problem_id
stringclasses
428 values
submission_id
stringlengths
10
10
status
stringclasses
2 values
code
stringlengths
5
816
p03799
s506794551
Accepted
n, m = map(int,input().split()) ans = 0 if n*2 >= m: ans += m//2 else: ans += n m -= n*2 ans += m//4 print(ans)
p02678
s212392728
Accepted
import networkx as nx n,m=map(int,input().split()) s=[list(map(int,input().split())) for i in range(m)] g=nx.Graph() g.add_edges_from(s) print("Yes") for x in sorted(nx.bfs_predecessors(g,1)): print(x[1])
p03524
s661675391
Accepted
from collections import Counter S = input() C = Counter(S) vs = sorted(list(C.values())) if len(vs) == 1: print("YES") if vs[0] == 1 else print("NO") elif len(vs) == 2: print("YES") if vs[0] == vs[1] and vs[0] == 1 else print("NO") else: print("YES") if vs[2] - 1 <= vs[0] and vs[2] - 1 <= vs[1] else print("NO")
p03827
s051581430
Accepted
n = int(input()) s = input() x = 0 max = 0 for i in range(n): if s[i]=='I': x += 1 if x > max: max = x else: x -= 1 print(max)
p02970
s344030139
Accepted
from sys import stdin nii=lambda:map(int,stdin.readline().split()) lnii=lambda:list(map(int,stdin.readline().split())) n,d=nii() num=d*2+1 print((n+num-1)//num)
p02627
s986784042
Accepted
import sys input = sys.stdin.readline x = input() print('A' if x.isupper() else 'a')
p03633
s583844013
Wrong Answer
def gcd(a, b): if(a == 0): return b return gcd(b % a, a) def lcm(a, b): return int(a/(gcd(a, b) * b)) t = int(input()) ans = 1 while(t != 0): t -= 1 n = int(input()) ans = lcm(ans, n) ans = int(ans) print(int(ans))
p02628
s063522656
Wrong Answer
a,b = map(int,input().split()) mylist = input().split() mylist.sort() c = 0 print(mylist) for i in range(b-1): c = c + int(mylist[i-1]) print(c)
p03352
s894467286
Wrong Answer
a=int(input()) i=0 while i**2<=a: i=i+1 print((i-1)**2)
p03208
s731302246
Accepted
import sys def main(): N, K = list(map(int,input().split())) h = [0] * N for i in range(N): h[i] = int(input()) h = sorted(h) ave = [] for j in range(0,N-K+1): ave.append(abs(h[j]-h[j+K-1])) print(min(ave)) main()
p03161
s442403370
Wrong Answer
N,K = map(int, input().split()) h = list(map(int, input().split())) dp = [float('inf')] * 10 ** 5 dp[0] = 0 for i in range(1, N): tmp = i if tmp > K: tmp = K for j in range(1,tmp + 1): dp[i] = dp[i - j] + abs(h[i - j] - h[i]) print(dp[N-1])
p03407
s169613284
Wrong Answer
a,b,c=map(int,input().split()) z=0 for i in range (1000): if c-a*i<0: break if (c-a*i)%b==0: Z=1 break print("Yes" if z==1 else "No")
p02996
s661626196
Wrong Answer
n = int(input()) i = 0 ab = [] while i < n: a, b = map(int, input().split()) ab.append((a, b)) i += 1 ab.sort(key=lambda x: x[1], reverse=True) limit = ab[0][1] - ab[0][0] i = 1 ans = 'Yes' while i < n: limit -= ab[i][0] if limit < 0: ans = 'No' break i += 1 print(ans)
p03695
s787729380
Accepted
n = int(input()) a = list(map(int, input().split())) s = [0] * 13 for i in a: s[i // 400] += 1 ans = 0 for i in range(8): if s[i] > 0: ans += 1 print(max(1, ans), ans + sum(s[8:]))
p02843
s245134465
Accepted
n = int(input()) if n//100*5 >= n%100: print(1) else: print(0)
p02835
s367934120
Accepted
a = list(map(int, input().split())) if sum(a) >= 22: print("bust") else: print("win")
p04031
s296716008
Accepted
