Equilibrium index of an array is an index such that the sum of elements at lower indexes is equal to the sum of elements at higher indexes . Now Given an array your task is to complete the function **findEquilibrium** which returns the index of the first Equilibrium point in the array. The function takes two arguments. The first argument is the array A[ ] and the second argument is the size of the array A.

**Input Format:**

The first line of input takes an integer T denoting the no of test cases, then T test cases follow. The first line of each test case is an integer N denoting The size of the array . Then in the next line are N space separated values of the array.

**Output Format:**

For each test case output will be the equilibrium index of the array .If no such index exist output will be -1.

**Task :**

Your task is to complete the function (**findEquilibrium**) below and return the index with required return type.

**Constraints:**

1<=T<=100

1<=N<=100

-100<=A[]<=100

**Example(To be used only for expected output):
Input**

2

4

1 2 0 3

4

1 1 1 1

2

-1

Author: Shubham Joshi 1

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.

vamsikrishna55 | 122 |

UrGuru | 117 |

Vagesh Verma | 112 |

chaolinyu | 96 |

Akhil varma | 93 |

abducodes | 634 |

harshtyagi36 | 302 |

highway_to_hell | 252 |

rajeswarii | 248 |

Akhil varma | 246 |

blackshadows | 5331 |

Ibrahim Nash | 5219 |

akhayrutdinov | 5111 |

mb1973 | 4929 |

Quandray | 4567 |

Login to report an issue on this page.