Given a Binary Tree of size **N**, your task is to complete the function **sumBt()**, that should return the sum of all the nodes of the given binary tree.

**Input:**

The function takes a single arguments as input, the reference pointer to the **root** of the binary tree.

There are **T** test cases and for each test case the function will be called separately.

**Output:**

The function should return the sum of all the nodes of the binary tree.

**Constraints:**

1<=T<=100

1<=N<=100

**Example:
Input:**

2

2

1 2 L 1 3 R

5

10 20 L 10 30 R 20 40 L 20 60 R 30 90 L

6

250

**Note:**The **Input/Ouput** format and **Example** given are used for system's internal purpose, and should be used by a user for **Expected Output** only. As it is a function problem, hence a user should not read any input from stdin/console. The task is to complete the function specified, and not to write the full code.

Author: harshitsidhwa

If you have purchased any course from GeeksforGeeks then please ask your doubt on course discussion forum. You will get quick replies from GFG Moderators there.

preparecodinginterview_dot_com | 190 |

__murugan__ | 173 |

manvimahajan20 | 140 |

xiaoyan_yunche | 139 |

ShameekAgarwal | 116 |

preparecodinginterview_dot_com | 190 |

__murugan__ | 173 |

manvimahajan20 | 166 |

SoumyaKaushik | 146 |

arpit_anshuman | 140 |

blackshadows | 5331 |

Ibrahim Nash | 5219 |

akhayrutdinov | 5111 |

mb1973 | 4929 |

Quandray | 4567 |

Login to report an issue on this page.