problem_id
stringclasses
428 values
submission_id
stringlengths
10
10
status
stringclasses
2 values
code
stringlengths
5
816
p03219
s230194416
Accepted
X, Y = map(int, input().split()) y = Y // 2 a = X + y print(a)
p03617
s746718776
Accepted
q,h,s,d=map(int,input().split()) n=int(input()) print((n//2)*min(8*q,4*h,2*s,d)+(n%2)*min(4*q,2*h,s))
p03611
s188449682
Accepted
N=int(input()) A=list(map(int,input().split())) A_={} for _ in range(-1,10**5+10): A_[_]=0 for a in A: a_b = a-1 a_a = a+1 A_[a] +=1 A_[a_b] +=1 A_[a_a] +=1 ans = 0 ans_idx = 0 for k in A_.keys(): a = A_[k] if ans < a: ans = a ans_idx = k # print(ans_idx,ans) print(ans)
p02797
s081184983
Accepted
n,k,s = map(int,input().split()) ans = [] if s==10**9: for i in range(n): if i < k: ans.append(s) else: ans.append(1) else: for i in range(n): if i < k: ans.append(s) else: ans.append(s+1) print(*ans)
p03699
s663341193
Accepted
n = int(input()) s = sorted([int(input()) for _ in range(n)]) grade = 0 if sum(s) % 10 == 0 else (sum(s)) if grade == 0: for i in s: if i % 10 != 0: print(sum(s) - i) exit() print(grade)
p03555
s321861292
Accepted
n = input() l = input() ans = True #print(n[0]) #print(n[]) for i in range(len(n)): if i ==0: if n[0] == l[-1]: continue else : ans = False break elif n[i] == l[-i-1]: continue else : ans = False break if ans: print("YES") else: print("NO")
p03592
s906805947
Accepted
def main(): n, m, k = map(int, input().split()) f = False for i in range(n+1): for j in range(m+1): if i*j + (n-i)*(m-j) == k: f = True if f: print("Yes") else: print("No") if __name__ == "__main__": main()
p02677
s493344313
Wrong Answer
import math a, b, h, m = map(int, input().split()) d_a = h * 30 + m * 0.5 d_b = m * 6 if d_a > d_b: d_a, d_b = d_b, d_a d = d_b - d_a if d > 180: d -= 180 # print(d) if d == 180: print(a + b) else: print(math.sqrt(a ** 2 + b ** 2 - 2 * a * b * math.cos(math.radians(d))))
p02811
s140106324
Accepted
n = 500 x, y = map(int, input().split()) if x*n >= y: print("Yes") else: print("No")
p02691
s694373011
Wrong Answer
n=int(input()) a=list(map(int,input().split())) b=[a.index(i)+1-i for i in a] c=[a.index(i)+1+i for i in a] from collections import defaultdict B=defaultdict(int) C=defaultdict(int) for i in range(len(a)): B[b[i]]+=1 C[c[i]]+=1 ans=0 for i in B: ans+=B[i]*C[i] print(ans)
p02811
s341212386
Accepted
k,x = map(int,input().split()) if 500*k>=x: print('Yes') else: print('No')
p03804
s194328976
Accepted
n,m = map(int, input().split()) a = [input() for _ in range(n)] b = [input() for _ in range(m)] ans = 'No' for di,dj in [(pi,pj) for pi in range(n-m+1) for pj in range(n-m+1)]: for i,j in [(pi,pj) for pi in range(m) for pj in range(m)]: if a[di+i][dj+j] != b[i][j]: break else: ans = 'Yes' break print(ans)
p03351
s041120288
Accepted
a,b,c,d=map(int,input().split()) if abs(a-b)<=d and abs(b-c)<=d or abs(a-c)<=d: print('Yes') else: print('No')
p02948
s524338146
Accepted
n,m=map(int,input().split()) d=[[]for i in range(m+1)] from heapq import heappush,heappop,heapify q=[] for i in range(n): a,b=map(int,input().split()) if a<=m: d[-a-1].append(b) ans=0 for i in d[::-1]: for j in i: heappush(q,-j) if q: ans+=-heappop(q) print(ans)
p03797
s614823095
Wrong Answer
N,M=list(map(int, input().split())) K=N-2*M print(max(N+K//3,N))
p02697
s196639060
Accepted
