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Provide a correct Python 3 solution for this coding contest problem. There are N integers, A_1, A_2, ..., A_N, arranged in a row in this order. You can perform the following operation on this integer sequence any number of times: Operation: Choose an integer i satisfying 1 \leq i \leq N-1. Multiply both A_i and A_{i...
instruction
0
75,693
5
151,386
"Correct Solution: ``` N,*A=map(int,open(0).read().split()) x,y=0,-1e10 for a in A:x,y=max(x+a,y-a),max(x-a,y+a) print(x) ```
output
1
75,693
5
151,387
Provide a correct Python 3 solution for this coding contest problem. There are N integers, A_1, A_2, ..., A_N, arranged in a row in this order. You can perform the following operation on this integer sequence any number of times: Operation: Choose an integer i satisfying 1 \leq i \leq N-1. Multiply both A_i and A_{i...
instruction
0
75,694
5
151,388
"Correct Solution: ``` n = int(input()) a = list(map(int, input().split())) ab = list(map(abs, a[:])) s = sum(ab[:]) m = len([i for i in a if i < 0]) if m % 2 == 0: print(s) else: print(s - 2 * min(ab)) ```
output
1
75,694
5
151,389
Provide a correct Python 3 solution for this coding contest problem. There are N integers, A_1, A_2, ..., A_N, arranged in a row in this order. You can perform the following operation on this integer sequence any number of times: Operation: Choose an integer i satisfying 1 \leq i \leq N-1. Multiply both A_i and A_{i...
instruction
0
75,695
5
151,390
"Correct Solution: ``` n = int(input()) a = list(map(int, input().split())) p = sum(ai < 0 for ai in a) ans = sum(map(abs, a)) if p & 1: ans -= 2 * min(abs(ai) for ai in a) print(ans) ```
output
1
75,695
5
151,391
Provide a correct Python 3 solution for this coding contest problem. There are N integers, A_1, A_2, ..., A_N, arranged in a row in this order. You can perform the following operation on this integer sequence any number of times: Operation: Choose an integer i satisfying 1 \leq i \leq N-1. Multiply both A_i and A_{i...
instruction
0
75,696
5
151,392
"Correct Solution: ``` n = int(input()) A = list(map(int,input().split())) B = [abs(a) for a in A] ans=sum(B) c=sum(1 for a in A if a<0) if c%2 : ans-=min(B)*2 print(ans) ```
output
1
75,696
5
151,393
Provide a correct Python 3 solution for this coding contest problem. There are N integers, A_1, A_2, ..., A_N, arranged in a row in this order. You can perform the following operation on this integer sequence any number of times: Operation: Choose an integer i satisfying 1 \leq i \leq N-1. Multiply both A_i and A_{i...
instruction
0
75,697
5
151,394
"Correct Solution: ``` n = int(input()) a = list(map(int, input().split())) b = [abs(i) for i in a] if sum([i <= 0 for i in a]) % 2 == 0: print(sum(b)) else: print(sum(b) - min(b) * 2) ```
output
1
75,697
5
151,395
Provide a correct Python 3 solution for this coding contest problem. There are N integers, A_1, A_2, ..., A_N, arranged in a row in this order. You can perform the following operation on this integer sequence any number of times: Operation: Choose an integer i satisfying 1 \leq i \leq N-1. Multiply both A_i and A_{i...
instruction
0
75,698
5
151,396
"Correct Solution: ``` n=input() a=list(map(int,input().split())) n=sum(x<0 for x in a) a=list(map(lambda x: abs(x),a)) m=min(a) s=sum(a) if n%2==0 else sum(a)-m *2 print(s) ```
output
1
75,698
5
151,397
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. There are N integers, A_1, A_2, ..., A_N, arranged in a row in this order. You can perform the following operation on this integer sequence any number of times: Operation: Choose an integer i ...
instruction
0
75,699
5
151,398
Yes
output
1
75,699
5
151,399
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. There are N integers, A_1, A_2, ..., A_N, arranged in a row in this order. You can perform the following operation on this integer sequence any number of times: Operation: Choose an integer i ...
instruction
0
75,700
5
151,400
Yes
output
1
75,700
5
151,401
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. There are N integers, A_1, A_2, ..., A_N, arranged in a row in this order. You can perform the following operation on this integer sequence any number of times: Operation: Choose an integer i ...
