Harryxun/sft_time huggingface dataset:
### BUGGY CODE ###

k, n = map(int, input().split())

An = list(map(int, input().split()))

mn = 0
Amax = max(An)
Amin = min(An)
for i in range(len(An)):
    cal = 0
    A = An[i:]  + An[:i]
    for i in range(len(A)-1):
        if A[i] == Amax and A[i+1] == Amin:
            cal += A[i+1] + k - A[i]
        elif A[i] == Amin and A[i+1] == Amax:
            cal += A[i] + k - A[i+1]
        elif A[i+1] >= A[i]:
            cal += A[i+1] - A[i]
        else:
            cal += A[i] - A[i+1]
    if mn ==0 or mn > cal:
        mn = cal

rAn = An[:]
rAn.reverse()
for i in range(len(rAn)):
    cal = 0
    A = rAn[i:]  + rAn[:i]
    for i in range(len(A)-1):
        if A[i] == Amax and A[i+1] == Amin:
            cal += A[i+1] + k - A[i]
        elif A[i] == Amin and A[i+1] == Amax:
            cal += A[i] + k - A[i+1]
        elif A[i+1] >= A[i]:
            cal += A[i+1] - A[i]
        else:
            cal += A[i] - A[i+1]
    if mn ==0 or mn > cal:
        mn = cal
print(mn)

### FIXED CODE ###

k, n = map(int, input().split())
 
An = list(map(int, input().split()))
 
node = [An[i+1] - An[i]  for i in range(len(An) - 1)]
 
node = node[:] + [k - An[n-1] + An[0]]
 
print(k - max(node))
### BUGGY CODE ###

h,w=map(int,input().split())
s=[["#"]*(w+2)]+[["#"]+list(input())+["#"]for i in range(h)]+[["#"]*(w+2)]
p=[[1,1]]
d=0
for i in range(1,h+1):
    for j in range(1,w+1):
        if s[i][j]==".":
            d+=1
s[1][1]="#"
k=0
while [h,w] not in p:
    k+=1
    g=[]
    for i in range(len(p)):
        x,y=p[i][0],p[i][1]
        if s[x-1][y]==".":
            s[x-1][y]="Q"
            g.append([x-1,y])
        if s[x+1][y]==".":
            s[x+1][y]="Q"
            g.append([x+1,y])
        if s[x][y+1]==".":
            s[x][y+1]="Q"
            g.append([x,y+1])
        if s[x][y-1]==".":
            s[x][y-1]="Q"
            g.append([x,y-1])
    else:
        p=g
print(d-k-1)

### FIXED CODE ###

h,w=map(int,input().split())
s=[["#"]*(w+2)]+[["#"]+list(input())+["#"]for i in range(h)]+[["#"]*(w+2)]
p=[[1,1]]
d=0
for i in range(1,h+1):
    for j in range(1,w+1):
        if s[i][j]==".":
            d+=1
s[1][1]="#"
k=0
while [h,w] not in p:
    k+=1
    g=[]
    for i in range(len(p)):
        x,y=p[i][0],p[i][1]
        if s[x-1][y]==".":
            s[x-1][y]="Q"
            g.append([x-1,y])
        if s[x+1][y]==".":
            s[x+1][y]="Q"
            g.append([x+1,y])
        if s[x][y+1]==".":
            s[x][y+1]="Q"
            g.append([x,y+1])
        if s[x][y-1]==".":
            s[x][y-1]="Q"
            g.append([x,y-1])
    else:
        p=g
        if len(p)==0:
            print(-1)
            break
else:
    print(d-k-1)
### BUGGY CODE ###

