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

import math
from itertools import accumulate


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

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

accum_A = [0] + A
accum_A = list(accumulate(accum_A))

ans = 0

for i in range(n):
    for j in range(i+1,n+1):
#         print('l:{}, r:{}, sum:{}'.format(i,j,(accum_A[j]-accum_A[i])))
        if (accum_A[j]-accum_A[i]) % m == 0:
            ans += 1

print(ans)


### FIXED CODE ###


import math
from itertools import accumulate

def combinations_count(n, r):
    return math.factorial(n) // (math.factorial(n - r) * math.factorial(r))


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

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


accum_A = [0] + A
accum_A = list(accumulate(accum_A))

mod_dic = {}

for i in accum_A:
    mod = i%m
    
    if mod in mod_dic.keys():
        mod_dic[mod] += 1
    else:
        mod_dic[mod] = 1

ans = 0
    
for i in mod_dic.values():
    if i >= 2:
        ans += combinations_count(i,2)
    
print(ans)
### BUGGY CODE ###

#!/usr/bin/env python3
import sys
sys.setrecursionlimit(10**7)
import bisect
import heapq
import itertools
import math
from collections import Counter, defaultdict, deque
from copy import deepcopy
from decimal import Decimal
from math import gcd
from operator import add, itemgetter, mul, xor
def cmb(n,r,mod):
  bunshi=1
  bunbo=1
  for i in range(r):
    bunbo = bunbo*(i+1)%mod
    bunshi = bunshi*(n-i)%mod
  return (bunshi*pow(bunbo,mod-2,mod))%mod
mod = 10**9+7
def I(): return int(input())
def LI(): return list(map(int,input().split()))
def MI(): return map(int,input().split())
def LLI(n): return [list(map(int, input().split())) for _ in range(n)]

def isOK(index,key,li):
    if li[index] >= key:
        #不等号にイコールを入れないとokはliの中でkey以下の数字がいくつあるかを表し、
        #ここの不等号にイコールを入れると
        #okはliの中でkey未満の数字がいくつあるかを表すようになる
        return True
    else:
        return False
def binary_search(key,li):
    ng = -1
    ok = len(li)
    while abs(ok - ng) > 1:
        mid = ok + ng //2
        if isOK(mid,key,li):
            ok = mid
        else:
            ng = mid
    return ok
    #liはsortしておくことに注意


n = I()
a_li = sorted(LI())
b_li = sorted(LI())
c_li= sorted(LI())
ans = 0
for i in range(n):
    C = c_li[i]
    k = binary_search(C,b_li)
    for j in range(k):
        B = b_li[j]
        l = binary_search(B,a_li)
        ans += l
print(ans)


### FIXED CODE ###

import bisect

def I(): return int(input())
def LI(): return list(map(int,input().split()))
def MI(): return map(int,input().split())
def LLI(n): return [list(map(int, input().split())) for _ in range(n)]

#bisect.bisect_left(list,key)はlistのなかでkey未満の数字がいくつあるかを返す
#bisect.bisect_right(list, key)はlistのなかでkey以下の数字がいくつあるかを返す
#これを応用することで
#len(list) - bisect.bisect_left(list,key)はlistのなかでkey以上の数字がいくつあるかを返す
#len(list) - bisect.bisect_right(list,key)はlistのなかでkeyより大きい数字がいくつあるかを返す
#これらを使うときはあらかじめlistをソートしておくこと！
n = I()
a_li = sorted(LI())
b_li = sorted(LI())
c_li= sorted(LI())
ans = 0
for i in range(n):
  B = b_li[i]
  k = n - bisect.bisect_right(c_li,B)
  l = bisect.bisect_left(a_li,B)
  ans += k*l
print(ans)
### BUGGY CODE ###

from math import factorial
import fractions as fr

from sys import stdin


def main():
    k = int(stdin.readline())

    ans = 0

    for a in range(1, k + 1):
        for b in range(a, k + 1):
            d = fr.gcd(a, b)
            for c in range(b, k + 1):
                e = fr.gcd(d, c)
                ans += e * factorial(3)//factorial(3 - len(set([a, b, c])) + 1)

    print(ans)


if __name__ == "__main__":
    main()