instruction
0
75,701
5
151,402
Yes
output
1
75,701
5
151,403
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. There are N integers, A_1, A_2, ..., A_N, arranged in a row in this order. You can perform the following operation on this integer sequence any number of times: Operation: Choose an integer i ...
instruction
0
75,702
5
151,404
Yes
output
1
75,702
5
151,405
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. There are N integers, A_1, A_2, ..., A_N, arranged in a row in this order. You can perform the following operation on this integer sequence any number of times: Operation: Choose an integer i ...
instruction
0
75,703
5
151,406
No
output
1
75,703
5
151,407
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. There are N integers, A_1, A_2, ..., A_N, arranged in a row in this order. You can perform the following operation on this integer sequence any number of times: Operation: Choose an integer i ...
instruction
0
75,704
5
151,408
No
output
1
75,704
5
151,409
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. There are N integers, A_1, A_2, ..., A_N, arranged in a row in this order. You can perform the following operation on this integer sequence any number of times: Operation: Choose an integer i ...
instruction
0
75,705
5
151,410
No
output
1
75,705
5
151,411
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. There are N integers, A_1, A_2, ..., A_N, arranged in a row in this order. You can perform the following operation on this integer sequence any number of times: Operation: Choose an integer i ...
instruction
0
75,706
5
151,412
No
output
1
75,706
5
151,413
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. In some other world, today is December D-th. Write a program that prints `Christmas` if D = 25, `Christmas Eve` if D = 24, `Christmas Eve Eve` if D = 23 and `Christmas Eve Eve Eve` if D = 22. ...
instruction
0
75,719
5
151,438
No
output
1
75,719
5
151,439
Provide a correct Python 3 solution for this coding contest problem. You are given an integer sequence of length n, a_1, ..., a_n. Let us consider performing the following n operations on an empty sequence b. The i-th operation is as follows: 1. Append a_i to the end of b. 2. Reverse the order of the elements in b. ...
instruction
0
75,739
5
151,478
"Correct Solution: ``` n = int(input()) a = list(map(int, input().split())) b_1 = [] b_2 = [] b = [] for i in reversed(range(len(a))): if i % 2 != 0: b_1.append(a[i]) else: b_2.append(a[i]) if len(a) % 2 == 0: b_2.reverse() b.extend(b_1) b.extend(b_2) else: b_1.reverse() b.extend(b_2) b.extend(b_1) for b_nu...
output
1
75,739
5
151,479
Provide a correct Python 3 solution for this coding contest problem. You are given an integer sequence of length n, a_1, ..., a_n. Let us consider performing the following n operations on an empty sequence b. The i-th operation is as follows: 1. Append a_i to the end of b. 2. Reverse the order of the elements in b. ...
instruction
0
75,740
5
151,480
"Correct Solution: ``` from collections import deque n=int(input()) a=list(map(str,input().split())) d=deque() for i in range(n): if i%2==0: d.appendleft(a[i]) else: d.append(a[i]) d=list(d) if n%2==0: d=d[::-1] print(" ".join(d)) ```
output
1
75,740
5
151,481
Provide a correct Python 3 solution for this coding contest problem. You are given an integer sequence of length n, a_1, ..., a_n. Let us consider performing the following n operations on an empty sequence b. The i-th operation is as follows: 1. Append a_i to the end of b. 2. Reverse the order of the elements in b. ...
instruction
0
75,741
5
151,482
"Correct Solution: ``` N=int(input()) A=list(map(int,input().split())) B=[] C=[] for i in range(N): if(N%2==0): if(i%2==0): B.append(A[i]) else: C.append(A[i]) else: if(i%2==0): C.append(A[i]) else: B.append(A[i]) C.reverse() for...
output
1
75,741
5
151,483
Provide a correct Python 3 solution for this coding contest problem. You are given an integer sequence of length n, a_1, ..., a_n. Let us consider performing the following n operations on an empty sequence b. The i-th operation is as follows: 1. Append a_i to the end of b. 2. Reverse the order of the elements in b. ...
