HDU 2054 A==B?

A == B ?

 

Problem Description

Give you two numbers A and B, if A is equal to B, you should print "YES", or print "NO".

 

 

Input

each test case contains two numbers A and B.

 

 

Output

for each case, if A is equal to B, you should print "YES", or print "NO".

 

 

Sample Input

1 2

2 2

3 3

4 3

 

 

Sample Output

NO

YES

YES

NO

 

 

代码：

#include<cstdio>
#include<cstring>
using namespace std;

const int maxn=100005;

int main()
{
    //freopen("in.txt","r",stdin);
    int i;
    int flag1,flag2;
    bool key1,key2,key;
    char a[maxn],b[maxn];
    while(scanf("%s%s",a,b)!=EOF)
    {
        key=true;
        key2=key1=false;
        int len1=strlen(a);
        int len2=strlen(b);
        for(i=0;i<len1;i++)
        if(a[i]=='.')
        {
            flag1=i;
            key1=true;
            break;
        }
        for(i=0;i<len2;i++)
        if(b[i]=='.')
        {
            flag2=i;
            key2=true;
            break;
        }
        //key1,key2标记两个是否有小数点 
        if(!key1&&!key2)
        if(strcmp(a,b)!=0)
        key=false; 
        //没有小数点直接比较 
        else if(key1&&!key2)
        {
            for(i=0;i<flag1;i++)
            if(a[i]!=b[i])
            {
                key=false;
                break;
            }
            if(key)
            for(i=flag1+1;i<len1;i++)
            if(a[i]!='0')
            {
                key=false;
                break;
            }
        } 
        else if(key2&&!key1)
        {
            for(i=0;i<flag2;i++)
            if(a[i]!=b[i])
            {
                key=false;
                break;
            }
            if(key)
            for(i=flag2+1;i<len2;i++)
            if(b[i]!='0')
            {
                key=false;
                break;
            }
        }
        /*两个字符串如果一个有一个没有,先比较整数部位,如果相同,再判断有小数点的
        字符串小数点后面是否都是0*/ 
        else
        {
            if(len1<len2)
            {
                for(i=len1;i<len2;i++)
                a[i]='0';
                a[i]='';
            }
            else if(len2<len1)
            {
                for(i=len2;i<len1;i++)
                b[i]='0';
                b[i]='';
            }
            else;
            if(strcmp(a,b)!=0)
            key=false;
        }
        //如果都有小数点,再较短的字符串后面补零再比较. 
        if(key)
        printf("YES
");
        else
        printf("NO
");
    }
    return 0;
}