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#include <iostream>

#include <vector>

#include <algorithm>

using namespace std;

struct TreeNode {

int val;

TreeNode *left;

TreeNode *right;

TreeNode(int x) : val(x), left(NULL), right(NULL) {}

};

class Solution {

public:

string tree2str(TreeNode* t) {

if (t == NULL)

return string();

if (t->left == NULL)

{

if (t->right == NULL)

{

return to_string(t->val);

}

else

{

return to_string(t->val)+"()("+tree2str(t->right)+")";

}

}

else

{

if (t->right == NULL)

return to_string(t->val)+"("+tree2str(t->left)+")";

else

return to_string(t->val)+"("+tree2str(t->left)+")("+tree2str(t->right)+")";

}

}

};

int main()

{

Solution solution;

return 0;

}