instruction
0
75,742
5
151,484
"Correct Solution: ``` n = int(input()) a = list(map(int,input().split())) if n % 2 == 1: b = a[::2] c = a[1::2] b.reverse() d = b+c print(' '.join(map(str,d))) else: b = a[::2] c = a[1::2] c.reverse() d = c+b print(' '.join(map(str,d))) ```
output
1
75,742
5
151,485
Provide a correct Python 3 solution for this coding contest problem. You are given an integer sequence of length n, a_1, ..., a_n. Let us consider performing the following n operations on an empty sequence b. The i-th operation is as follows: 1. Append a_i to the end of b. 2. Reverse the order of the elements in b. ...
instruction
0
75,743
5
151,486
"Correct Solution: ``` n=int(input()) a=list(map(int,input().split())) ans=[] v=[] ans=a[-1::-2] if n%2==0: for i in range(0,n,2): v.append(a[i]) else: for i in range(1,n,2): v.append(a[i]) ans.extend(v) moji=" ".join(map(str,ans)) print(moji) ```
output
1
75,743
5
151,487
Provide a correct Python 3 solution for this coding contest problem. You are given an integer sequence of length n, a_1, ..., a_n. Let us consider performing the following n operations on an empty sequence b. The i-th operation is as follows: 1. Append a_i to the end of b. 2. Reverse the order of the elements in b. ...
instruction
0
75,744
5
151,488
"Correct Solution: ``` def slove(): import sys input = sys.stdin.readline n = int(input().rstrip('\n')) a = list(map(int, input().rstrip('\n').split())) ls = [] for i in range(n-1, -1, -2): ls.append(a[i]) for i in range(0 if n % 2 == 0 else 1, n, 2): ls.append(a[i]) prin...
output
1
75,744
5
151,489
Provide a correct Python 3 solution for this coding contest problem. You are given an integer sequence of length n, a_1, ..., a_n. Let us consider performing the following n operations on an empty sequence b. The i-th operation is as follows: 1. Append a_i to the end of b. 2. Reverse the order of the elements in b. ...
instruction
0
75,745
5
151,490
"Correct Solution: ``` n = int(input()) a = list(map(int,input().split())) even = [] odd = [] for i in range(0,n): if i % 2 == 0: odd.append(a[i]) else: even.append(a[i]) res = [] if n % 2 == 0: even = reversed(even) res.extend(even) res.extend(odd) else: odd = reversed(odd) res.extend(odd) res.extend(eve...
output
1
75,745
5
151,491
Provide a correct Python 3 solution for this coding contest problem. You are given an integer sequence of length n, a_1, ..., a_n. Let us consider performing the following n operations on an empty sequence b. The i-th operation is as follows: 1. Append a_i to the end of b. 2. Reverse the order of the elements in b. ...
instruction
0
75,746
5
151,492
"Correct Solution: ``` from collections import deque n = int(input()) a = list(input().split()) b = deque() for i in range(n): if i % 2 == 0: b.append(a[i]) else: b.appendleft(a[i]) if n % 2 == 1: b.reverse() print(' '.join(b)) ```
output
1
75,746
5
151,493
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given an integer sequence of length n, a_1, ..., a_n. Let us consider performing the following n operations on an empty sequence b. The i-th operation is as follows: 1. Append a_i to t...
instruction
0
75,747
5
151,494
Yes
output
1
75,747
5
151,495
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given an integer sequence of length n, a_1, ..., a_n. Let us consider performing the following n operations on an empty sequence b. The i-th operation is as follows: 1. Append a_i to t...
instruction
0
75,748
5
151,496
Yes
output
1
75,748
5
151,497
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given an integer sequence of length n, a_1, ..., a_n. Let us consider performing the following n operations on an empty sequence b. The i-th operation is as follows: 1. Append a_i to t...
instruction
0
75,749
5
151,498
Yes
output
1
75,749
5
151,499
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given an integer sequence of length n, a_1, ..., a_n. Let us consider performing the following n operations on an empty sequence b. The i-th operation is as follows: 1. Append a_i to t...
instruction
0
75,750
5
151,500
Yes
output
1
75,750
5
151,501
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given an integer sequence of length n, a_1, ..., a_n. Let us consider performing the following n operations on an empty sequence b. The i-th operation is as follows: 1. Append a_i to t...
instruction
0
75,751
5
151,502
No
output
1
75,751
5
151,503
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given an integer sequence of length n, a_1, ..., a_n. Let us consider performing the following n operations on an empty sequence b. The i-th operation is as follows: 1. Append a_i to t...