def resolve(): N = int(input()) A = sorted(list(map(int, input().split()))) start, end = min(A), max(A) mincost = float("inf") for i in range(start, end+1): _cost = 0 for a in A: _cost += abs(a-i)**2 mincost = min(mincost, _cost) print(mincost) if '__main__' == __name__: resolve()
p03126
s289482429
Accepted
n,m = map(int,input().split()) ans = [int(0) for i in range(m+1)] for i in range(n): k = list(map(int,input().split())) for j in range(1,k[0]+1): ans[k[j]] += 1 #print(ans) cnt = 0 for i in range(1,len(ans)): if ans[i]==n: cnt += 1 print(cnt)
p02859
s494086323
Wrong Answer
r = int(input()) print("r ** 2")
p02546
s179619045
Wrong Answer
s=input() print(s+'es'[s[-1]<'s':])
p02767
s361853535
Accepted
n = int(input()) X = list(map(int,input().split())) ans = 10000000 for p in range(1,101): s = 0 for x in X: s += (x - p) ** 2 ans = min(ans, s) print(ans)
p03408
s197583879
Wrong Answer
n = int(input()) s = list() for a in range(n): s.append(input()) t = list() m = int(input()) for a in range(m): t.append(input()) kind = list(set(s)) kind_length = len(kind) counter = dict() for a in range(kind_length): counter[kind[a]] = 0 for a in range(n): counter[s[a]] += 1 for a in range(m): if t[a] not in counter: continue counter[t[a]] -= 1 print(max(counter.values()))
p02847
s254256253
Accepted
import sys sys.setrecursionlimit(4100000) import math INF = 10**9 def main(): S = input() weeks = ['SUN','MON','TUE','WED','THU','FRI','SAT'] for i in range(len(weeks)): if weeks[i] == S: print(7-i) return if __name__ == '__main__': main()
p02747
s887851335
Wrong Answer
S = str(input()) ans = 0 if len(S) == 1: print('No') ans = 1 for i in range(len(S)-1): if S[i] == 'h' and S[i+1] != 'i': print('No') ans = 1 break if ans == 0: print('Yes')
p02983
s533266185
Accepted
def main(): L, R = [int(i) for i in input().split()] if (L//2019) < (R//2019): ans = 0 else: ans = 10 ** 10 for l in range(L, R+1): for r in range(l+1, R+1): ans = min(ans, (l*r)%2019) print(ans) if __name__ == "__main__": main()
p03761
s533267862
Accepted
N = int(input()) al = [chr(ord('a') + i) for i in range(26)] out = dict(zip(al,[100]*26)) for i in range(N): S = list(input()) tmp = dict(zip(al,[0]*26)) for T in S: tmp[T] += 1 for key in out.keys(): out[key]=min(out[key],tmp[key]) outS = "" for key in out.keys(): outS += key*out[key] print(outS)
p02958
s920345716
Accepted
n = int(input()) p_list = list(map(int,input().split())) count = 0 for i in range(n): if i+1 != p_list[i]: count+=1 if count ==0 or count==2: print('YES') else: print('NO')
p02818
s307242565
Accepted
A, B, K = map(int, input().split()) if K <= A: print(A-K, B) elif K <= A+B: print(0, B-(K-A)) else: print(0, 0)
p02996
s583275372
Accepted
N = int(input()) AB = [] for _ in range(N): A, B = map(int,input().split()) AB.append([B,A]) AB.sort() t = 0 for i in range(N): t += AB[i][1] if t > AB[i][0]: print("No") exit() print("Yes")
p02570
s636501023
Accepted
# 入力 D, T, S = input().split() # 以下に回答を記入 D = int(D) T = int(T) S = int(S) if D - T * S <= 0: print('Yes') else: print('No')
p02881
s597556799
Accepted
N = int(input()) ans = N-1 for i in range(2, int(N**0.5)+1): if N%i == 0: ans = min([ans, i+N//i-2]) print(ans)
p03455
s309557910
Accepted
a,b = [int(i) for i in input().split()] print("EOvdedn"[a*b%2::2])
p02742
s586885825
Accepted
H,W = map(int,input().split()) if H == 1 or W == 1: print(1) else: print((H*W+1)//2)