#!/usr/bin/env python3

from collections import deque

n = int(input())

connect_list = [[] for _ in range(n)]

ab = [list(map(int, input().split())) for i in range(n-1)]

for i in range(n-1):
    a, b = ab[i]
    connect_list[a-1].append(b-1)
    connect_list[b-1].append(a-1)


color_list = [[-1]*(n) for _ in range(n)]
check_list = [0]*n

color_max = 1

d = deque([0])
while(len(d) > 0):
    # print(d)
    index = d.pop()
    check_list[index] = 1

    index_list = connect_list[index]
    color_max = max(color_max, len(index_list))

    color_list_rest = set(range(1, len(index_list)+1))-set(color_list[index])

    for i in index_list:
        if color_list[index][i] == -1:
            num = color_list_rest.pop()
            color_list[index][i] = num
            color_list[i][index] = num

        if check_list[i] == 0:
            check_list[i] = 1
            d.append(i)


print(color_max)
for a, b in ab:
    print(color_list[a-1][b-1])


### FIXED CODE ###

#!/usr/bin/env python3

from collections import deque

n = int(input())

connect_list = [[] for _ in range(n)]

ab = [list(map(int, input().split())) for i in range(n-1)]

for i in range(n-1):
    a, b = ab[i]
    connect_list[a-1].append(b-1)
    connect_list[b-1].append(a-1)


color_list = {}
check_list = [0]*n

color_max = max(map(len, connect_list))

vertex = [0 for i in range(n)]
d = deque([0])

while(len(d) > 0):
    # print(d)
    index = d.pop()
    check_list[index] = 1

    index_list = connect_list[index]

    for i in index_list:
        if check_list[i] == 1:
            continue

        check_list[i] = 1
        d.append(i)
        num = vertex[index] % color_max+1
        color_list[(min(index, i), max(index, i))] = num
        vertex[index], vertex[i] = num, num


print(color_max)
for a, b in ab:
    print(color_list[(a-1, b-1)])
### BUGGY CODE ###

from collections import defaultdict

n = int(input())
a = list(map(int, input().split()))
b = list(map(int, input().split()))

if all(a[0] == a[i] for i in range(n)):
    print(0)
    exit()

pre = [1<<i for i in range(n)]
bitcnt = [0]*(1<<n)
bitcnt[1] = 1
for i in range(1<<(n-1)):
    bitcnt[2*i] = bitcnt[i]
    bitcnt[2*i+1] = bitcnt[i]+1

DP = [defaultdict(lambda : float("inf")) for i in range(n)]

for i in range(n):
    DP[i][1<<i] = 0

for i in range(n-1):
    nxt = [defaultdict(lambda : float("inf")) for i in range(n)]
    for j in range(n):
        last = a[j] if (i-j)%2 == 0 else b[j]
        for state, cost in DP[j].items():
            for to in range(n):
                if state>>to&1:
                    continue
                nlast = a[to] if (i+1-to)%2 == 0 else b[to]
                if last > nlast:
                    continue
                nstate = state + pre[to]
                ncost = cost
                ncost += bitcnt[state>>to]
                nxt[to][nstate] = min(nxt[to][nstate], ncost)
    DP = nxt
mask = (1<<n)-1
ans = float("inf")
for i in range(n):
    ans = min(ans, DP[i][mask])
if ans == float("inf"):
    print(-1)
else:
    print(ans)

### FIXED CODE ###

from collections import defaultdict

def main():

    n = int(input())
    a = list(map(int, input().split()))
    b = list(map(int, input().split()))

    if all(a[0] == a[i] for i in range(n)):
        print(0)
        exit()

    pre = [1<<i for i in range(n)]
    bitcnt = [0]*(1<<n)
    bitcnt[1] = 1
    for i in range(1<<(n-1)):
        bitcnt[2*i] = bitcnt[i]
        bitcnt[2*i+1] = bitcnt[i]+1

