class Solution {
public int searchInsert(int[] nums, int target) {
int left=0,right=nums.length-1;
while (left<=right){
int mid = (left+right)/2;
if (nums[mid]==target)
return mid;
else if (nums[mid]<target){
left=mid+1;
}else {
right=mid-1;
}
}
return left;
}
}