p02912
s137809278
Accepted
import math # noqa import bisect # noqa import queue # noqa if __name__ == '__main__': N, M = map(int, input().split()) A = list(map(int, input().split())) que = queue.PriorityQueue() for a in A: que.put(-a) while M > 0: M -= 1 a = que.get() que.put(-(-a // 2)) ans = 0 while not que.empty(): ans += -que.get() print(ans)
p02848
s280735267
Wrong Answer
n=int(input()) s=input() alpha=[chr(i) for i in range(ord("A"),ord("Z")+1)] encode=alpha[n:]+alpha[:n] text=[] for c in s: text.append(encode[alpha.index(c)]) print("".join)
p03796
s188260024
Wrong Answer
n=int(input()) mod=10**9+7 p=n for i in range(n): p*=i+1 p=p%mod print(p)
p04044
s210408022
Accepted
N,L=map(int,input().split()) lst=[] for _ in range(N): arg=input() lst.append(arg) lst.sort() print(''.join(lst))
p02706
s406276484
Accepted
m,n = map(int,input().split()) l = list(map(int,input().split())) s = 0 for i in range(n): s += l[i] print(max(m-s,-1))
p02594
s219760273
Accepted
X=int(input()) if X>=30: print("Yes") else: print("No")
p02756
s524839773
Wrong Answer
s=input() n=int(input()) r=-1 for i in range(n): q=input().split() if q[0]=='1': r*=-1 else: t=int(q[1]) if t*r==(-1 or 2): s=q[2]+s else: s=s+q[2] if r==1: s=s[::-1] print(s)
p03435
s458898035
Wrong Answer
ll=[list(map(int,input().split())) for i in range(3)] for i in range(2): for j in range(i+1,3): for k in range(3): if ll[k][i]==ll[k][j]: if not all(ll[t][i]==ll[t][j] for t in range(3)): print('No') exit() if ll[i][k]==ll[j][k]: if not all(ll[i][t]==ll[j][t] for t in range(3)): print('No') exit() print('Yes')
p02608
s867664677
Accepted
n = int(input()) cont = [0 for i in range(10050)] for x in range(1,105): for y in range(1,105): for z in range(1,105): v = x**2 + y**2 + z**2 + z*x + y*z + x*y if v <= 10001: cont[v]+=1 for i in range(1,n+1): print(cont[i])
p02820
s318374892
Wrong Answer
N, K = map(int, input().split()) R, S, P = map(int, input().split()) T = list(input()) opt = { "r": "p", "s": "r", "p": "s" } ans = 0 prev = [] for i, x in enumerate(T): if i - K >= 0 and opt[x] == prev[i-K]: prev.append(x) else: prev.append(opt[x]) for i, x in enumerate(prev): if x == T[i]: pass else: ans += eval(x.upper()) print(ans)
p02682
s636993049
Accepted
a,b,c,k=map(int,open(0).read().split()) if k<=a+b: print(min(a,k)) else: cntc=k-a-b print(a-cntc)
p02608
s902245572
Accepted
import math N = int(input()) S = [0]*N lim = math.sqrt(N) lim = math.floor(lim) for i in range(1,lim): for j in range(1,lim): for k in range(1,lim): temp = int(i**2+ j**2 + k**2 + i*j + j*k + k*i) if temp <N+1: S[temp-1] += 1 for i in range(N): print(S[i])
p02608
s604333815
Wrong Answer
def func(n): cnt = 0 for x in range(1, 101): for y in range(1, 101): for z in range(1, 101): if x**2+y**2+z**3+x*y+y*z+z*x == n: cnt += 1 return(cnt) n = int(input()) for i in range(1, n+1): print(func(i))
p04020
s160078062
Accepted
n = int(input()) cur = 0 res = 0 for _ in range(n): x = int(input()) if x == 0: res += cur // 2 cur = 0 else: cur += x res += cur // 2 print(res)
p02848
s965435595
Wrong Answer
n = int(input()) s = input() ans = s[:-1] + chr((ord(s[-1])+n-1 - ord('A'))%26 + 1 + ord('A')) print(ans)
p02714
s096875471
Accepted