    DP = [defaultdict(lambda : float("inf")) for i in range(n)]

    for i in range(n):
        DP[i][1<<i] = 0
    s = defaultdict(lambda : float("inf"))
    for i in range(n-1):
        nxt = [defaultdict(lambda : float("inf")) for i in range(n)]
        for j in range(n):
            last = a[j] if (i-j)%2 == 0 else b[j]
            for state, cost in DP[j].items():
                for to in range(n):
                    if state>>to&1:
                        continue
                    nlast = a[to] if (i+1-to)%2 == 0 else b[to]
                    if last > nlast:
                        continue
                    nstate = state|pre[to]
                    ncost = cost
                    ncost += bitcnt[state>>to]
                    if s[(nstate, nlast)] <= ncost:
                        continue
                    s[(nstate, nlast)] = ncost
                    if nxt[to][nstate] > ncost:
                        nxt[to][nstate] = ncost
        DP = nxt
    mask = (1<<n)-1
    ans = float("inf")
    for i in range(n):
        ans = min(ans, DP[i][mask])
    if ans == float("inf"):
        print(-1)
    else:
        print(ans)

if __name__ == "__main__":
    main()
### BUGGY CODE ###

n = int(input())
seq = [x for x in input().split(' ')]

b = []

for i in range(n):
    if n % 2 == 0:
        if i % 2 == 0:
            b.append(seq[i])
        else:
            b.insert(0, seq[i])
    else:
        if i % 2 == 0:
            b.insert(0, seq[i])
        else:    
            b.append(seq[i])

print(' '.join(b))

### FIXED CODE ###

n = int(input())
seq = [x for x in input().split(' ')]

b = []

if n % 2 == 0:
    for j in range(n-1, -1, -2):
        b.append(seq[j])
    for i in range(0, n, 2):
        b.append(seq[i])

else:
    for j in range(n-1, -1, -2):
        b.append(seq[j])
    
    for i in range(1, n, 2):
        b.append(seq[i])

print(' '.join(b))
### BUGGY CODE ###

N=int(input())
P = list(map(int,input().split()))

#print(N)
#print(P)

SUCCESS = N
pre_max = P[0]
for i in range(N):
    j = i - 1
    if pre_max < P[i]:
        #print(i, j, pre_max)
        pre_max = P[j]
        SUCCESS -= 1
        continue

    while j >= 0:        
        if P[i] > P[j]:
            #print("Fail", i,j)
            SUCCESS -= 1
            break        
        j -= 1

print(SUCCESS)

### FIXED CODE ###

N=int(input())
P = list(map(int,input().split()))

#print(N)
#print(P)

SUCCESS = N
pre_max = P[0]
pre_min = P[0]
for i in range(N):
    j = i - 1

    if pre_min < P[i]:
        SUCCESS -= 1
        continue
    else:
        pre_min = P[i]
print(SUCCESS)
### BUGGY CODE ###

q=int(input())
l=[0]*q
r=[0]*q
for i in range(q):
    l[i],r[i]=map(int,input().split())

n=max(r)+1
sievebd=n//2-1
sieve=[True]*sievebd
limit=(int((n-1)**.5)-1)//2
for i in range(limit):
    if sieve[i]:
        for j in range(2*i**2+6*i+3,sievebd,2*i+3):
            sieve[j]=False
for i in range((sievebd-1)//2-1,-1,-1):
    if not sieve[i]:sieve[2*i+1]=False
if len(sieve)>2:
    for i in range(2,sievebd,2):
        sieve[i]=False
for i in range(q):
    print(sum(sieve[max(0,(l[i]-3)//2):max(0,(r[i]-3)//2+1)]))

### FIXED CODE ###

import sys
input = sys.stdin.readline

n=10**5
sievebd=n//2
sieve=[True]*sievebd
limit=int(n**.5)//2
sieve[0]=0
for i in range(limit):
    if sieve[i]:
        for j in range(2*i*(i+1),sievebd,2*i+1):
            sieve[j]=False
for i in range((sievebd-1)//2,0,-1):
    if not sieve[i]:sieve[2*i]=False
for i in range(3,sievebd,2):sieve[i]=False
for i in range(1,sievebd):sieve[i]+=sieve[i-1]
q=int(input())
l=[list(map(int,input().split())) for _ in [0]*q]
for i in range(q):
    print(sieve[(l[i][1]-1)//2]-sieve[max(0,(l[i][0]-1)//2-1)])
### BUGGY CODE ###

