import sys
from collections import defaultdict

read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

N, K, *A = map(int, read().split())
nums = defaultdict(int)
sums = defaultdict(int)

answer = 0

def f(K, A, B):
    global answer
    INF = 10**9 + 10
    # B の状態
    
    nums.clear()
    sums.clear()
    p = 0

    ret = 0
    # A の状態
    min_value, min_cnt = INF, 1
    for i, a in enumerate(A, 1):
        if a == min_value:
            min_cnt += 1
        elif a < min_value:
            min_value = a
            min_cnt = 1
        if min_cnt >= 2:
            continue
        while p < len(B):
            b = B[p]
            if b > min_value:
                nums[b] += 1
                sums[b] += p + 1
            else:
                break
            p += 1
        key = K - a
        if key in nums:
            answer += nums[key] * i + sums[key]

def solve(K, A, L, R):
    # 半開区間[L,R)
    if R - L == 1:
        answer += A[L] * 2 == K
        return
    M = (L + R) // 2
    solve(K, A, L, M) + solve(K, A, M, R)
    # あとはM-1, Mを含むような解を求める。一意な最小値がどちらにあるかで。
    left_nums = A[L:M][::-1]
    right_nums = A[M:R]
    f(K, left_nums, right_nums)
    f(K, right_nums, left_nums)
    
solve(K, A, 0, N)
print(answer)