### FIXED CODE ###

from math import factorial

from sys import stdin


def gcd(x, y):
    if x % y == 0:
        return y
    return gcd(y, x % y)


def main():
    k = int(stdin.readline())

    ans = 0

    for a in range(1, k + 1):
        for b in range(a, k + 1):
            d = gcd(a, b)
            for c in range(b, k + 1):
                e = gcd(d, c)
                ans += e * factorial(3) // factorial(3 - len(set([a, b, c])) + 1)

    print(ans)


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

from collections import deque
H, W = map(int, input().split())
Ch, Cw = map(int, input().split())
Dh, Dw = map(int, input().split())
Ch, Cw, Dh, Dw = Ch - 1, Cw - 1, Dh - 1, Dw - 1
maze = [list(input()) for i in range(H)]
#print(maze)
  
ans = [[-1] * W for i in range(H)]  
ans[Ch][Cw] = 0
q = deque([[0, Ch, Cw]])  
one = [[0, 1], [0, -1], [1, 0], [-1, 0]]
two = [[2, 2], [2, 1], [2, 0], [2, -1], [2, -2], [1, 2], [1, 1], [1, -1], [1, -2], [0, -2], [0, 2], [-1, 2], [-1, -1], [-1, 1], [-1, 2], [-2, 2], [-2, 1], [-2, 0], [-2, -1], [-2, -2]] 
while q:
  cnt, h, w = q.popleft()
  if ans[h][w] < cnt:
    continue
  for i, j in one:
    if (0 <= h + i < H) and (0 <= w + j < W) and (maze[h + i][w + j] != "#"):
        if ans[h + i][w + j] == -1 or ans[h + i][w + j] > cnt:
          ans[h + i][w + j] = cnt
          q.appendleft([cnt, h + i, w + j])
  for i, j in two:  
    if (0 <= h + i < H) and (0 <= w + j < W) and (maze[h + i][w + j] != "#"):
        if ans[h + i][w + j] == -1 or ans[h + i][w + j] > cnt + 1:
          ans[h + i][w + j] = cnt + 1
          q.appendleft([cnt + 1, h + i, w + j])
              
print(ans[Dh][Dw])              
          
              
          
          
    
    
    

  


### FIXED CODE ###


H, W = map(int, input().split())
Ch, Cw = map(int, input().split())
Dh, Dw = map(int, input().split())
Ch, Cw, Dh, Dw = Ch - 1, Cw - 1, Dh - 1, Dw - 1
maze = [list(input()) for i in range(H)]
#print(maze)
  
ans = [[-1] * W for i in range(H)]  
ans[Ch][Cw] = 0
from collections import deque
q = deque([[0, Ch, Cw]])  
one = [[0, 1], [0, -1], [1, 0], [-1, 0]]
two = [[2, 2], [2, 1], [2, 0], [2, -1], [2, -2], [1, 2], [1, 1], [1, -1], [1, -2], [0, 2], [0, -2], [-1, 2], [-1, 1], [-1, -1], [-1, -2], [-2, 2], [-2, 1], [-2, 0], [-2, -1], [-2, -2]] 
while q:
  cnt, h, w = q.popleft()
  if ans[h][w] < cnt:
    continue
  for i, j in one:
    if (0 <= h + i < H) and (0 <= w + j < W) and (maze[h + i][w + j] != "#"):
        if ans[h + i][w + j] == -1 or ans[h + i][w + j] > cnt:
          ans[h + i][w + j] = cnt
          q.appendleft([cnt, h + i, w + j])
  for i, j in two:  
    if (0 <= h + i < H) and (0 <= w + j < W) and (maze[h + i][w + j] != "#"):
        if ans[h + i][w + j] == -1 or ans[h + i][w + j] > cnt + 1:
          ans[h + i][w + j] = cnt + 1
          q.append([cnt + 1, h + i, w + j])
              
print(ans[Dh][Dw])
### BUGGY CODE ###

def main():
    import sys
    input = sys.stdin.buffer.readline
    from math import gcd
    N = int(input())
    A = list(map(int, input().split()))
    A.sort()
    S = 1
    d = dict()
    for x in A:
        S *= x
    flag = True
    for x in A:
        S //= x
        if gcd(S, x) == 1:
            continue
        else:
            flag = False
            break
    if flag:
        print("pairwise coprime")
    else:
        g = A[0]
        for x in A[1:]:
            g = gcd(x, g)
        if g == 1:
            print("setwise coprime")

        else:
            print("not coprime")


main()


