Geeksforgeeks

Error

×

Leaderboard

Showing:

Handle | Score |
---|---|

@Ibrahim Nash | 6379 |

@blackshadows | 6329 |

@mb1973 | 5358 |

@Quandray | 5231 |

@akhayrutdinov | 5111 |

@saiujwal13083 | 4510 |

@sanjay05 | 3762 |

@marius_valentin_dragoi | 3522 |

@sushant_a | 3459 |

@verma_ji | 3357 |

@KshamaGupta | 3318 |

Complete Leaderboard | |

Handle | Score |

@ritiksethi21 | 1050 |

@aroranayan999 | 807 |

@RizulBansal | 685 |

@ashishtrehan002 | 538 |

@hemantgarg923 | 528 |

@simrangoyal | 526 |

@ronaldo77 | 520 |

@thanosagain | 505 |

@anishrajan | 505 |

@ssparteek470 | 495 |

@rahul2312 | 491 |

Complete Leaderboard |

Given a tree with **N** nodes rooted at **1**. Each node labeled with a value **arr[i]**. The task is to find the absolute difference between the sum of values of nodes at even level and odd level

**Note:** All the nodes are numbered from 1 to N.

**Input: **

1. The first line of the input contains a single integer* * **T** denoting the number of test cases. The description of **T** test cases follows.

2. The first line of each test case contains a single integer** N****.**

3. The next line contains **N** space-separated positive integers represents the node value.

4. Next **N-1** lines contain two space-separated integers **u** and **v,** represents an edge in between them

**Output:** For each test case, print the answer

**Constraints:**

1. 1 <= T <= 5

2. 1 <= N <= 10^{5}

3. 1 <= arr[i] <= 10^{5}

**Example:
Input:**

2

4

1 2 3 4

1 2

3 4

4 1

5

1 2 1 2 1

1 2

2 3

3 4

4 5

**Output:**

2

1

Login to report an issue on this page.

We strongly recommend solving this problem on your own before viewing its editorial. Do you still want to view the editorial?

Yes
Tree and Level

...