n,m=map(int,input().split()) diffs=set() idxs=set() i=1 diff=n-1 cnt=0 while 1: if i>m: break while (diff in diffs and n-diff in diffs) or (i+diff in idxs) or (diff==n-diff): diff-=1 diffs.add(n-diff) diffs.add(diff) idxs.add(i+diff) print(i,i+diff) i+=1
p02970
s397372143
Wrong Answer
N, D = map(int, input().split(" ")) print(N//(2*(D+1)) + 1)
p03069
s208300769
Wrong Answer
n=int(input()) s=list(input()) switch=0 count=0 for i in s: if i=='#': if switch==0: switch=1 else: if switch==1: count += 1 print(count)
p03351
s637217933
Accepted
a,b,c,d = map(int,input().split()) if (abs(a-b)<=d and abs(c-b)<=d) or abs(a-c)<=d: print("Yes") else: print("No")
p02718
s448819244
Wrong Answer
import math n,m = map(int, input().split()) A = list(map(int, input().split())) line = math.floor(sum(A) / (4 * m)) cnt = 0 for a in A: if a >= line: cnt += 1 if cnt >= m: print('Yes') break else: print('No')
p02802
s444623360
Wrong Answer
n,m = map(int, input().split()) b = [0]*(n+1) AC,WA = 0,0 for _ in range(m): p,s = map(str, input().split()) if b[int(p)] == 0: if s == "AC": AC += 1 b[int(p)] = 1 else: WA += 1 print(AC,WA)
p03639
s217956954
Accepted
n = int(input()) a = list(map(int, input().split())) c4 = 0 c2 = 0 for i in a: if i % 4 == 0: c4 += 1 elif i % 2 == 0: c2 += 1 if n - c4 - c2 <= c4: print('Yes') elif n - c4 - c2 - 1 <= c4 and c2 == 0: print('Yes') else: print('No')
p03943
s518201867
Accepted
a = list(int(i) for i in input().split()) a.sort() print("Yes" if a[0]+a[1]==a[2] else "No")
p03711
s523082785
Wrong Answer
def resolve(): a = [1, 3, 5, 6, 8, 10, 12] b = [4, 6, 9, 11] c = [2] x, y = map(int, input().split()) if x in a and y in a: print("Yes") elif x in b and y in b: print("Yes") elif x in c and y in c: print("Yes") else: print("No") resolve()
p03061
s624725024
Accepted
from math import* n=int(input()) a=list(map(int,input().split())) b=[a[0]] c=[a[-1]] for i in range(1,n): b+=[gcd(b[-1],a[i])] c+=[gcd(c[-1],a[-i-1])] ans=0 c=c[::-1] for i in range(n): if i==0:ans=max(ans,c[i+1]) elif i==n-1:ans=max(ans,b[i-1]) else: ans=max(ans,gcd(c[i+1],b[i-1])) print(ans)
p03745
s066620737
Wrong Answer
n = int(input()) a = list(map(int, input().split())) cnt = 0 if n == 1: print (1) exit() c = 0 for i in range(n-1): if c == 2 and a[i+1] < a[i]: cnt += 1 c = -1 elif c == 1 and a[i+1] > a[i]: cnt += 1 c = -1 else: if a[i+1] > a[i]: c = 2 elif a[i+1] == a[i]: c = 0 else: c = 1 print (cnt+1)
p03803
s338983920
Accepted
a, b = map(lambda x: int(x), input().split()) if a == 1: a = 1 + 13 if b == 1: b = 1 + 13 if a < b: print('Bob') elif a > b: print('Alice') else: print('Draw')
p03698
s018585374
Wrong Answer
w = str(input()) for i in range(len(w)): for j in range(len(w)): if i != j: w[i] == w[j] f = True break else: f = False print('no' if f else 'yes')
p03657
s404500827
Wrong Answer
A, B = map(int,input().split()) if A % 3 == 0 or B % 3 ==0 or (A + B) % 3 ==0: print("possible") else: print("impossible")
p02687
s143564454
Accepted
print('A%sC'%'BR'[input()<'AR'])
p03126
s962981245
Accepted
N,M = map(int,input().split()) target = list() for i in range(N): target_list = list(map(int,input().split())) target_list.pop(0) target.append(target_list) # print(target) ans = dict() for i in range(0,len(target)): for j in range(len(target[i])): if i == 0: ans[target[i][j]] = 1 else: if target[i][j] in ans: ans[target[i][j]] += 1 ans_num = 0 for k in ans.keys(): if ans[k] == N: ans_num += 1 print(ans_num)