### FIXED CODE ###

def main():
    import sys
    input = sys.stdin.buffer.readline
    from math import gcd
    N = int(input())
    A = list(map(int, input().split()))
    g = A[0]
    M = max(A)
    X = [i for i in range(M+1)]
    S = [True for i in range(M+1)]
    S[0] = False
    S[1] = False

    for i in range(1, M+1):
        if S[i]:
            for j in range(i, M+1, i):
                if S[j]:
                    S[j] = False
                    X[j] = i
    flag = True
    s = set()
    ls = 0
    for x in A:
        tmp = set()
        while(X[x] != 1):
            tmp.add(X[x])
            x //= X[x]
        l = len(tmp)
        s |= tmp
        if len(s) == ls + l:
            ls += l
            continue
        else:
            flag = False
            break

    if flag:
        print("pairwise coprime")
    else:
        for x in A[1:]:
            g = gcd(g, x)
        if g == 1:
            print("setwise coprime")

        else:
            print("not coprime")


main()
### BUGGY CODE ###

n, m = map(int, input().split())
comb = 0

while m >= 2 and n >= 1:
    comb += 1
    m -= 2
    n -= 1

comb += m // 4

print(comb)


### FIXED CODE ###

n, m = map(int, input().split())
comb = 0

if 2 * n >= m:
    comb += m // 2
    m -= comb * 2
else:
    comb += n
    m -= 2 * n

comb += m // 4

print(comb)
### BUGGY CODE ###

N = int(input())
L = [input() for i in range(N)]
l = list(set(L))
l.sort()
c = [L.count(j) for j in l]
C = max(c)
[print(l[k]) for k in range(len(l)) if c[k] == C]

### FIXED CODE ###

import collections
N = int(input())
l = [input() for i in range(N)]
L = collections.Counter(l)
a = L.most_common()
M = a[0][1]
A = [j[0] for j in a if j[1] == M]
[print(k) for k in sorted(A)]
### BUGGY CODE ###

n=int(input())
a=list(map(int,input().split()))
import operator
from functools import reduce
def mul(*numbers):
    return reduce(operator.mul, numbers)
if mul(*a)<=10**18:
  print(mul(*a))
else:
  print(-1)

### FIXED CODE ###

n=int(input())
a=sorted(list(map(int,input().split())))
if a[0]==0:
    print(0)
else:
    ans=1
    for i in a:
        ans=ans*i
        if ans>10**18:
            print(-1)
            break
    else:
        if ans>10**18:
            print(-1)
        else:
            print(ans)
### BUGGY CODE ###

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

num_li = [0]*n
ans = 0
num = 0

for i in range(n):
    num_li[i] = ((p[i]*(p[i]+1))/2)/p[i]

ans = sum(num_li[:k])

for j in range(n-k+1):
    num += num_li[j]
    for m in range(1,k):
        num += num_li[j+m]
    ans = max(num, ans)
    num = 0

print(ans)

### FIXED CODE ###

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

num_li = [0]*n

for i in range(n):
    num_li[i] = (p[i]+1)/2

num = sum(num_li[:k])
ans = num

for j in range(n-k):
    num = num-num_li[j]+num_li[j+k]
    ans = max(num, ans)

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

# soundhound2018_summer_qual_d
import networkx as nx
n, m, s, t = map(int, input().split())


Gy = nx.Graph()   # Yen
Gy.add_nodes_from(range(1, n+1))

Gs = nx.Graph()   # Snuuk
Gs.add_nodes_from(range(1, n+1))


for _ in range(m):
    u, v, a, b = map(int, input().split())
    Gy.add_edge(u, v, weight=a)
    Gs.add_edge(u, v, weight=b)

shortest_length_from_s = nx.shortest_path_length(Gy, source=s, weight='weight')
shortest_length_to_t = nx.shortest_path_length(Gs, target=t, weight='weight')


dist = []
for i in range(n):
    dist.append(shortest_length_from_s[i+1]+shortest_length_to_t[i+1])


ans = []
B = 10**15
for i in range(n):
    B = min(B, dist[n-1-i])
    ans.append(B)
ans = ans[::-1]

for i in range(n):
    print(10**15-ans[i])


