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刷算法题的AC代码保存在这里，以备日后查询。代码的插入顺序类似于栈。

//2016年5月14日00:01:51
#include<bits/stdc++.h>
#define ll long long
using namespace std;
int main()
{
    stringstream ssm;
    string strA;
    string strAns;
    ll a,b;
    bool isNegative=0;

    cin>>a>>b;

    a+=b;

    a<0?(isNegative=1):(isNegative=0);

    a=abs(a);
    ssm<<a;
    ssm>>strA;

    for(int i=strA.length()-1,j=1; i>0; i--,j++)
    {
        strAns=strA[i]+strAns;
        if(j%3==0)
        {
            strAns=","+strAns;
        }
    }
    strAns=strA[0]+strAns;

    isNegative==1?(cout<<"-"<<strAns):(cout<<strAns);

    return 0;
}

//网上看到的别人的代码http://www.nowcoder.com/profile/899290/codeBookDetail?submissionId=149259
#include <stdio.h>
int main()
{
  int a,b;
  int sum;
  while(scanf("%d%d
",&a,&b) != EOF){
        sum = a+b;
    if(sum < 0){
    printf("-");
    sum = -sum;
    }
    if(sum>=1000000){
        printf("%d,%03d,%03d
",sum/1000000, (sum/1000)%1000, sum%1000);
    }
    else if(sum >= 1000){
        printf("%d,%03d
",sum/1000,sum%1000);
    } else{
        printf("%d
", sum);
    }
  }
  return 0;
}

#include<iostream>
using namespace std;
int main()
{
	int floor=0;
	int eleFloor=0;
	int arrFloor[99999]={0};
	int top=1; 
	
	while(cin>>floor)
	{
		int f=1;//floor is new
		for(int i=1;i<top;i++)
		{
			if(floor==arrFloor[i])
			{
				f=0;
				break;
			}
		}
		
		if(f==1)
		{
			arrFloor[top++]=floor;
		}
		
		if(elefloor-floor <0)
		{
			-(elefloor-floor)*6+5;
		}
	}
}

#include<iostream>
using namespace std;
int main()
{
	int floor=0;
	int eleFloor=0;
	int sumTime=0;
	int arrOldFloor[99999]={0};
	int top=1; 
	
	while(cin>>floor)
	{
		if(arrOldFloor[floor]==0)
		{
			arrOldFloor[floor]=1;
			
			if(eleFloor-floor <0)
			{
				sumTime+=(-(eleFloor-floor))*6+5;
			}
			
			if(eleFloor-floor >0)
			{
				sumTime+=(eleFloor-floor)*4+5;
			}
		}
		
		
	}
	cout<<sumTime;
}

#include<bits/stdc++.h>
using namespace std;
int main()
{
    string engNum[]={"zero","one","two","three","four","five","six","seven","eight","nine"};
    stringstream ssm;
    string strNum,strSum;
    int sum=0;
     
    cin>>strNum;
     
    for(int i=0;i<strNum.length();i++)
    {
        sum+=(strNum[i]-'0');
    }
     
    ssm<<sum;
    ssm>>strSum;
     
    for(int i=0;i<strSum.length()-1;i++)
    {
        cout<<engNum[strSum[i]-'0']<<" ";
    }
    cout<<engNum[strSum[strSum.length()-1]-'0'];
     
     
    return 0;
}