p02765
s928675202
Accepted
N, R = map(int, input().split()) if N < 10: n2=100*(10-N) R2 = R+n2 elif N >= 10: R2 = R print(R2)
p02847
s407011297
Accepted
s = input() L = ["SUN", "MON", "TUE", "WED", "THU", "FRI", "SAT"] print(7 - L.index(s))
p03284
s557531422
Accepted
n, k = map(int, input().split()) print(min(n%k,1))
p02720
s638413783
Accepted
from itertools import chain l = [[] for _ in range(11)] l[0] = list(map(str, range(1, 10))) for i in range(10): for x in l[i]: last = int(x[-1]) for m in {max(0, last-1), last, min(9 ,last+1)}: m = str(m) l[i+1].append(x+m) q = list(map(int, chain(*l))) q.sort() # print(len(q)) K = int(input()) print(q[K-1])
p03317
s921428061
Wrong Answer
import math def process_smaller_index(K, min_index): if min_index == 0: return 0 else: return math.ceil(min_index / K) def process_larger_index(last_index, K, min_index): if min_index == last_index: return 0 else: return math.ceil((last_index - min_index) / K) N, K = map(int, input().split()) A = [int(i) for i in input().split()] min_index = A.index(1) print(process_smaller_index(K - 1, min_index) + process_larger_index(len(A)-1, K - 1, min_index))
p02661
s393770941
Wrong Answer
n = int(input()) ab = [list(map(int, input().split())) for _ in range(n)] ab = sorted(ab, key=lambda x:int(x[1])) c = [ab[i][1]-ab[i][0] for i in range(n)] if n%2 == 1: center = n//2 answer = ab[center][1]-ab[center][0] else: center = [n//2-1,n//2] answer1 = ab[center[0]][1] - ab[center[0]][0]+1 answer2 = ab[center[1]][1] - ab[center[1]][0]+1 answer = answer1*answer2 - max(0,ab[center[0]][1]-min(ab[center[0]][0],ab[center[1]][1])) print(answer)
p02682
s958495195
Wrong Answer
A,B,C,K=map(int, input().split()) if A >= K: maxnum = A elif A<K and A+B>=K: maxnum = A else: maxnum = A - (K-A-B) print(maxnum)
p02622
s512273023
Accepted
S = list(input()) T = list(input()) count = 0 for i in range(len(S)): if S[i] == T[i]: continue else: count += 1 print(count)
p03086
s690855479
Accepted
s=input() ans=0 for i in range(len(s)): for j in range(len(s)): new_s=list(s[i:(len(s)-j)]) if all((i in ["A","T","G","C"]) for i in new_s) and len(new_s)>ans: ans=len(new_s) print(ans)
p02718
s465032792
Accepted
n,m = map(int,input().split()) a = list(map(int, input().split())) popular = list(filter(lambda e: e>=(1/(4*m))*sum(a),a)) print("Yes" if len(popular) >= m else "No")
p03261
s997677741
Wrong Answer
n = int(input()) l = [] ans = 'Yes' ps = 'a' for i in range(n): s = input() if s in l: ans = 'No' l.append(s) if i != 0 and ps[-1] != s[0]: ans = 'No' print(ans)
p02862
s424186788
Accepted
import sys sys.setrecursionlimit(10**7) input = sys.stdin.readline mod = 10**9+7 def comb(n, k): c = 1 for i in range(k): c *= n - i c %= mod d = 1 for i in range(1, k + 1): d *= i d %= mod return (c * pow(d, mod - 2, mod)) % mod x,y = map(int, input().split()) if (x + y) % 3 != 0: print(0) exit() n = (x + y) // 3 x -= n y -= n if x < 0 or y < 0: print(0) exit() print(comb(x + y, x))
p03434
s316623970
Accepted
n = int(input()) a = list(map(int, input().split())) A = sorted(a, reverse = True) ali = [] bob = [] for i in range(n): if i % 2 == 0: ali.append(A[i]) else: bob.append(A[i]) print(sum(ali) - sum(bob))
p03861
s824610394
Accepted
a,b,x = map(int, input().split()) print(b//x - (a-1)//x)
