牛客 NC16644 字符串展开 模拟

#include<bits/stdc++.h>
using namespace std;
int p1, p2, p3;
string s;
bool judge_char(char x,char y)
{
	if(x>='a'&&x<='z'&&y>='a'&&y<='z')
		return 1;
	return 0;
}
bool judge_int(char x,char y)
{
	if(x>='0'&&x<='9'&&y>='0'&&y<='9')
		return 1;
	return 0;
}
int main()
{
	cin>>p1>>p2>>p3; 
	cin.ignore();
	getline(cin,s);
	for(int i=1; i<s.size()-1; i++)
	{
		if(s[i]=='-'&&(judge_char(s[i-1],s[i+1])||judge_int(s[i-1],s[i+1])))
		{
			if(s[i-1]>=s[i+1])
				continue;
			else if(s[i-1]==s[i+1]-1)
				s.erase(i,1);
			else 
			{
				string s1="";
				if(p1==1)
				{
					for(char x=s[i-1]+1;x<s[i+1];x++)
						for(int j=0;j<p2;j++)
							s1+=x;
				}
				else if(p1==2)
				{
					if(judge_char(s[i-1],s[i+1]))
						for(char x=s[i-1]+1;x<s[i+1];x++)
							for(int j=0;j<p2;j++)
								s1+=x-32;
					else
						for(char x=s[i-1]+1;x<s[i+1];x++)
						for(int j=0;j<p2;j++)
							s1+=x;
				}
				else if(p1==3)
				{
					for(char x=s[i-1]+1;x<s[i+1];x++)
						for(int j=0;j<p2;j++)
							s1+='*';
				}
				if(p3==2)
					reverse(s1.begin(),s1.end());
				s.erase(i,1);
				s.insert(i,s1);
				i+=s1.size();
			}
		} 
	}
	cout<<s;
 }