    }}
   

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