p03673
s252529604
Accepted
n = int(input()) a = list(map(int, input().split())) a_even = [elm_a for i, elm_a in enumerate(a) if i % 2 == 0] a_odd = [elm_a for i, elm_a in enumerate(a) if i % 2 == 1] ans = a_even[::-1] + a_odd if n % 2 == 0: ans = ans[::-1] print(' '.join(map(str, ans)))
p03220
s740028038
Accepted
N = int(input()) T,A = map(int,input().split()) H = list(map(int,input().split())) ans = 0 min_height = 10**18 for i in range(N): if abs(A - T + H[i]*0.006) < min_height: ans = i+1 min_height = abs(A - T + H[i]*0.006) print(ans)
p03962
s133290656
Accepted
a,b,c=map(int,input().split()) if a==b and b==c: print(1) elif a==b or b==c or c==a: print(2) else: print(3)
p02645
s859134830
Wrong Answer
S = input() print(S[0:2])
p02755
s212000199
Accepted
A, B = map(int, input().split()) for i in range(B*100): if i*8//100 == A and i * 10 // 100 == B: print(i) exit() print(-1)
p03998
s129757439
Wrong Answer
a = list(input()) b = list(input()) c = list(input()) ans = 'A' d = {'a': a, 'b': b, 'c': c} card = d['a'].pop() while a and b and c: card = d[card].pop() if not d['b']: ans = 'B' if not d['c']: ans = 'C' print(ans)
p02688
s134731576
Accepted
import itertools N,K=map(int,input().split()) A=[] for i in range(K*2): a=list(map(int,input().split())) if i%2==1: A.append(a) x=list(itertools.chain.from_iterable(A)) print(N-len(set(x)))
p03557
s486348879
Wrong Answer
from bisect import bisect_left 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() alters_count = 0 for a in A: bidx = bisect_left(B, a) if bidx == N: continue for b in B[bidx:]: cidx = bisect_left(C, b) if cidx == N: continue alters_count += N - cidx print(alters_count)
p02786
s546032092
Accepted
#!/usr/bin/env python # coding: utf-8 # In[25]: H = int(input()) # In[26]: import math # In[28]: print(int(2**(math.log2(H)//1 + 1)-1)) # In[ ]:
p03145
s004238176
Accepted
L=list(map(int,input().split())) print(L[0]*L[1]//2)
p03854
s185213941
Wrong Answer
S = input() sc = ["dreameraser", "dreamerase", "dreamer", "dream", "eraser", "erase"] for i in sc: S = S.replace(i, '') if len(S) == 0: print("YES") else: print("NO")
p02924
s664094583
Wrong Answer
import math n = int(input()) ans = 0.5 * (n-1)*n print(int(ans))
p02624
s391666495
Accepted
N = int(input()) ans = 0 for j in range(1, N+1): # ある数jのNまでの倍数をすべて足す。等差数列の和 n = N // j tmp = n * (2 * j + (n-1) * j) // 2 ans += tmp print(ans)
p03107
s355682482
Wrong Answer
S = str(input()) x = len(S) while '01' in S: S = S.replace('01', '') S = S.replace('10', '') print (x-len(S))
p02759
s741405816
Accepted
N=int(input()) print((N+1)//2)
p03632
s309649750
Wrong Answer
a,b,c,d = map(int,input().split()) if b<c: print(0) else: print(min(b,d)-c)
p02963
s890556039
Accepted
# https://atcoder.jp/contests/agc036/tasks/agc036_a s = int(input()) x1, y1 = 0, 0 x2 = 10 ** 9 y2 = 1 y3 = (s + x2 -1) // x2 x3 = x2 * y3 - s print(x1, y1, x2, y2, x3, y3)
p02836
s813268758
Wrong Answer
s = list(input()) s1 = s[::-1] count = 0 for i in range(len(s)): if s[i]!=s1[i]: count += 1 print(count)
p02784
s238154935
Wrong Answer
""" author : halo2halo date : 4, Feb, 2020 """ import sys # import itertools # import math # import numpy as np read = sys.stdin.buffer.read readline = sys.stdin.buffer.readline readlines = sys.stdin.buffer.readlines H, N,*A = map(int, read().split()) print('YES' if H<=sum(A) else 'No')