### FIXED CODE ###

import numpy as np
from heapq import heappush, heappop

n, m, s, t = map(int, input().split())
G = [[] for _ in range(n+1)]
for _ in range(m):
    u, v, a, b = map(int, input().split())
    G[u].append((v, a, b))
    G[v].append((u, a, b))


def dijkstra(start, mode):
    INF = 10 ** 15
    dist = [INF] * (n+1)
    dist[start] = 0
    q = [(0, start)]
    while q:
        d, v = heappop(q)
        if dist[v] < d:
            continue
        for w, *a in G[v]:
            d1 = d + a[mode]
            if dist[w] > d1:
                dist[w] = d1
                heappush(q, (d1, w))
    return dist


d1 = np.array(dijkstra(s, 0))
d2 = np.array(dijkstra(t, 1))

# print(d1)


d = []
for i in range(n+1):
    d.append(d1[i]+d2[i])


ans = []
B = 10**15
for i in range(n):
    B = min(B, d[n-i])
    ans.append(B)
ans = ans[::-1]

for i in range(n):
    print(10**15-ans[i])
### BUGGY CODE ###

#https://atcoder.jp/contests/abc152/tasks/abc152_c
# -*- coding: utf-8 -*-
N = int(input())
P = input().split()
T = []
L =[0]*(N-1)
L.insert(0,1)
T.insert(0,int(P[0]))
P[0] = int(P[0])
for i in  range(1,len(P)):
  P[i] = int(P[i])
  if P[i]<=P[i-1]:
    if min(T)>=P[i]:
      L[i] = 1
    T.append(P[i])
print(L.count(1))

### FIXED CODE ###

#https://atcoder.jp/contests/abc152/tasks/abc152_c
# -*- coding: utf-8 -*-
N = int(input())
P = input().split()
T = []
L =0
T.insert(0,int(P[0]))
P[0] = int(P[0])
for i in  range(1,len(P)):
  P[i] = int(P[i])
  if T[-1]>=P[i]:
    L =+ 1
    if T[-1]>P[i]:
      T.append(P[i])
print(len(T))
### BUGGY CODE ###

n, k = map(int, input().split())
a = list(map(int, input().split()))
a.sort()
a_plus = [x for x in a if x >= 0]
a_minus = [x for x in a if x < 0]

def count_no_more_than(l):
    cnt = 0
    for x in a_plus:
        y_p = n
        while y_p-1 >= 0 and a[y_p-1] * x > l:
            y_p -= 1
        cnt += y_p

    for x in a_minus:
        y_p = -1
        while y_p+1 < n and a[y_p+1] * x > l:
            y_p += 1
        cnt += n-1 - y_p

    for x in a:
        if x * x <= l:
            cnt -= 1
        
    cnt //= 2
    return cnt

bottom = -(10**18)-1 # <k
top = 10**18 + 1     # >=k

while top - bottom > 1:
    mid = (top + bottom) // 2
    if count_no_more_than(mid) < k:
        bottom = mid
    else:
        top = mid

print(top)

### FIXED CODE ###

n, k = map(int, input().split())
a = list(map(int, input().split()))
minus = [-x for x in a if x < 0]
plus = [x for x in a if x >= 0]

minus.sort()
plus.sort()

def cnt(x):
    ans = 0
    if x < 0:
        x = -x
        r = 0
        for num in minus[::-1]:
            while r < len(plus) and plus[r] * num < x:
                r += 1
            ans += len(plus) -  r
        return ans

    r = 0
    for num in minus[::-1]:
        if num * num <= x: ans -= 1
        while r < len(minus) and minus[r] * num <= x:
            r += 1
        ans += r
    r = 0
    for num in plus[::-1]:
        if num * num <= x: ans -= 1
        while r < len(plus) and plus[r] * num <= x:
            r += 1
        ans += r
    ans //= 2
    ans += len(minus) * len(plus)    
    return ans

bottom = 0
top = 2*(10**18) + 2


while top - bottom > 1:
    mid = (top + bottom) // 2
    if cnt(mid - 10**18-1) < k:
        bottom = mid
    else:
        top = mid

print(int(top - 10**18-1))
### BUGGY CODE ###

N,K=map(int, input().split())
p = list(map(int, input().split()))

s=0

for i in range(N-K+1):
  s_=0
  s_=sum(p[i:K+i])
  if s_>s:
    s=s_
    
print((s+1*K)/2)

