【leetcode】公交站间的距离

int distanceBetweenBusStops(int* distance, int distanceSize, int start, int destination){
    int dst1=0,dst2=0;
    int i=start;
    while(i%distanceSize != destination){
        dst1+=distance[i%distanceSize];
        i++;
    }
    i=start;
    while(i%distanceSize != destination){      
        i--;
        if(i<0)
            i=distanceSize-1;
        dst2+=distance[i%distanceSize];
    }
    return (dst1<dst2)?dst1 :dst2;
}