[Water]Hdu 2054 A == B ?

This problem is just like java's BigInteger:

#include <iostream>
#include <string>
using namespace std;

string format(string str){
	bool zheng=true;
	int ppos=str.find('.');
	int len=str.length();
	string s1,s2;

	if(ppos!=-1){
		int ii;
		for(ii=len-1;ii>ppos;ii--){
			if(str[ii]!='0')break;
		}
		s2=str.substr(ppos,ii-ppos+1);
	}
	else ppos=len;

	int i=0;
	if(str[i]=='-'){
		zheng=false;
		i++;
	}
	for(;i<ppos;i++){
		if(str[i]!='0' ){
			s1=str.substr(i,ppos-i);
			break;
		}
	}
	if(s1=="")s1="0";
	if(s2==".")s2="";
	if(!zheng)s1="-"+s1;
	if(s1=="-0" && s2=="")s1="0";
	//cout<<"s1="<<s1<<"  s2="<<s2<<endl;
	return s1+s2;
}

int main(){
	string a,b;
	/*while(cin>>a){
		cout<<format(a)<<endl;
	}*/
	while(cin>>a>>b){
		//cout<<a<<"   "<<b<<endl;
		a=format(a);
		b=format(b);
		//cout<<"   "<<a<<"   "<<b<<"    ";
		if(a==b)cout<<"YES"<<endl;
		else cout<<"NO"<<endl;
	}
}