### FIXED CODE ###

N,K=map(int, input().split())
p = list(map(int, input().split()))

s=sum(p[0:K])
d=0
e=0
for i in range(N-K):
  d+=p[i+K]-p[i]
  if d>e:
    e=d
s+=e
print((s+1*K)/2)
### BUGGY CODE ###

import numpy as np
 
K=int(input())
 
S=0
for a in range(1,K+1):
    for b in range(1,K+1):
        calc=np.gcd(a,b)
        for c in range(1,K+1):
                S+=np.gcd(calc,c)
 
print(S)

### FIXED CODE ###

from math import gcd
 
K=int(input())
 
S=0
for a in range(1,K+1):
    for b in range(1,K+1):
        calc=gcd(a,b)
        for c in range(1,K+1):
                S+=gcd(calc,c)
 
print(S)
### BUGGY CODE ###

#!/usr/bin/env python3
import sys, math, itertools, collections, bisect
input = lambda: sys.stdin.buffer.readline().rstrip().decode('utf-8')
inf = float('inf') ;mod = 10**9+7
mans = inf ;ans = 0 ;count = 0 ;pro = 1

n = int(input())
A = [list(map(int,input().split())) for i in range(n)]
dp = [[0]*(1<<n) for i in range(n+1)]
dp[0][0] = 1
for i in range(n):
  for bit in range(1<<n):
    for k in range(n):
      if not (bit & 1<<k)  and A[i][k]:
        dp[i+1][bit|1<<k] += dp[i][bit]
        dp[i+1][bit|1<<k] %= mod
print(dp[n][(1<<n)-1])
# print(*dp,sep="\n")

### FIXED CODE ###

#!/usr/bin/env python3
import sys, math, itertools, collections, bisect
input = lambda: sys.stdin.buffer.readline().rstrip().decode('utf-8')
inf = float('inf') ;mod = 10**9+7
mans = inf ;ans = 0 ;count = 0 ;pro = 1

n = int(input())
A = [list(map(int,input().split())) for i in range(n)]
dp = [[0]*(1<<n) for i in range(n+1)]
dp[0][0] = 1
for i in range(n):
  for bit in range(1<<n):
    if not dp[i][bit]: continue
    for k in range(n):
      if not (bit & 1<<k)  and A[i][k]:
        dp[i+1][bit|1<<k] += dp[i][bit]
        dp[i+1][bit|1<<k] %= mod
print(dp[n][(1<<n)-1])
### BUGGY CODE ###

from scipy.sparse.csgraph import floyd_warshall
N = int(input())
dic = [0]*N
for i in range(N):
  dic[i] = [int(c) for c in input().split()]

d = floyd_warshall(dic)
ans = 0
for i in range(N-1):
  for j in range(i+1,N):
    if d[i][j] < dic[i][j]:
      print(-1)
      import sys
      sys.exit()
    elif dic[i][j] == d[i][j]:
      flag = False
      for k in range(N):
        if k==i or k==j:
          continue
        if d[i][j] == d[i][k]+d[k][j]:
          flag = True
          break
      if flag:
        continue
    ans += dic[i][j]

print(ans)

### FIXED CODE ###

from collections import defaultdict
N = int(input())
cost = [[0]*N for i in range(N)]
dist = [[0]*N for i in range(N)]
log = defaultdict(int)
for i in range(N):
  inf = [int(c) for c in input().split()]
  for j in range(N):
    cost[i][j] = inf[j]
for i in range(N):
  for j in range(i+1,N):
    m = float('inf')
    for k in range(N):
      if cost[i][j]>=cost[i][k]+cost[k][j]:
        m = min(m,cost[i][k]+cost[k][j])
        if k != i and k!= j:
          log[(min(i,j),max(i,j))] = 1
    dist[i][j] = m
    dist[j][i] = m
ans = 0
for i in range(N):
  for j in range(i+1,N):
    flag = False
    if dist[i][j]<cost[i][j]:
      print(-1)
      flag = True
      break
    elif log[(i,j)]==0:
      ans += cost[i][j]
  if flag:
    break
else:
  print(ans)
### BUGGY CODE ###

