思路：
分4种情况：
(1)为0或tret；
(2)输入为阿拉伯数字，除13加上取余13即可；
(3)输入为长度为3的字符串，可能是高位也可能是低位；
(4)输入为长度为7的字符串，高位*13+低位；
代码：
#include<iostream>
#include<cstdlib>
#include<string>
#include<map>
using namespace std;
int main(){
int n;
cin>>n;
cin.ignore();
string low[]={"","jan", "feb", "mar", "apr", "may", "jun", "jly", "aug", "sep", "oct", "nov", "dec"};
string high[]={"","tam", "hel", "maa", "huh", "tou", "kes", "hei", "elo", "syy", "lok", "mer", "jou"};
map<string,int> lw,hg;
for(int i=0;i<=12;i++) lw[low[i]]=hg[high[i]]=i;
for(int i=0;i<n;i++){
string s;
getline(cin,s);
if(s=="0"||s=="tret") cout<<(s=="0"?"tret
":"0
");
else if(s[0]>='0'&&s[0]<='9'){
int num=stoi(s);
string str=num>13&&num%13!=0?" ":"";
cout<<high[num/13]+str+low[num%13]<<endl;
}
else if(s.length()==3) cout<<hg[s]*13+lw[s]<<endl;
else cout<<hg[s.substr(0,3)]*13+lw[s.substr(4,3)]<<endl;
}
return 0;
}