N = int(input()) S = input() r = S.count('R') g = S.count('G') b = S.count('B') ans = r*g*b for i in range(0,N): for j in range(i,N): k = 2*j - i if j < k <= N-1: if S[i] != S[j] and S[i] != S[k] and S[j] != S[k]: ans -= 1 print(ans)
p03711
s820833316
Wrong Answer
x, y = map(int, input().split()) group_1 = [1, 3, 5, 7, 8, 10, 12] group_2 = [4, 6, 9, 11] if x == 2 or y == 2: print("No") exit() else: if x in group_1 and y in group_1: print("Yes") elif x in group_2 and y in group_2: print("Yes")
p03555
s857616143
Accepted
a = input() b = input() if a[::-1] == b: print("YES") else: print("NO")
p02713
s587179906
Wrong Answer
import math math.gcd(2,10) N =int(input()) total = 0 a=1 b=1 c=1 if N ==1: total =1 while a <=N: b=1 while b <=N: c=1 while c <=N: if math.gcd(a,b)==1: total += N break total += math.gcd(a,math.gcd(b,c)) c+=1 b+=1 a+=1 print(total)
p02731
s887653623
Accepted
l = int(input()) x = l / 3 print(x ** 3)
p03544
s638464502
Accepted
N = int(input()) L = [0 for i in range(N+1)] if N == 1: print(1) else: L[0] = 2 L[1] = 1 for n in range(2,N+1): L[n] = L[n-1] + L[n-2] print(L[N])
p03705
s081733428
Accepted
N, A, B = map(int,input().split()) min = A * (N - 1) + B max = B * (N - 1) + A if (max - min) + 1 < 0: print("0") else: print((max - min) + 1)
p03644
s064265803
Wrong Answer
n=int(input()) maxx=0 maxn=0 for i in range(1,n+1): tmp=i cnt=0 while 1: if tmp%2==0: tmp=tmp//2 cnt+=1 else: break if cnt > maxx: maxn=tmp print(maxn)
p02606
s987913791
Accepted
l,r,d=list(map(int,input().split())) cnt=0 for i in range(l,r+1): if i%d==0: cnt+=1 print(cnt)
p03767
s369629304
Wrong Answer
N=int(input()) ai=list(map(int,input().split())) ai.sort() ans1=ai[N:] ans2=ans1[:N] print(ans1) print(ans2) print(sum(ans2))
p02897
s816615490
Accepted
X = int(input()) print(((X//2)+1)/X if X % 2 != 0 else 0.5)
p03243
s284390406
Wrong Answer
n = set(input()) print(max(n)*3)
p03720
s430026930
Accepted
f = lambda:map(int,input().split()) n,m = f() d = {} for i in range(n): d[i+1]=0 for _ in range(m): a,b = f() d[a] += 1 d[b] += 1 for k in d: print(d[k])
p03071
s731091522
Accepted
a,b=map(int,input().split()) print(max(a+a-1,a+b,b+b-1))
p03475
s172316313
Accepted
n=int(input()) L=[] for _ in range(n-1): L.append(tuple(map(int,input().split()))) ans=[] for i in range(n-1): c,t,f=L[i] t += c for j in range(i+1,n-1): cn,sn,fn=L[j] if t>sn: t=-int(-t//fn)*fn else: t=sn t += cn ans.append(t) ans.append(0) for i in ans: print(i)
p02970
s322080550
Accepted
n,d=map(int,input().split()) if n%(2*d+1)!=0: a=n//(2*d+1)+1 else: a=n//(2*d+1) print(a)
p02756
s801955552
Wrong Answer
from collections import deque import sys input = sys.stdin.readline S = input().rstrip() Q = int(input()) FTC = [tuple(input().split()) for _ in range(Q)] que = deque([S]) cnt = 0 for query in FTC: if query[0] == '1': cnt ^= 1 continue sign = 0 if query[1] == '1' else 1 if sign ^ cnt == 0: que.appendleft(query[2]) else: que.append(query[2]) ans = '' while que: ans += que.popleft() if cnt == 0 else que.pop() print(ans)
p02972
s704614727
Wrong Answer
n=int(input()) a=list(map(int,input().split())) ans=[0]*(n+1) for i in range(n,0,-1): temp=0 for j in range(i,n+1,i): temp+=ans[j] if a[i-1]!=temp%2: ans[i]=1 print(sum(ans)) for i in range(n): if ans[i]==1: print(i,end=" ")
p02933
s862146421
Wrong Answer
if int(input())>= 3200: print("red") else: print(input())
p02756
s557253871
