感觉被降智了。。

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const int MAXN = 3010;
int main(){
	int k;
	cin >> k;
	string s,t;
	cin >> s >> t;
	int lens = s.size(),lent = t.size(); 
	//cout << lens << " " << lent << " " << abs(lens - lent) << endl;
	if(abs(lens - lent) > 1){
		cout << "No\n";
		return 0;
	}
	else if(lens - lent == 1){
		bool ok = false;
		for(int i = 0;i < lent;i++){
			if(s[i] != t[i]){
				if(ok){
					if(s[i + 1] != t[i]){
						cout << "No\n";
						return 0;
					}
				}
				else ok = true;
			}
		}
	}
	else if(lens - lent == -1){
		bool ok = false;
		for(int i = 0;i < lens;i++){
			if(s[i] != t[i]){
				if(ok){
					if(s[i] != t[i + 1]){
						cout << "No\n";
						return 0;
					}
				}
				else ok = true;
			}
		}
	}
	else{
		bool ok = false;
		for(int i = 0;i < lens;i++){
			if(s[i] != t[i]){
				if(ok){
					cout << "No\n";
					return 0;
				}
				ok = true;
			}
		}
	}
	cout << "Yes\n";
	return 0;
}