H, W = map(int, input().split())
sh, sw = map(int, input().split())
gh, gw = map(int, input().split())

sh += 1
sw += 1
gh += 1
gw += 1

S = [0]*(H+4)
S[0] = '*'*(W+4)
S[1] = '*'*(W+4)
S[-2] = '*'*(W+4)
S[-1] = '*'*(W+4)
for h in range(2,H+2):
  S[h] = '**' + input() + '**'

visited = [[float('inf')]*(W+4) for _ in range(H+4)]
dh1 = [0,1,0,-1]
dw1 = [1,0,-1,0]
dh2 = [2,2,2,2,2,1,1,1,1,0,0,-1,-1,-1,-1,-2,-2,-2,-2,-2]
dw2 = [-2,-1,0,1,2,-2,-1,1,2,-2,2,-2,-1,1,2,-2,-1,0,1,2]

from heapq import heappush, heappop, heappushpop, heapify, heapreplace, merge
d = []
heapify(d)
heappush(d,(0,sh,sw))
ans = float('inf')
while len(d)>0:
  cnt,h,w = heappop(d)
  if cnt>=ans:
    break
  if visited[h][w]<=cnt:
    continue
  visited[h][w] = cnt
  for i in range(4):
    h1 = h+dh1[i]
    w1 = w+dw1[i]
    if (h1,w1)==(gh,gw):
      ans = min(ans,cnt)
    if S[h1][w1]=='.':
      if visited[h1][w1]>cnt:
        heappush(d,(cnt,h1,w1))
  for i in range(20):
    h2 = h+dh2[i]
    w2 = w+dw2[i]
    if (h2,w2)==(gh,gw):
      ans = min(ans,cnt+1)
    if S[h2][w2]=='.':
      if visited[h2][w2]>cnt+1:
        heappush(d,(cnt+1,h2,w2))
ans = ans if ans<float('inf') else -1
print(ans)


### FIXED CODE ###

H, W = map(int, input().split())
sh, sw = map(int, input().split())
gh, gw = map(int, input().split())

sh += 1
sw += 1
gh += 1
gw += 1
s = sh*(W+4)+sw
g = gh*(W+4)+gw
S = [0]*(H+4)
S[0] = '*'*(W+4)
S[1] = '*'*(W+4)
S[-2] = '*'*(W+4)
S[-1] = '*'*(W+4)
for h in range(2,H+2):
  S[h] = '**' + input() + '**'

visited = [10**7]*((W+4)*(H+4))
dh1 = [0,1,0,-1]
dw1 = [1,0,-1,0]
dh2 = [2,2,2,2,2,1,1,1,1,0,0,-1,-1,-1,-1,-2,-2,-2,-2,-2]
dw2 = [-2,-1,0,1,2,-2,-1,1,2,-2,2,-2,-1,1,2,-2,-1,0,1,2]

from collections import deque

d = deque()
visited[s] = 0
d.append(s)
ans = 10**8
while len(d)>0:
  a = d.popleft()
  h,w = divmod(a,W+4)
  cnt = visited[a]
  if ans<=cnt:
    continue
  for i in range(4):
    h1 = h+dh1[i]
    w1 = w+dw1[i]
    a1 = h1*(W+4)+w1
    if (h1,w1)==(gh,gw):
      ans = min(ans,cnt)
    if S[h1][w1]=='.':
      if visited[a1]>cnt:
        visited[a1]=cnt
        d.appendleft(a1)
  for i in range(20):
    h2 = h+dh2[i]
    w2 = w+dw2[i]
    a2 = h2*(W+4)+w2
    if (h2,w2)==(gh,gw):
      ans = min(ans,cnt+1)
    if S[h2][w2]=='.':
      if visited[a2]>cnt+1:
        visited[a2]=cnt+1
        d.append(a2)
if ans==10**8:
  ans = -1
print(ans)
### BUGGY CODE ###

o_list=[]
while True:
	try:
		n=int(input())
		I_list=[i for i in range(2,n+1)]
		prime_list=[]
		for i in I_list:
			k=I_list[0]
			prime_list.append(k)
			for j in I_list:
				if j%k==0:
					I_list.remove(j)