Accepted
s = input() p = int(input()) dir = 0 mae = [] usi = [] for _ in range(p): Q = input().split() if Q[0] == "1": dir = not dir else: if (int(Q[1]) - 1) == dir: mae.append(Q[2]) else: usi.append(Q[2]) ans = "".join(mae[::-1]) + s + "".join(usi) if not dir: print(ans) else: print(ans[::-1])
p02882
s741252762
Accepted
import math a,b,x=map(int,input().split()) S=x/a if S<=a*b/2: h=2*S/b answer=math.degrees(math.atan(b/h)) print(answer) else: T=a*b-S h=2*T/a answer=math.degrees(math.atan(h/a)) print(answer)
p02711
s401862967
Wrong Answer
n = list(str(input())) flag = True for i in range(len(n)): if n[i] == '7': print('YES') flag = False break if flag: print('NO')
p03994
s030644331
Accepted
t="abcdefghijklmnopqrstuvwxyz" s=input() k=int(input()) a=[t.index(i)for i in s] ans="" for i in a: j=i if i==0: ans+="a" continue if k>=26-i: k-=26-i j=0 ans+=t[j] j+=k j%=26 ans=ans[:-1]+t[j] print(ans)
p03206
s763829570
Accepted
D = int(input()) if D == 25: print('Christmas') elif D == 24: print('Christmas Eve') elif D == 23: print('Christmas Eve Eve') else: print('Christmas Eve Eve Eve')
p03639
s974570137
Accepted
n=int(input()) a=list(map(int,input().split())) b=[0,0,0] for i in a: if i % 4==0: b[0]+=1 elif i % 2==0: b[1]+=1 else: b[2]+=1 if b[2]<=b[0]: print("Yes") elif b[2]-1==b[0] and b[1]==0: print("Yes") else: print("No")
p02705
s615936922
Wrong Answer
print(int(input())*3.14159)
p02603
s255548587
Wrong Answer
n=int(input()) I=list(map(int,input().split())) num=1000 for i in range(n-1): if I[i]<I[i+1]: num-=(num//I[i])*I[i] num+=(num//I[i])*I[i+1] print(num)
p03457
s508178105
Wrong Answer
N = int(input()) cs = [] t1, x1, y1 = 0, 0, 0 ans = 'Yes' for i in range(N): t2, x2, y2 = map(int, input().split()) d = abs(x1-x2) + abs(y1+y2) if d > (t2 - t1) or d % (t2 - t1): ans = 'No' print(ans)
p02796
s746881188
Accepted
from collections import deque n = int(input()) list = [list(map(int,input().split())) for i in range(n)] p = [] for i in list: p.append([i[0] - i[1],i[0] + i[1]]) p = sorted(p,key = lambda x: x[1]) p = deque(p) ex = [] ex.append(p.popleft()) for i in range(len(p)): if(ex[-1][1] <= p[0][0]): ex.append(p.popleft()) else: p.popleft() print(len(ex))
p02602
s210125162
Wrong Answer
import sys import math sys.setrecursionlimit(int(1e6)) n, k = list(map(int, input().split())) A = list(map(int, input().split())) #print('n, k = ', n, k) #print('A = ', A) i_l = 0 for i_r in range(k, n): #print('i_l, i_r = ', i_l, i_r) if A[i_l] > A[i_r]: print('No') else: print('Yes') i_l = i_l + 1
p02743
s953542260
Accepted
import math a,b,c=map(int,input().split()) aa=math.sqrt(a) bb=math.sqrt(b) cc=math.sqrt(c) ans=a**2+b**2+c**2-2*(a*b+b*c+a*c) ans2=((aa+bb+cc)*(c-a-b+2*math.sqrt(a*b))) print("Yes" if 0<ans/ans2 else "No")
p03827
s444181115
Wrong Answer
n=int(input()) s=input() ans=[] for i in range(len(s)): ans.append(s[:i].count("I")-s[:i].count("D")) print(max(ans))
p03711
s732134949
Accepted
S="ACABABAABABA" a,b = map(int,input().split()) print("Yes" if S[a-1]==S[b-1] else "No")
p03434
s107092287
Accepted
N = int(input()) a = list(map(int, input().split())) a = sorted(a, reverse=True) Alice = 0 Bob = 0 for i in range(N): if i % 2 == 0: Alice += a.pop(0) else: Bob += a.pop(0) print(Alice - Bob)
p03077
s131194706
Wrong Answer
