A1060 Are They Equal [string]

题目大意：判断两个数字的科学计数法是否相等
思路：

1. 有两种类型 一是0.XXXX而是XXXX.XXXX 分别去0去小数点。
2. 判断主体和指数是否相等。

#include<vector>
#include<iostream>
#include<algorithm>
#include<unordered_map>
#include<set>
#include<map>
using namespace std;
const int N=51;
int n;
string deal(string s, int& e)
{
	int k = 0;
	while (s.length() > 0 && s[0] == '0')
	{
		s.erase(s.begin());
	}
	if (s[0] == '.')
	{
		s.erase(s.begin());
		while (s.length() > 0 && s[0] == '0')
		{
			s.erase(s.begin());
			e--;
		}
	}
	else
	{
		while (k < s.length() && s[k] != '.')
		{
			k++;
			e++;
		}
		if (k < s.length())
		{
			s.erase(s.begin() + k);
		}
	}
	if (s.length() == 0)
		e = 0;
	int num = 0;
	k = 0;
	string res;
	while (num < n)
	{
		if (k < s.length())
			res += s[k++];
		else
			res += '0';
		num++;
	}
	return res;
}
int main()
{
	string s1, s2, s3, s4;
	cin >> n >> s1 >> s2;
	int e1 = 0, e2 = 0;
	s3 = deal(s1, e1);
	s4 = deal(s2, e2);
	if (s3 == s4 && e1 == e2)
	{
		cout << "YES 0." << s3 << "*10^" << e1 << endl;
	}
	else
	{
		cout << "NO 0." << s3 << "*10^" << e1 << " 0." << s4 << "*10^" << e2 << endl;
	}
}