		K=set(I_list) | set(prime_list)
		K=list(K)
		K=sorted(K)
		o_list.append(len(K))
	except:
		for i in o_list:
			print(i)
		break

### FIXED CODE ###

from math import sqrt
I_list=[]
prime_list=[]
while True:
	try:
		I_list.append(int(input()))
	except:
		break
I_max=max(I_list)
search_set={x for x in range(2,I_max+1)}


p=-1
while p<=sqrt(I_max):
	p=min(search_set)
	prime_list.append(p)
	search_set={x for x in search_set if x%p !=0 }

search_list=sorted(list(search_set))
prime_list+=search_list

#print(prime_list)


for i in I_list:
	lower_set={j for j in prime_list if j<=i } 
#	print(lower_set)
	print(len(lower_set))
### BUGGY CODE ###

import sys
import math
input= sys.stdin.readline
N, M = map(int,input().split())
 
A= list(map(int,input().split()))
 
A.sort(reverse=True)
cnt = 1
A[0]=A[0]//2
 
if N==1:
    while A[0]>0 and cnt<M:
        cnt+=1
        A[0]=A[0]//2
else:
    while cnt<M:
        c=min(M-cnt,int(math.log2(A[0]/A[1])+1))
        cnt+=c
        A[0]=A[0]//(2**c)
          
        b=A[0]
        A.sort(reverse=True)
    
print(sum(A))

### FIXED CODE ###

import heapq

N, M = map(int, input().split())

a = [-int(x) for x in input().split()]

heapq.heapify(a)

num = 0
hq = 1

while num < M and hq != 0:
    hq = -heapq.heappop(a)
    hq2 = hq // 2
    heapq.heappush(a, -hq2)
    num += 1

print(-sum(a))
### BUGGY CODE ###

import sys
n = int(input())
ans = 10**12

for k in range(1,n+1//2):
    if n%k == 0 :
        m = n//k + k - 2
        if ans > m:
            ans = m
        else:
            print(ans)
            sys.exit()
print(ans)

### FIXED CODE ###

n = int(input())
ans = 10**12

for k in range(1,int((n)**0.5)+2):
    if n%k == 0 :
        m = n//k + k - 2
        if ans > m:
            ans = m
print(ans)
### BUGGY CODE ###

N, M = map(int, input().split())
G = [[] for _ in range(3 * N)]
for _ in range(M):
    u, v = map(int, input().split())
    u -= 1
    v -= 1
    G[3*u+0].append(3*v+1)
    G[3*u+1].append(3*v+2)
    G[3*u+2].append(3*v+0)
s, t = map(int, input().split())
S = 3 * (s-1)
T = 3 * (t-1)


class Node:
    def __init__(self, v, l):
        self.v = v
        self.l = l

Frontier = [Node(S, 0)]
Explored = []
while Frontier:
    node = Frontier.pop(0)
    v = node.v
    l = node.l
    Explored.append(v)
    next = G[v]
    if T in next:
        print((l + 1) // 3)
        exit();
    for i in next:
        if i not in Explored:
            Frontier.append(Node(i,l+1))

print(-1)

### FIXED CODE ###

N, M = map(int, input().split())
G = [[] for _ in range(3 * N)]
L = [-3 for _ in range(3 * N)]
for _ in range(M):
    u, v = map(int, input().split())
    u -= 1
    v -= 1
    G[3*u+0].append(3*v+1)
    G[3*u+1].append(3*v+2)
    G[3*u+2].append(3*v+0)
s, t = map(int, input().split())
S = 3 * (s-1)
T = 3 * (t-1)

