public class Solution {
    public static int tapeEquilibrium(int[] a) {
        long firstPart = 0;
        long secondPart = 0;
        for (int v : a) {
            secondPart += v;
        }

        long min = Long.MAX_VALUE;
        for (int i = 0; i < a.length - 1; i++) {
            firstPart += i;
            secondPart -= i;
            long difference = Math.abs(firstPart - secondPart);
            min = Math.min(min, difference);
        }

        return (int) min;
    }
}