height, width = map(int, input().split(" "))
target = []
queue = []
WHITE = "."
BLACK = "#"
for h in range(height):
    temp = [n for n in input()]
    for w in range(width):
        if temp[w] == BLACK:
            queue.append([w, h])
    target.append(temp)
all_move = [[0, 1], [0, -1], [1, 0], [-1, 0]]

answer = 0
while queue:
    next_queue = []
    for q in queue:
        here_x, here_y = q
        for x, y in all_move:
            next_x, next_y = here_x + x, here_y + y
            if 0 <= next_x < width and 0 <= next_y < height:
                if target[next_y][next_x] == WHITE:
                    next_queue.append([next_x, next_y])
                    target[next_y][next_x] = BLACK
    if not next_queue:
        print(answer)
        break
    queue = next_queue
    answer += 1
                    

### FIXED CODE ###

height, width = map(int, input().split(" "))
target = []
queue = []
WHITE = "."
BLACK = "#"
for h in range(height):
    temp = [n for n in input()]
    for w in range(width):
        if temp[w] == BLACK:
            queue.append([w, h])
    target.append(temp)
all_move = [[0, 1], [0, -1], [1, 0], [-1, 0]]

answer = 0
while queue:
    next_queue = []
    for q in queue:
        here_x, here_y = q
        for x, y in all_move:
            next_x, next_y = here_x + x, here_y + y
            if 0 <= next_x < width and 0 <= next_y < height:
                if target[next_y][next_x] == WHITE:
                    next_queue.append([next_x, next_y])
                    target[next_y][next_x] = BLACK
    if not next_queue:
        print(answer)
        break
    queue = next_queue
    answer += 1
### BUGGY CODE ###

from collections import Counter
n=int(input())
*a,=map(int, input().split())
sa=Counter(a)

if 1 in sa:
    if sa[1]>1:
        print(0)
    else:
        print(1)
    exit()

# def fct(x):
#     f1=[1]
#     f2=[]
#     for i in range(2,min(int(x**(1/2)+7),x)):
#         if x%i==0:
#             f1.append(i)
#             f2.append(x//i)
#     return (set(f1+f2))
ans=0
for ai in sa:
    if sa[ai]>1:
        continue
    
    ans+=1

    for i in range(2,min(int(ai**(1/2)+7),ai)):
        if ai%i==0:
            if i in sa or ai//i in sa:
                ans-=1
                break
print(ans)


### FIXED CODE ###

from collections import Counter
n=int(input())
*a,=map(int, input().split())
sa=Counter(a)

if 1 in sa:
    if sa[1]>1:
        print(0)
    else:
        print(1)
    exit()

# def fct(x):
#     f1=[1]
#     f2=[]
#     for i in range(2,min(int(x**(1/2)+7),x)):
#         if x%i==0:
#             f1.append(i)
#             f2.append(x//i)
#     return (set(f1+f2))
ans=0
for ai in sa:
    if sa[ai]>1:
        continue
    
    ans+=1
    if ai%2==0:
        for i in range(2,min(int(ai**(1/2)+7),ai)):
            if ai%i==0:
                if i in sa or ai//i in sa:
                    ans-=1
                    break
    else:
        for i in range(3,min(int(ai**(1/2)+7),ai),2):
            if ai%i==0:
                if i in sa or ai//i in sa:
                    ans-=1
                    break
print(ans)
### BUGGY CODE ###

a = list(map(int, input().split()))
s, m, b = sorted(a)
cnt = 0
while not b == m == s:
    m_s = m - s
    b_m = b - m
    if m_s % 2 == 0 and m < b and m_s != 0:
        cnt += m_s // 2
        s += m_s
    elif m_s % 2 == 1 and m < b:
        cnt += 1
        s += 1
        b += 1
    elif m_s == 0 and m < b:
        cnt += b_m
        break
print(cnt)

### FIXED CODE ###

a = list(map(int, input().split()))
s, m, b = sorted(a)
cnt = 0
m_s = m - s
cnt += b - m
cnt += m_s // 2

if m_s % 2 == 1:
    cnt += 2
print(cnt)
### BUGGY CODE ###

n,q=map(int,input().split())
s=input()
l=[0]*q
r=[0]*q
c=[0]*q
for i in range(q):
    l[i],r[i]=map(int,input().split())
for i in range(q):
    for j in range(l[i],r[i]):
        if s[j-1]=='A' and s[j]=='C':
            c[i]+=1
for i in range(q):
    print(c[i])