p02767
s148729312
Accepted
n = int(input()) x = list(map(int,input().split())) ans_list = [] for i in range(max(x)): ans = 0 for j in x: ans += (j-(i+1))**2 ans_list.append(ans) print(min(ans_list))
p02982
s534306067
Wrong Answer
#133 b import itertools n,d=map(int,input().split()) N=[i for i in range(n)] k=[i*i for i in range(1,100)] x=[] for i in range(n): a=list(map(int,input().split())) x.append(a) ans=0 kumi=itertools.combinations(N,2) for a,b in kumi: s=0 for j in range(d): s+=(x[a][j]-x[b][j])**2 if s in k: ans+=1 print(ans)
p03435
s169312152
Accepted
import numpy as np c = [[0]*3] * 3 for i in range(3): c[i] = list(map(int, input().split())) c = np.array(c) if len(set(c[0] - c[1])) == 1 and len(set(c[1] - c[2])) == 1 and len(set(c[:,0] - c[:,1])) == 1 and len(set(c[:,1] - c[:,2])) == 1: print("Yes") else: print("No")
p02795
s073498684
Accepted
H=int(input()) W=int(input()) N=int(input()) if W>=H: cnt=(N-1+W)//W else: cnt=(N-1+H)//H print(cnt)
p03323
s724965849
Accepted
a, b = map(int, input().split()) if max(a,b) <= 8: print('Yay!') else: print(':(')
p03067
s981580960
Accepted
a,b,c=map(int,input().split()) print("Yes" if a<c<b or b<c<a else "No")
p03274
s872196429
Accepted
n,k=map(int,input().split()) x=sorted(list(map(int,input().split()))) a=[] for i in range(n-k+1): l=x[i] r=x[i+k-1] a.append(min(abs(l)+abs(r-l),abs(r)+abs(l-r))) print(min(a))
p02994
s908976280
Wrong Answer
N, L = map(int, input().split()) if abs(L-1) <= N: i = abs(L - 1) else: i = N A = (N-1)*(L-1) + sum([n for n in range(1, N+1)]) - i print(A)
p03284
s128866139
Accepted
N,K = map(int,input().split()) if N % K != 0: print(1) else: print(0)
p03150
s991351130
Accepted
S = input() c = "keyence" if S[-7:] == c or S[:7] == c: print("YES") else: for i in range(1, 7): c_, _c = c[:i], c[i:] if S[:i] == c_ and S[-(7-i):] == _c: print("YES") break else: print("NO")
p02622
s337524396
Accepted
S = input() T = input() L = 0 for i in range(len(S)): if S[i] != T[i]: L += 1 else: continue print(L)
p02994
s826685941
Wrong Answer
n, l = map(int, input().split()) pie = 0 comp = 300 for i in range(1, n+1): pie = pie + l + i - 1 if abs(l + i -1) < comp: comp = l + i -1 print(comp) print(pie - comp)
p03481
s195970652
Accepted
X,Y = map(int,input().split()) con = 0 while X <= Y: con += 1 X = X * 2 print(con)
p02971
s302286791
Accepted
n = int(input()) a = list(int(input()) for _ in range(n)) aa = sorted(a.copy()) mx, sd = aa[n - 1], aa[n - 2] for i in a: print(mx if i < mx else sd)
p02778
s994482111
Accepted
s = len(str(input())) print('x'*s)
p02995
s223339286
Accepted
from fractions import gcd A, B, C, D = map(int,input().split()) total = B - A + 1 divC = B//C - (A-1)//C divD = B//D - (A-1)//D lcm = int(C * D / gcd(C, D)) divCD = B//lcm - (A-1)//lcm print(total - divC - divD + divCD)
p03323
s355369816
Accepted
import sys sys.setrecursionlimit(10**6) a,b=map(int,input().split()) if a<=8 and b<=8: print("Yay!") else: print(":(")
p03037
s241722331
Accepted
n, m = map(int, input().split()) l = 0 r = n for i in range(m): lt, rt = map(int, input().split()) l = max(l, lt) r = min(r, rt) if(l<=r): print(r - l + 1) else: print(0)
p03239
s459732737
Accepted
n,t = map(int, input().split()) cl = [] tl = [] for i in range(n): cw,tw = map(int, input().split()) if tw <= t: cl.append(cw) tl.append(tw) if len(cl) == 0: print('TLE') else: print(min(cl))
