二分查找
private int BinarySearch(List<int> list,int value)
{
int low = 0;
int high = list.Count - 1;
int middle = 0;
while(low<=high)
{
middle = (high-low)/2+low;
if(list[middle]>value)
high = middle-1;
else if(list[middle]<value)
low = middle+1;
else
return middle;
}
return -1;
}
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