Buggy python submission (verdict: Time Limit Exceeded):
import sys

stdin = sys.stdin

ni = lambda: int(ns())
na = lambda: list(map(int, stdin.readline().split()))
ns = lambda: stdin.readline().rstrip()  # ignore trailing spaces

n, k = na()
xli = na()
li = []
ans = 1000000000
idx = -1
for i in range(n):
    if xli[i] > 0:
        idx = i
        break
if idx == -1:
    print(abs(xli[-k]))
elif idx == 0:
    print(abs(xli[k-1]))
else:
    for i in range(max(idx - k, 0), min(idx+1, n-k+1)):
        t = xli[i:i + k]
        if t[0] * t[-1] < 0:
            ans = min(ans, 2 * abs(t[0]) + abs(t[-1]), abs(t[0]) + 2 * abs(t[-1]))
        else:
            if t[0] <= 0:
                ans = min(ans, abs(t[0]))
            else:
                ans = min(ans, abs(t[-1]))
    print(ans)


Fixed submission:
import sys

stdin = sys.stdin

ni = lambda: int(ns())
na = lambda: list(map(int, stdin.readline().split()))
ns = lambda: stdin.readline().rstrip()  # ignore trailing spaces

n, k = na()
xli = na()
li = []
ans = 1000000000
idx = -1
for i in range(n):
    if xli[i] > 0:
        idx = i
        break
if idx == -1:
    print(abs(xli[-k]))
elif idx == 0:
    print(abs(xli[k-1]))
else:
    for i in range(max(idx - k, 0), min(idx+1, n-k+1)):
        if xli[i] * xli[i + k -1] < 0:
            ans = min(ans, 2 * abs(xli[i]) + xli[i + k -1], abs(xli[i]) + 2 * xli[i + k -1])
        else:
            if xli[i + k -1] <= 0:
                ans = min(ans, abs(xli[i]))
            else:
                ans = min(ans, abs(xli[i + k -1]))
    print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
import sys

stdin = sys.stdin

ni = lambda: int(ns())
na = lambda: list(map(int, stdin.readline().split()))
ns = lambda: stdin.readline().rstrip()  # ignore trailing spaces

n, k = na()
xli = na()
li = []
ans = 1000000000
for i in range(n - k + 1):
    t = xli[i:i + k]
    if t[0] * t[-1] < 0:
        ans = min(ans, 2 * abs(t[0]) + abs(t[-1]), abs(t[0]) + 2 * abs(t[-1]))
    else:
        if t[0] <= 0:
            ans = min(ans, abs(t[0]))
        else:
            ans = min(ans, abs(t[-1]))
print(ans)


Fixed submission:
import sys

stdin = sys.stdin

ni = lambda: int(ns())
na = lambda: list(map(int, stdin.readline().split()))
ns = lambda: stdin.readline().rstrip()  # ignore trailing spaces

n, k = na()
xli = na()
li = []
ans = 1000000000
idx = -1
for i in range(n):
    if xli[i] > 0:
        idx = i
        break
if idx == -1:
    print(abs(xli[-k]))
elif idx == 0:
    print(abs(xli[k-1]))
else:
    for i in range(max(idx - k, 0), min(idx+1, n-k+1)):
        if xli[i] * xli[i + k -1] < 0:
            ans = min(ans, 2 * abs(xli[i]) + xli[i + k -1], abs(xli[i]) + 2 * xli[i + k -1])
        else:
            if xli[i + k -1] <= 0:
                ans = min(ans, abs(xli[i]))
            else:
                ans = min(ans, abs(xli[i + k -1]))
    print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
import sys

stdin = sys.stdin

ni = lambda: int(ns())
na = lambda: list(map(int, stdin.readline().split()))
ns = lambda: stdin.readline().rstrip()  # ignore trailing spaces

n, k = na()
xli = na()
li = []
ans = 1000000000
for i in range(n - k + 1):
    t = xli[i:i + k]
    if t[0] * t[-1] < 0:
        ans = min(ans, 2 * abs(t[0]) + abs(t[-1]), abs(t[0]) + 2 * abs(t[-1]))
    else:
        if t[0] <= 0:
            ans = min(ans, abs(t[0]))
        else:
            ans = min(ans, abs(t[-1]))
print(ans)

Fixed submission:
import sys

stdin = sys.stdin

ni = lambda: int(ns())
na = lambda: list(map(int, stdin.readline().split()))
ns = lambda: stdin.readline().rstrip()  # ignore trailing spaces

n, k = na()
xli = na()
li = []
ans = 1000000000
idx = -1
for i in range(n):
    if xli[i] > 0:
        idx = i
        break
if idx == -1:
    print(abs(xli[-k]))
elif idx == 0:
    print(abs(xli[k-1]))
else:
    for i in range(max(idx - k, 0), min(idx+1, n-k+1)):
        if xli[i] * xli[i + k -1] < 0:
            ans = min(ans, 2 * abs(xli[i]) + xli[i + k -1], abs(xli[i]) + 2 * xli[i + k -1])
        else:
            if xli[i + k -1] <= 0:
                ans = min(ans, abs(xli[i]))
            else:
                ans = min(ans, abs(xli[i + k -1]))
    print(ans)