11507 - Bender B. Rodríguez Problem/b.cpp

   1 /*
   2   Accepted
   3 */
   4 #include<iostream>
   5 #include<string>
   6 #include<cassert>
   7
   8 using namespace std;
   9 int encode(string s){
  10     if(s=="+y") return 0;
  11     if(s=="-y") return 1;
  12     if(s=="+z") return 2;
  13     if(s=="-z") return 3;
  14     assert(0);
  15 }
  16 string decode(int n){
  17     if(n==0)return "+y";
  18     if(n==1)return "-y";
  19     if(n==2)return "+z";
  20     if(n==3)return "-z";
  21     if(n==4)return "+x";
  22     if(n==5)return "-x";
  23     assert(0);
  24 }
  25 int main(){
  26   //assert(freopen("bender.in", "r", stdin) != NULL);
    int move[6][4]={{5,4,0,0},
  27                     {4,5,1,1},
  28                     {2,2,5,4},
  29                     {3,3,4,5},
  30                     {0,1,2,3},
  31                     {1,0,3,2}};
  32     int n;
  33     while(cin>>n &&n){
  34          int s=4;
  35          string in;
  36          for(int i=1;i<n;++i){
  37              cin>>in;
  38              if(in!="No"){
  39                 s=move[s][encode(in)];
  40              }
  41          }
  42          cout<<decode(s)<<endl;
  43     }
  44     return 0;
  45 }