Method swap

app/src/main/java/cs/threephase/Edge3.java:520–527

(int[] arr, int a, int b, int c, int d)

    }

    void swap(int[] arr, int a, int b, int c, int d) {
        tempi = arr[a];
        arr[a] = arr[c];
        arr[c] = tempi;
        tempi = arr[b];
        arr[b] = arr[d];
        arr[d] = tempi;
    }

    void swapx(int x, int y) {
        tempi = edge[x];