instruction
0
75,752
5
151,504
No
output
1
75,752
5
151,505
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given an integer sequence of length n, a_1, ..., a_n. Let us consider performing the following n operations on an empty sequence b. The i-th operation is as follows: 1. Append a_i to t...
instruction
0
75,753
5
151,506
No
output
1
75,753
5
151,507
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given an integer sequence of length n, a_1, ..., a_n. Let us consider performing the following n operations on an empty sequence b. The i-th operation is as follows: 1. Append a_i to t...
instruction
0
75,754
5
151,508
No
output
1
75,754
5
151,509
Provide a correct Python 3 solution for this coding contest problem. For a set $S$ of integers, perform a sequence of the following operations. Note that each value in $S$ must be unique. * insert($x$): Insert $x$ to $S$ and report the number of elements in $S$ after the operation. * find($x$): Report the number of $...
instruction
0
75,874
5
151,748
"Correct Solution: ``` q = int(input()) S = set([]) for i in range(q): query, x = list(map(int, input().split())) # insert if query == 0: S.add(x) print(len(S)) # find elif query == 1: if x in S: print(1) else: print(0) # delete els...
output
1
75,874
5
151,749
Provide a correct Python 3 solution for this coding contest problem. For a set $S$ of integers, perform a sequence of the following operations. Note that each value in $S$ must be unique. * insert($x$): Insert $x$ to $S$ and report the number of elements in $S$ after the operation. * find($x$): Report the number of $...
instruction
0
75,875
5
151,750
"Correct Solution: ``` if __name__ == '__main__': n = int(input()) S = set() for _ in range(n): x,y = map(int,input().split()) if x == 0: S.add(y) print(len(S)) elif x == 1: if y in S: print("1") else: print("0") else: S.discard(y) ```
output
1
75,875
5
151,751
Provide a correct Python 3 solution for this coding contest problem. For a set $S$ of integers, perform a sequence of the following operations. Note that each value in $S$ must be unique. * insert($x$): Insert $x$ to $S$ and report the number of elements in $S$ after the operation. * find($x$): Report the number of $...
instruction
0
75,876
5
151,752
"Correct Solution: ``` s = set() for _ in range(int(input())): q,x = map(int, input().split()) if q==0: s.add(x) print(len(s)) elif q==2: s.discard(x) else: print("1" if x in s else "0") ```
output
1
75,876
5
151,753
Provide a correct Python 3 solution for this coding contest problem. For a set $S$ of integers, perform a sequence of the following operations. Note that each value in $S$ must be unique. * insert($x$): Insert $x$ to $S$ and report the number of elements in $S$ after the operation. * find($x$): Report the number of $...
instruction
0
75,877
5
151,754
"Correct Solution: ``` from typing import Set if __name__ == "__main__": int_set: Set[int] = set() num_query = int(input()) for _ in range(num_query): op, v = map(lambda x: int(x), input().split()) if (0 == op): int_set.add(v) print(len(int_set)) elif (1 ==...
output
1
75,877
5
151,755
Provide a correct Python 3 solution for this coding contest problem. For a set $S$ of integers, perform a sequence of the following operations. Note that each value in $S$ must be unique. * insert($x$): Insert $x$ to $S$ and report the number of elements in $S$ after the operation. * find($x$): Report the number of $...
instruction
0
75,878
5
151,756
"Correct Solution: ``` readline = open(0).readline writelines = open(1, 'w').writelines s = set() def insert(x): s.add(x) ans.append("%d\n" % len(s)) def find(x): ans.append("%d\n" % (x in s)) C = [insert, find, s.discard].__getitem__ Q = int(readline()) ans = [] for _ in range(Q): t, x = map(int, rea...
output
1
75,878
5
151,757
Provide a correct Python 3 solution for this coding contest problem. For a set $S$ of integers, perform a sequence of the following operations. Note that each value in $S$ must be unique. * insert($x$): Insert $x$ to $S$ and report the number of elements in $S$ after the operation. * find($x$): Report the number of $...
instruction
0
75,879
5
151,758
"Correct Solution: ``` q = int(input()) se = set() while q: q -= 1 op, x = map(int, input().split()) if op == 1: print(+(x in se)) elif op == 0: se.add(x) print(len(se)) else: se.discard(x) ```
output
1
75,879
5
151,759
Provide a correct Python 3 solution for this coding contest problem. For a set $S$ of integers, perform a sequence of the following operations. Note that each value in $S$ must be unique. * insert($x$): Insert $x$ to $S$ and report the number of elements in $S$ after the operation. * find($x$): Report the number of $...