L[S] = 0
Frontier = [S]
while Frontier:
    v = Frontier.pop(0)
    for i in G[v]:
        if L[i] < 0:
            Frontier.append(i)
            L[i] = L[v] + 1

print(L[T]//3)
### BUGGY CODE ###

N = int(input())
A = list(map(int, input().split()))
B = list(map(int, input().split()))
C = list(map(int, input().split()))
A.sort()
B.sort()
C.sort()

def binsearch(threshold, lst):
    left, right = -1, len(lst)
    while right - left > 1:
        mid = (left + right) // 2
        if lst[mid] > threshold:
            right = mid
        else:
            left = mid
    return right

ans = 0
for a in A:
    b_min_index = binsearch(a, B)
    for i in range(b_min_index, N):
        c_min_index = binsearch(B[i], C)
        ans += N - c_min_index
        #print(a, B[b_min_index], C[c_min_index])
print(ans)


### FIXED CODE ###

N = int(input())
A = list(map(int, input().split()))
B = list(map(int, input().split()))
C = list(map(int, input().split()))
A.sort()
B.sort()
C.sort()

def binsearch(threshold, lst):
    left, right = -1, len(lst)
    while right - left > 1:
        mid = (left + right) // 2
        if lst[mid] > threshold:
            right = mid
        else:
            left = mid
    return right

ans = 0

BtoC = [None] * N
for i in range(0, N):
    BtoC[i] = N - binsearch(B[i], C)
#print(BtoC)

cumulative=[0]
for i in range(N):
    cumulative.append(cumulative[i] + BtoC[N-i-1])
#print(cumulative)
cumulative.reverse()
#print(cumulative)

for j in range(0, N):
    temp = binsearch(A[j], B)
    ans += cumulative[temp]

print(ans)
### BUGGY CODE ###

N, K = (int(x) for x in input().split(' '))
H    = [int(x) for x in input().split(' ')]
#ソート処理
list.sort(H, reverse=True)
#K回最大値をHから消す
while N > 0 and K > 0:
  del H[0]
  N -= 1
  K -= 1
#総和を出力
print(sum(H))

### FIXED CODE ###

N, K = (int(x) for x in input().split(' '))
H    = [int(x) for x in input().split(' ')]
#ソート処理
list.sort(H, reverse=True)
#K回最大値をHから消す
if N >= K:
  del H[0:K]
else:
  H.clear()
#総和を出力
print(sum(H))
### BUGGY CODE ###

import itertools
import math
import fractions
import functools
import copy
from collections import deque
from functools import reduce
from decimal import Decimal


def main():
    n = int(input())

    l = []
    for i in range(1, math.floor(math.sqrt(n))):
        l.append(i)

    l_list = list(itertools.combinations_with_replacement(l, 3))

    ans_list = []
    for j in range(len(l_list)):
        x = l_list[j][0]
        y = l_list[j][1]
        z = l_list[j][2]
        ans = x**2 + y**2 + z**2 + x*y + y*z + z*x
        ans_list.append((ans, [x, y, z]))

    for i in range(1, n+1):
        count = 0
        for j in range(len(ans_list)):
            if ans_list[j][0] == i and ans_list[j][1][0] == ans_list[j][1][1]and ans_list[j][1][2] == ans_list[j][1][1]:
                count += 1
            elif ans_list[j][0] == i:
                count += 3

        print(count)


if __name__ == '__main__':
    main()


