题解

#include<iostream>
#include<string>
using namespace std;
int n;
string a[200]={""},b[200]={""},s="";
char c;
int main(){
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>a[i]>>b[i];
    }
    a[n+1]=b[n+1]="UNK";
    while(cin>>c){
        if(!('a'<=c&&c<='z')){
            for(int i=0;i<=n+1;i++){
                if(a[i]==s||a[i]=="UNK"){
                    cout<<b[i];
                    break;
                }
            }
            s="";
            cout<<c;
        }else{
            s+=c;
        }
    }
    for(int i=0;i<=n+1;i++){
        if(a[i]==s||a[i]=="UNK"){
            cout<<b[i];
            break;
        }
    }
    return 0;
}

把空白和UNK的情况当做翻译去写