instruction
0
75,880
5
151,760
"Correct Solution: ``` def main(): m = int(input()) s = set() for _ in range(m): a,b = map(int,input().split()) if a == 0: s.add(b) print (len(s)) elif a == 1: if b in s:print (1) else :print (0) elif b in s:s.remove(b) if...
output
1
75,880
5
151,761
Provide a correct Python 3 solution for this coding contest problem. For a set $S$ of integers, perform a sequence of the following operations. Note that each value in $S$ must be unique. * insert($x$): Insert $x$ to $S$ and report the number of elements in $S$ after the operation. * find($x$): Report the number of $...
instruction
0
75,881
5
151,762
"Correct Solution: ``` readline = open(0).readline writeline = open(1, 'w').writelines s = set() def insert(x): s.add(x) ans.append("%d\n" % len(s)) def find(x): ans.append("%d\n" % (x in s)) C = [insert, find, s.discard].__getitem__ Q = int(readline()) ans = [] for _ in range(Q): t, x = map(int...
output
1
75,881
5
151,763
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. For a set $S$ of integers, perform a sequence of the following operations. Note that each value in $S$ must be unique. * insert($x$): Insert $x$ to $S$ and report the number of elements in $S$ ...
instruction
0
75,882
5
151,764
Yes
output
1
75,882
5
151,765
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. For a set $S$ of integers, perform a sequence of the following operations. Note that each value in $S$ must be unique. * insert($x$): Insert $x$ to $S$ and report the number of elements in $S$ ...
instruction
0
75,883
5
151,766
Yes
output
1
75,883
5
151,767
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. For a set $S$ of integers, perform a sequence of the following operations. Note that each value in $S$ must be unique. * insert($x$): Insert $x$ to $S$ and report the number of elements in $S$ ...
instruction
0
75,884
5
151,768
Yes
output
1
75,884
5
151,769
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. For a set $S$ of integers, perform a sequence of the following operations. Note that each value in $S$ must be unique. * insert($x$): Insert $x$ to $S$ and report the number of elements in $S$ ...
instruction
0
75,885
5
151,770
Yes
output
1
75,885
5
151,771
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. For a set $S$ of integers, perform a sequence of the following operations. Note that each value in $S$ must be unique. * insert($x$): Insert $x$ to $S$ and report the number of elements in $S$ ...
instruction
0
75,886
5
151,772
No
output
1
75,886
5
151,773
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. For a set $S$ of integers, perform a sequence of the following operations. Note that each value in $S$ must be unique. * insert($x$): Insert $x$ to $S$ and report the number of elements in $S$ ...
instruction
0
75,887
5
151,774
No
output
1
75,887
5
151,775
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. For a set $S$ of integers, perform a sequence of the following operations. Note that each value in $S$ must be unique. * insert($x$): Insert $x$ to $S$ and report the number of elements in $S$ ...
instruction
0
75,888
5
151,776
No
output
1
75,888
5
151,777
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. For a set $S$ of integers, perform a sequence of the following operations. Note that each value in $S$ must be unique. * insert($x$): Insert $x$ to $S$ and report the number of elements in $S$ ...
instruction
0
75,889
5
151,778
No
output
1
75,889
5
151,779
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given two integers n and m. Calculate the number of pairs of arrays (a, b) such that: * the length of both arrays is equal to m; * each element of each array is an integer between ...
instruction
0
75,999
5
151,998
Yes
output
1
75,999
5
151,999
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Jeff got 2n real numbers a1, a2, ..., a2n as a birthday present. The boy hates non-integer numbers, so he decided to slightly "adjust" the numbers he's got. Namely, Jeff consecutively executes n...
instruction
0
76,197
5
152,394
No
output
1
76,197
5
152,395
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Jeff got 2n real numbers a1, a2, ..., a2n as a birthday present. The boy hates non-integer numbers, so he decided to slightly "adjust" the numbers he's got. Namely, Jeff consecutively executes n...
instruction
0
76,198
5
152,396
No
output
1
76,198
5
152,397