TapeEquilibrium

Python

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    # write your code in Python 3.6
    total = sum(A)
    pre_total = 0
    min_diff = abs(total - A[0] * 2)
    for v in A[:-1]:
        total -= v
        pre_total += v
        min_diff = min(abs(pre_total - total), min_diff)
    return min_diff