N = int(input()) A = int(input()) B = int(input()) C = int(input()) D = int(input()) E = int(input()) X = min(A, B, C, D, E) print((N+1)//X + 4)
p02594
s428544989
Accepted
x = int(input()) if x >= 30: print('Yes') else: print('No')
p02879
s964257481
Wrong Answer
a,b=map(int,input().split()) print([a*b,-1][a|b>9])
p03001
s783325608
Wrong Answer
W,H,x,y=map(int,input().split()) s=W*H/2 x=1 if W//2==x and H//2==y else 0 print('{} {}'.format(s,x))
p02596
s832278601
Wrong Answer
k = int(input()) a = 0 for i in range(k): a = (a*10+7)/k if a == 0: print(i+1) quit() print(-1)
p02882
s302789291
Accepted
import math a, b, water = map(int, input().split()) pool = a ** 2 * b if water == pool: ans = 0 elif water > pool / 2: high = 2 * (pool - water) / (a ** 2) ans = 90 - math.degrees(math.atan(a / high)) elif water == pool / 2: ans = 45 else: high = 2 * water / (a * b) ans = 90 - math.degrees(math.atan(high / b)) print(ans)
p02659
s022101282
Wrong Answer
a,b = input().split() a1 = int(a) bs = list(b) b1 = int(bs[0]) b2 = 0 if len(b)==3: b2 = int(bs[2])*10 else: b2 = int(bs[2]+bs[3]) b1 = b1*100+b2 ans = int(a1*b1/100) print(ans)
p03997
s267864040
Wrong Answer
a = int(input("上底は?")) b = int(input("下底は?")) h = int(input("高さは?")) daikei = (a + b) * h / 2 print("台形の面積は", daikei, "cm2")
p03035
s325803481
Wrong Answer
a, b = map(int, input().split()) if a >= 13: print(b) elif a > 5 and a < 13: print(b/2) else: print(0)
p02820
s411866993
Accepted
n, k = map(int, input().split()) s = list(map(int, input().split())) # r, s, p t = list(map(str, input())) ans = 0 for i in range(n): if i-k >= 0: if t[i] == t[i-k]: t[i] = 'change' else: continue for j in range(n): if t[j] == 'r': ans += s[2] elif t[j] == 's': ans += s[0] elif t[j] == 'p': ans += s[1] else: continue print(ans)
p03699
s686906146
Accepted
N = int(input()) a = [int(input()) for _ in range(N)] a.sort() sum_a = sum(a) d = sum_a for i in range(N): if a[i]%10 != 0: d = a[i] break if sum_a%10 != 0: ans = sum_a else: ans = sum_a-d print(ans)
p03001
s645155231
Wrong Answer
w,h,x,y=map(int,input().split()) if x==w or x==0: if y==h or y==0: print(0.0,0) else: w2=w//2 h2=h//2 s1=h*w2 s2=w*h2 if s1>s2: print(s1,0) elif s1==s2: print(s1,1) else: print(s2,0)
p03030
s393295284
Accepted
N = int(input()) SP =[] for i in range(N): S, P = input().split() app = [i+1,S,int(P)] SP.append(app) SP.sort(key=lambda x: x[2], reverse=True) SP.sort(key=lambda x: x[1]) for i in range(N): print(SP[i][0])
p02601
s264500978
Accepted
a, b, c = map(int, input().split()) k = int(input()) for i in range(k): if a >= b: b *= 2 elif b >= c: c *= 2 if a < b and b < c: print('Yes') else: print('No')
p02696
s631727051
Accepted
A,B,N=map(int,input().split()) if N<B: print(A*N//B-A*(N//B)) else: print(A*(B-1)//B)
p02572
s884020738
Accepted
N = int(input()) A = list(map(int,input().split())) sum = 0 ans = 0 for i in range(1, N): sum +=A[i-1] sum = sum % (10**9 + 7) ans = ans + (sum * A[i]) % (10**9 + 7) ans = ans % (10**9 + 7) print(ans)
p03286
s086334448
Wrong Answer
a = int(input("")) list = [] while(a): if(a%(-2)==0): list.append(0) a//=-2 elif(a%(-2)==-1): list.append(1) a -= 1 a//=-2 list.reverse() for i in list:print(i,end='') print()
p03797
s877012738
Wrong Answer
n,m=[int(x) for x in input().rstrip().split()] mm=m//2 ave=(n+mm)//2 print(ave)