hdu 1022

http://acm.hdu.edu.cn/showproblem.php?pid=1022

#include<iostream>
#include<cstring>
#include<stack>
using namespace std;
int main(){
  int n,i,j,k;
  bool io[20];
  char str[20];
  char str_1[20];
  while(cin>>n>>str>>str_1){
         stack<char>train;
         i=0;j=0;k=0;
         while(i<n){
         if(train.empty()||train.top()!=str_1[i]&&j<n){
              train.push(str[j++]);
              io[k++]=1;
         }
         else if(train.top()==str_1[i]){
            train.pop();
            io[k++]=0;
            i++;
         }
         else break;
         }
         if(train.empty()){
            cout<<"Yes."<<endl;
            for(i=0;i<k;i++)
                if(io[i])
                   cout<<"in"<<endl;
                else
                   cout<<"out"<<endl;
         }
         else
            cout<<"No."<<endl;
            cout<<"FINISH"<<endl;
            
  }
  return 0;
}