题解 | #二分查找-II#

 * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
 *
 * 如果目标值存在返回下标，否则返回 -1
 * @param nums int整型一维数组 
 * @param numsLen int nums数组长度
 * @param target int整型 
 * @return int整型
 *
 * C语言声明定义全局变量请加上static，防止重复定义
 */
int search(int* nums, int numsLen, int target ) {
    // write code here
    int low = 0, high = numsLen-1, mid, t = -1;
    while(low <= high){
         mid = (low + high) / 2;
        if(nums[mid] == target){
            t = mid;
            high = mid-1;
        }else if(nums[mid] > target){
            high = mid-1;
        }else{
            low = mid+1;
        }
    }
    return t;
}