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  1. using namespace std;
  2. #include <cmath>
  3. #include <cstdio>
  4. #include <string>
  5. #include <vector>
  6. #include <stack>
  7. #include <queue>
  8. #include <iostream>
  9. #include <algorithm>
  10.  
  11. #define all(c) (c).begin(),(c).end()
  12. #define tr(c,i) for(typeof((c).begin()) i = (c).begin(); i != (c).end(); i++)
  13. typedef long long ll; 
  14. typedef pair<int,int> pii; 
  15. #define FOR(i,n) for (int i = 0; i < n; i++)
  16. #define SZ(x) ((int)x.size())
  17. #define PB push_back
  18. #define sf(x) scanf("%d",&x)
  19. #define pf(x) printf("%d\n",x)
  20. #define split(str) {vs.clear();istringstream ss(str);while(ss>>(str))vs.push_back(str);}
  21. struct node
  22. {
  23.   bool type;
  24.   node *left;
  25.   string op;
  26.   node *right;
  27.   node(string c, node *pl, node *pr) : op(c), left(pl), right(pr), type(false) {}
  28.   node(string c) : op(c), type(true) {}
  29. };
  30. int main()
  31. {
  32.   int t;
  33.   sf(t);
  34.   while(t--)
  35.   {
  36.     string s;
  37.     cin>>s;
  38.     //getline(cin, s);
  39.     stack<node*> mystack;
  40.     FOR(i,s.size())
  41.     {
  42.       if(s[i]>='A'&&s[i]<='Z')
  43.       {
  44. 	node *r=mystack.top();
  45. 	mystack.pop();
  46. 	node *l=mystack.top();
  47. 	mystack.pop();
  48. 	char buf[10];
  49. 	sprintf(buf,"%c",s[i]);
  50. 	mystack.push(new node((string)buf,l,r));
  51. 	continue;
  52.       }
  53.       else
  54.       {
  55.  
  56. 	char buf[10];
  57. 	sprintf(buf,"%c",s[i]);
  58. 	mystack.push(new node((string)buf));
  59.  
  60.       }
  61.     }
  62.     //cout<<"hello"<<endl;
  63.     queue<node*> q;
  64.     q.push(mystack.top());
  65.     string ans="";
  66.     while(!q.empty())
  67.     {
  68.       struct node *n=q.front();
  69.       q.pop();
  70.       if(n->type)
  71. 	ans=n->op+ans;
  72.       else
  73.       {
  74. 	ans=n->op+ans;
  75. 	q.push(n->left);
  76. 	q.push(n->right);
  77.       }
  78.     }
  79.     char *fileName = (char*)ans.c_str();
  80.     printf("%s\n",fileName);
  81.     //cout<<ans<<endl;
  82.   }
  83. }
Success #stdin #stdout 0.02s 2824KB
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abcABdefgCDEF
stdout
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wzyxIPM
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https://ideone.com/Oq9RI
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
public

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