Hello,

I have no idea how this is failing. It works perfectly fine from my terminal.

I am currently having a runtime error on Tree construction: http://codeforces.com/problemset/problem/675/D

g++ --version Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1 Apple LLVM version 7.3.0 (clang-703.0.29) Target: x86_64-apple-darwin15.4.0 Thread model: posix InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

Error: Test: #1, time: 0 ms., memory: 2000 KB, exit code: -1073741819, checker exit code: 0, verdict: RUNTIME_ERROR Checker: null

Here are all my latest submissions: http://codeforces.com/submissions/Singledigit

Code

/* CodeForces Problem 675D
 * http://codeforces.com/problemset/problem/675/D
 * Objective: Create BST and Print out Parent nodes
 */
#include <vector>
#include <iostream>
using namespace std;

class tree{
   public: 
      long long val;
      tree *left, *right, *parent;
   public:
      tree(long long k, tree* l, tree* r){
         val = k;
         left = l;
         right = r;
      }
      tree(long long k, tree* p){
         val = k;
         left = right = NULL;
         parent = p;
      }
};

void insert(tree*& t, long long k, tree* p){
   if(t==NULL){
      t = new tree(k, p);
      if(p!=NULL) cout << p->val << " ";
      return;
   }else if(k > t->val){
      insert(t->right, k, t);
   }else if(k < t->val){
      insert(t->left, k, t);
   }
}

int main(){
   
   int size;
   cin >> size;
   tree* t;
   vector<long long> nodes;
   
   int i=0;
   while(i<size){
      long long temp; 
      cin>>temp;
      nodes.push_back(temp);
      i++;
   }

   for(i = 0;i<nodes.size();i++)
      insert(t,nodes.at(i), NULL);
   
   cout<<endl; 
   return 0;
}