### FIXED CODE ###

n,q=map(int,input().split())
s=input()
l=[0]*q
r=[0]*q
c=[0]*n
ans=0
for i in range(q):
    l[i],r[i]=map(int,input().split())
if s[0]=='A' and s[1]=='C':
    c[0]=1
for i in range(1,n-1):
    if s[i]=='A' and s[i+1]=='C':
        c[i]=c[i-1]+1
    else:
        c[i]=c[i-1]
for i in range(q):
    print(c[r[i]-2]-c[l[i]-2])
### BUGGY CODE ###

from sys import maxsize,stdin,stdout


def solve(ls, n, k):
	dp = [maxsize] * n
	dp[0] = 0
	if n == 1:
		return 0
	dp[1] = abs(ls[1] - ls[0])
	for i in range(2, n):
		j = 1
		while j <= k and i - j >= 0:
			dp[i] = (min((dp[i - j] + abs((ls[i - j]) - ls[i])), dp[i]))
			j += 1

	return str(dp[n - 1])


n, k = map(int, stdin.readline().split())
ls = list(map(int, stdin.readline().split()))
stdout.write((solve(ls, n, k)))


### FIXED CODE ###

from sys import stdout, stdin, maxsize

n, k = map(int, stdin.readline().split())
ls = list(map(int, stdin.readline().split()))
dp = [maxsize] * (n + 1)
dp[1] = 0
if n == 1:
	print(0)
else:
	dp[2] = abs(ls[1] - ls[0])
	for i in range(3, n + 1):
		j = 1
		while j <= k and i - j >= 0:
			dp[i] = min(dp[i - j] + abs(ls[i - 1] - ls[i - 1 - j]), dp[i])
			j += 1
	print(dp[n])
### BUGGY CODE ###

import sys
input = sys.stdin.readline
sys.setrecursionlimit(10**7)

n, m = [int(x) for x in input().split()]
g = [[] for _ in range(n)]
for _ in range(m):
    x, y = [int(x) for x in input().split()]
    g[x - 1].append(y - 1)

memo = [-1]*n

def dp(v):
    if memo[v] >= 0:
        return memo[v]
    else:
        res = 0
        for u in g[v]:
            res = max(res, dp(u) + 1)
        return res
ans = -1
for i in range(n):
    ans = max(ans, dp(i))
print(ans)




### FIXED CODE ###

import sys
input = sys.stdin.readline
n, m = [int(x) for x in input().split()]
g = [[] for _ in range(n)]
for _ in range(m):
    x, y = [int(x) for x in input().split()]
    g[x - 1].append(y - 1)
from functools import lru_cache
sys.setrecursionlimit(10**7)
@lru_cache(maxsize=None)
def dp(v):
    res = 0
    for u in g[v]:
        res = max(res, dp(u) + 1)
    return res
ans = -1
for i in range(n):
    ans = max(ans, dp(i))
print(ans)
### BUGGY CODE ###

# abc177_c.py
N = int(input())
A = list(map(int,input().split()))
ans = 0
mod = 10**9+7
for i in range(N):
    for j in range(i,N):
        if i != j:
            ans+=A[i]*A[j]
            ans%=mod
print(ans%mod)


### FIXED CODE ###

def solve():
    N = int(input())
    A = list(map(int, input().split()))
    square = []
    for i in A:
        square.append(i**2)
    return (sum(A)**2 - sum(square))//2 % (10**9+7)


print(solve())
### BUGGY CODE ###

R,G,B,N=(int(x) for x in input().split())
cnt=0
max=[N//R,N//G,N//B]
for r in range(max[0]+1):
    for g in range(max[1]+1):
        for b in range(max[2]+1):
            v=(R*r)+(G*g)+(B*b)
            if v>N:
                continue
            if v==N:
                cnt+=1
print (cnt)

### FIXED CODE ###

R,G,B,N=list(map(int,input().split()))
cnt=0
for r in range((N//R)+1):
    for g in range(((N-R*r)//G)+1):
        if (N-R*r-G*g)%B==0:
            cnt=cnt+1
print (cnt)