Buggy python submission (verdict: Runtime Error):
import sys
input = sys.stdin.readline
import math
import copy
N, K = map(int, input().split())

mod = 10**9+7

Keys = set()
for n in range(1, int(math.sqrt(N))+2):
    Keys.add(n)
    Keys.add(N//n)

L = sorted(list(Keys))
Counts = {1: 1}
for i in range(len(L)-1):
    Counts[L[i+1]] = L[i+1]-L[i]

dp = copy.copy(Counts)
for _ in range(K-1):
    sdp = {}
    c = 0
    for l in L:
        c = (c + dp[l]) % mod
        sdp[l] = c

    for l in L:
        r = N//l
        dp[l] = sdp[r] * Counts[l] % mod

ans = 0
for v in dp.values():
    ans = (ans + v) % mod
print(ans)

Fixed submission:
N, K = map(int, input().split())
mod = 10**9+7

n = 1
A = []
while True:
    A.append(N//n)
    if N//(n+1) < n+1: break
    n += 1
A.append(n)

L = 2*n
dp = [[0]*L for _ in range(K)]
for l in range(n):
    dp[0][l] = 1

i = 0
for l in reversed(range(n, L)):
    dp[0][l] = A[i] - A[i+1]
    i += 1

for k in range(1, K):
    s = 0
    for l in reversed(range(L)):
        s = (s+dp[k-1][L-l-1]) % mod
        dp[k][l] = s * dp[0][l] % mod

ans = 0
for l in range(L):
    ans = (ans + dp[K-1][l]) % mod

print(ans)

Buggy python submission (verdict: Runtime Error):
import sys
input = sys.stdin.readline
import math
import copy
N, K = map(int, input().split())

mod = 10**9+7

Keys = set()
for n in range(1, int(math.sqrt(N))+2):
    Keys.add(n)
    Keys.add(N//n)

L = sorted(list(Keys))
Counts = {1: 1}
for i in range(len(L)-1):
    Counts[L[i+1]] = L[i+1]-L[i]

dp = copy.copy(Counts)
for _ in range(K-1):
    sdp = {}
    c = 0
    for l in L:
        c = (c + dp[l]) % mod
        sdp[l] = c

    for l in L:
        r = N//l
        dp[l] = sdp[r] * Counts[l] % mod

ans = 0
for v in dp.values():
    ans = (ans + v) % mod
print(ans)

Fixed submission:
N, K = map(int, input().split())
mod = 10**9+7

n = 1
A = []
while True:
    A.append(N//n)
    if N//(n+1) < n+1: break
    n += 1
A.append(n)

L = 2*n
dp = [[0]*L for _ in range(K)]
for l in range(n):
    dp[0][l] = 1

i = 0
for l in reversed(range(n, L)):
    dp[0][l] = A[i] - A[i+1]
    i += 1

for k in range(1, K):
    s = 0
    for l in reversed(range(L)):
        s = (s+dp[k-1][L-l-1]) % mod
        dp[k][l] = s * dp[0][l] % mod

ans = 0
for l in range(L):
    ans = (ans + dp[K-1][l]) % mod

print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
N, K = map(int, input().split())
mod = 10**9+7

n = 1
A = []
while True:
    A.append(N//n)
    if N//(n+1) < n+1: break
    n += 1
A.append(n)

L = 2*n
dp = [[0]*L for _ in range(K)]
for l in range(n):
    dp[0][l] = 1

i = 0
for l in reversed(range(n, L)):
    dp[0][l] = A[i] - A[i+1]
    i += 1

for k in range(1, K):
    s = 0
    for l in reversed(range(L)):
        s = (s+dp[k-1][L-l-1]) % mod
        dp[k][l] = s * dp[0][l] % mod

ans = 0
for l in range(L):
    ans = (ans + dp[K-1][l]) % mod

print(ans)

Fixed submission:
N, K = map(int, input().split())
mod = 10**9+7

n = 1
A = []
while True:
    A.append(N//n)
    if N//(n+1) < n+1: break
    n += 1
A.append(n)

L = 2*n
dp = [[0]*L for _ in range(K)]
for l in range(n):
    dp[0][l] = 1

i = 0
for l in reversed(range(n, L)):
    dp[0][l] = A[i] - A[i+1]
    i += 1

for k in range(1, K):
    s = 0
    for l in reversed(range(L)):
        s = (s+dp[k-1][L-l-1]) % mod
        dp[k][l] = s * dp[0][l] % mod

ans = 0
for l in range(L):
    ans = (ans + dp[K-1][l]) % mod

print(ans)