### FIXED CODE ###

import itertools
import math
import fractions
import functools
import copy
from collections import deque
from functools import reduce
from decimal import Decimal


def main():
    n = int(input())
    l = [0]*(n+1)
    for x in range(1,101):
        for y in range(1,101):
            for z in range(1,101):
                temp = x**2 + y**2 + z**2 + x*y + y*z + z*x
                if temp <= n:
                    l[temp] += 1

    for i in range(1, n+1):
        print(l[i])


if __name__ == '__main__':
    main()
### BUGGY CODE ###

n=int(input())

a=[int(input()) for _ in range(n)]
#a(n+1)!=0の時、a(n+1)=a(n)+1である

cnt=0

if a[0]!=0:
    print(-1)
    exit()

b=[0]*n
#print(a)
for ii in range(1,n):
    i=n-ii
    if a[i]==b[i]:
        continue
    elif a[i]<b[i] or a[i]>i:
        print(-1)
        exit()
    else:
        for k in range(a[i]+1):
            b[i-k]=a[i]-k
        cnt+=a[i]

    #print(b)

print(cnt)

    
"""
t: 0 1 1 0 1 2 2 1 2
s: 0 0 0 0 0 0 0 0 0
1: 0 0 1 0 0 0 0 0 0
2: 0 1 1 0 0 0 0 0 0
3: 0 1 1 0 0 0 0 1 0
4: 0 1 1 0 0 0 0 1 2
5: 0 1 1 0 0 1 0 1 2

"""





### FIXED CODE ###

n=int(input())

a=[int(input()) for _ in range(n)]
#a(n+1)!=0の時、a(n+1)=a(n)+1である

cnt=0

if a[0]!=0:
    print(-1)
    exit()
#print(" ".join(list(map(str,a))))
for ii in range(1,n):
    i=n-ii
    if a[i]==0:
        continue
    elif a[i]<=a[i-1]:
        cnt+=a[i]
    elif a[i]==a[i-1]+1:
        cnt+=1
    elif a[i]>a[i-1]+1 or  a[i]>i:
        print(-1)
        exit()
    #print(b)
    #print(" "*(i+1),"^",cnt)

print(cnt)

    
"""
t: 0 1 1 0 1 2 2 1 2
s: 0 0 0 0 0 0 0 0 0
1: 0 0 1 0 0 0 0 0 0
2: 0 1 1 0 0 0 0 0 0
3: 0 1 1 0 0 0 0 1 0
4: 0 1 1 0 0 0 0 1 2
5: 0 1 1 0 0 1 0 1 2

"""
### BUGGY CODE ###

N = int(input())

MAXNUM = 10 ** 6 + 10
a = [i for i in range(1, MAXNUM)]

def calc(i):
    l, r = 0, MAXNUM
    while r-l > 1:
        mid = (l+r)//2
        if mid * i < N:
            l = mid
        else:
            r = mid
    return l

cnt = 0
for i in range(1, MAXNUM):
    cnt += calc(i)

print(cnt)


### FIXED CODE ###

N = int(input())

MAXNUM = 10 ** 6 + 10
a = [i for i in range(1, MAXNUM)]

def calc(i):
    l, r = 0, MAXNUM
    while r-l > 1:
        mid = (l+r)//2
        if mid * i < N:
            l = mid
        else:
            r = mid
    return l

cnt = 0
for i in range(1, MAXNUM):
    cnt += calc(i)

print(cnt)
### BUGGY CODE ###

from sys import stdin
from collections import deque
s=list(str(input()))
s=deque(s)
q=int(stdin.readline().rstrip())
cnt=0
for i in range(q):
    que=list(input().split())
    if len(que)==1:
        cnt+=1
    else:
        if cnt%2!=0:
            s.reverse()
        if int(que[1])==1:
            s=deque(s)
            s.appendleft(que[2])
            cnt=0
        elif int(que[1])==2:
            s=deque(s)
            s.append(que[2])
            cnt=0
if cnt%2!=0:
    s.reverse()
print(''.join(s)) 

