#include <iostream> using namespace std;
int main()
{
const int SIZE = 100;
int n, f, i, left, right, middle, a[SIZE];
cin>>n>>f;
for (i = 1; i <= n; i++)
cin>>a[i];
left = 1;
right = n;
do {
middle = (left + right) / 2;
if (f <= a[middle])
right = middle;
else
left = middle + 1;
} while (left < right); cout<<left<<endl; return 0;
}输入：
12 17
2 4 6 9 11 15 17 18 19 20 21 25
输出：_________