p02687
s249138134
Accepted
def resolve(): s = input() if s == 'ABC': print('ARC') else: print('ABC') resolve()
p03103
s776889139
Wrong Answer
def resolve(): n, m = map(int, input().split()) l = [list(map(int, input().split())) for _ in range(n)] l.sort() ans = 0 drink = 0 for i in range(n): cost = l[i][0] num = l[i][1] if drink + num >=m: ans += cost*(m-drink) print(ans) else: drink += num ans += num*cost resolve()
p02613
s274602358
Accepted
#!python3 # input N = int(input()) S = [input() for _ in range(N)] def main(): l = ["AC", "WA", "TLE", "RE"] d = {x: 0 for x in l} for s in S: d[s] += 1 for x in l: ans = "{} x {}".format(x, d[x]) print(ans) if __name__ == "__main__": main()
p02623
s611247537
Wrong Answer
n,m,k = map(int,input().split()) a = list(map(int, input().split())) b = list(map(int, input().split())) ac = 0 bc = 0 ans = 0 t = 0 while t<k: if bc<=m-1 and ac <=n-1: if a[ac] > b[bc]: t += b[bc] bc +=1 else: t+= a[ac] ac+=1 elif ac >= n and bc<=m-1: t += b[bc] bc +=1 print(t) elif bc == m and ac<=n-1: t+= a[ac] ac+=1 else: break ans+=1 print(ans)
p02696
s718606858
Accepted
import math A,B,N=map(int,input().split()) if B >N: print(math.floor((A*N)/B)) else: print(math.floor((A*(B-1)/B)))
p02910
s433840131
Accepted
import sys S = input() odd = ['R', 'U', 'D'] even = ['L', 'U', 'D'] for i, j in enumerate(S): if i % 2 == 0: if not j in odd: print('No') sys.exit() else: if not j in even: print('No') sys.exit() print('Yes')
p02759
s731661990
Wrong Answer
n = int(input()) if n % 2 == 0: print(n/2) else: print(n//2+1)
p03827
s458340399
Wrong Answer
N = int(input()) S = list(input()) x = [0] for i in range(N): if S[i] == 'I': x.append(x[-1]+1) print(x) elif S[i] == 'D': x.append(x[-1]-1) print(x) print(max(x))
p02696
s398164374
Accepted
a,b,n=map(int,input().split()) def f(x): return int(a*x//b)-a*int(x//b) if n<b: print(f(n)) elif n==b: print(f(n-1)) elif n>b: t = n u = n - (n%b+1) print(max(f(t),f(u)))
p03416
s350396037
Accepted
a, b = map(int, input().split()) ans = 0 for i in range(a, b+1): s = str(i) if s == s[::-1]: ans += 1 print(ans)
p03779
s566112056
Wrong Answer
X = int(input()) Sum = 0 t = 0 while Sum + (t + 1) <= X: t += 1 Sum += t print(t + (X - Sum))
p03319
s739773060
Accepted
import math N,K,*A=map(int,open(0).read().split()) print(int(math.ceil((N-1)/(K-1))))
p02900
s959062103
Wrong Answer
from math import gcd A, B = map(int, input().split()) d = gcd(A, B) ans = 1 i = 2 while i <= pow(d, 1/2)+1: if d%i == 0: ans += 1 while d%i == 0: d //= i i += 1 print(ans)
p03109
s600077880
Accepted
if int(input()[5:7])<5: print("Heisei") else: print("TBD")
p02596
s603911983
Accepted
k = int(input()) ans = -1 seq = [0] seq.append(7%k) for i in range(2,k+1): seq.append((seq[i-1]*10+7)%k) for j in range(1,k+1): if seq[j] == 0: ans = j break print(ans)
p03862
s124059900
Accepted
N,x = map(int,input().split()) a=list(map(int,input().split())) cnt=0 b=[0]*N #0,2 b[0]=a[0] if a[0]<=x else x cnt+= a[0]-b[0] for i in range(1,N): b[i] = a[i] if b[i-1]+a[i]<=x else max(0,x-b[i-1]) cnt += a[i]-b[i] #print(b) print(cnt)
p03680
s519887724
Wrong Answer
n = int(input()) a = [int(input()) for _ in range(n)] now = a[0] c = 1 if now == 2: print(1) exit() for i in range(n): now = a[now-1] c += 1 if now == 2: print(c) break print(-1)