Algorithm for truck moving around a circle of gas stations

Question

You have a truck moving around a circular track with gas stations spaced out around the circle. Each station has a finite amount of gas. The gas tank on the truck is infinit

Answer 1

static int findIndex(int A[], int B[]) {
    int N = A.length;
    int start=0;
    boolean isBreak=false;
    int total = 0;
    do {
        for(int i=start;i