题解 | #字符串加密#

#include <iostream>
#include <bits/stdc++.h>
#include <vector>
using namespace std;

int main() {
    string str;
    cin>>str;
    set<char> set;
    string S = "";
    int index = 0;
    for (char ch : str){
        if (set.find(ch) != set.end())
            continue;
        S += ch;
        set.insert(ch);
    }
    for (char a = 'a'; a <= 'z'; a++){
        if (set.find(a) != set.end())
            continue;
        S += a;
    }
    string word;
    cin>>word;
    string result = "";
    for (auto ch : word){
        result += S[ch - 'a'];
    }
    cout<<result;
}
// 64 位输出请用 printf("%lld")