TapeEquilibrium_2.cs

using System;
using System.Linq;
// you can also use other imports, for example:
// using System.Collections.Generic;

// you can write to stdout for debugging purposes, e.g.
// Console.WriteLine("this is a debug message");

class Solution
{
    public int solution(int[] A)
    {
        // write your code in C# 6.0 with .NET 4.5 (Mono)
        
        int N = A.Length;
        int [] sum_left = new int[N-1];
        int [] sum_right = new int[N-1];
        int [] result = new int[N-1];
        
        sum_left[0] = A[0];
        for (int i=1; i<N-1; i++)
        {
            sum_left[i] = A[i] + sum_left[i-1];
        }
        
        sum_right[0] = A[N-1];
        for (int i=1; i<N-1; i++)
        {
            sum_right[i] = A[N-1-i] + sum_right[i-1];
        }
        
        for (int i=0; i<N-1; i++)
        {
            result[i] = Math.Abs(sum_left[i] - sum_right[N-2-i]);
        }
        
        int min_diff = result.Min();
        
        return min_diff;
    }
}