beiJing 樣例輸出3解答代碼
#include<iostream>#include<string>#include<cstring>#include<set>#include<algorithm>#include<cmath>using namespace std;int judge(string s1,string s2){	int i,len=s1.length();	for(i=0;i<len;i++)	{		if(abs(s1[i]-s2[i])==32 || abs(s1[i]-s2[i])==0)			continue;		else			return 0;	}	return 1;}int main(){    string s1,s2;	cin>>s1;	cin>>s2;	if(s1.length()!=s2.length())		cout<<1<<endl;	else if(s1.compare(s2)==0)		 cout<<2<<endl;	else if(judge(s1,s2))		cout<<3<<endl;	else cout<<4<<endl;	return 0;}