### FIXED CODE ###

from collections import deque
s=list(str(input()))
s=deque(s)
q=int(input())
cnt=0
for i in range(q):
    que=list(input().split())
    if len(que)==1:
        cnt+=1
    if len(que)!=1 and cnt%2==0:
        if int(que[1])==1:
            s.appendleft(que[2])
        elif int(que[1])==2:
            s.append(que[2])
    if len(que)!=1 and cnt%2!=0:
        if int(que[1])==1:
            s.append(que[2])
        elif int(que[1])==2:
            s.appendleft(que[2])
if cnt%2!=0:
    s.reverse()
print(''.join(s))
### BUGGY CODE ###

import sys
from collections import deque as dq
input = sys.stdin.readline
H, W, K = map(int, input().split())
x, y, u, v = map(int, input().split())
x -= 1
y -= 1
u -= 1
v -= 1
a = [list(input())[: -1] for _ in range(H)]
Q = dq([x * W + y])
inf = H * W + 1
dp = [inf] * (H * W)
dp[x * W + y] = 0
while len(Q):
  t = Q.popleft()
  p = t // W
  q = t % W
  for i in range(1, K + 1):
    pp = p + i
    if pp in range(H):
      if a[pp][q] == "@": break
      if dp[pp * W + q] <= dp[t]: continue
      dp[pp * W + q] = dp[t] + 1
      Q.append(pp * W + q)
  for i in range(1, K + 1):
    pp = p - i
    if pp in range(H):
      if a[pp][q] == "@": break
      if dp[pp * W + q] <= dp[t]: continue
      dp[pp * W + q] = dp[t] + 1
      Q.append(pp * W + q)

  for i in range(1, K + 1):
    qq = q + i
    if qq in range(W):
      if a[p][qq] == "@": break
      if dp[p * W + qq] <= dp[t]: continue
      dp[p * W + qq] = dp[t] + 1
      Q.append(p * W + qq)

  for i in range(1, K + 1):
    qq = q - i
    if qq in range(W):
      if a[p][qq] == "@": break
      if dp[p * W + qq] <= dp[t]: continue
      dp[p * W + qq] = dp[t] + 1
      Q.append(p * W + qq)
if dp[u * W + v] != inf: print(dp[u * W + v])
else: print(-1)

### FIXED CODE ###

import sys
from collections import deque as dq
input = sys.stdin.readline
H, W, K = map(int, input().split())
x, y, u, v = map(int, input().split())
x -= 1
y -= 1
u -= 1
v -= 1
a = [list(input())[: -1] for _ in range(H)]
Q = dq([(0, x * W + y)])
inf = H * W + 1
dp = [inf] * (H * W)
dp[x * W + y] = 0
while len(Q):
  cost, t = Q.popleft()
  dp[t] = cost
  p = t // W
  q = t % W
  if (p, q) == (u, v):
    print(cost)
    exit(0)
  for i in range(1, K + 1):
    pp = p + i
    if pp in range(H):
      if a[pp][q] == "@": break
      if dp[pp * W + q] <= dp[t]: break
      if dp[pp * W + q] != inf: continue
      dp[pp * W + q] = dp[t] + 1
      Q.append((dp[t] + 1, pp * W + q))
  for i in range(1, K + 1):
    pp = p - i
    if pp in range(H):
      if a[pp][q] == "@": break
      if dp[pp * W + q] <= dp[t]: break
      if dp[pp * W + q] != inf: continue
      dp[pp * W + q] = dp[t] + 1
      Q.append((dp[t] + 1, pp * W + q))

  for i in range(1, K + 1):
    qq = q + i
    if qq in range(W):
      if a[p][qq] == "@": break
      if dp[p * W + qq] <= dp[t]: break
      if dp[p * W + qq] != inf: continue
      dp[p * W + qq] = dp[t] + 1
      Q.append((dp[t] + 1, p * W + qq))

  for i in range(1, K + 1):
    qq = q - i
    if qq in range(W):
      if a[p][qq] == "@": break
      if dp[p * W + qq] <= dp[t]: break
      if dp[p * W + qq] != inf: continue
      dp[p * W + qq] = dp[t] + 1
      Q.append((dp[t] + 1, p * W + qq))
print(-1)