Buggy python submission (verdict: Time Limit Exceeded):
# -*- coding: utf-8 -*-
import sys
import math
from bisect import bisect_left
from bisect import bisect_right
import collections
import copy
import heapq
from collections import defaultdict
from heapq import heappop, heappush
import random
input = sys.stdin.readline

##### リストの 二分木検索 #####
# bisect_left(lists, 3)
# bisect_right(lists, 3)

##### プライオリティキュー #####
# heapq.heapify(a) #リストaのheap化
# heapq.heappush(a,x) #heap化されたリストaに要素xを追加
# heapq.heappop(a) #heap化されたリストaから最小値を削除＆その最小値を出力

# heapq.heappush(a, -x) #最大値を取り出す時は、pushする時にマイナスにして入れよう
# heapq.heappop(a) * (-1) #取り出す時は、-1を掛けて取り出すこと

##### タプルリストのソート #####
# sorted(ans) #(a, b) -> 1st : aの昇順, 2nd : bの昇順
# sorted(SP, key=lambda x:(x[0],-x[1])) #(a, b) -> 1st : aの昇順, 2nd : bの降順
# sorted(SP, key=lambda x:(-x[0],x[1])) #(a, b) -> 1st : aの降順, 2nd : bの昇順
# sorted(SP, key=lambda x:(-x[0],-x[1])) #(a, b) -> 1st : aの降順, 2nd : bの降順

# sorted(SP, key=lambda x:(x[1])) #(a, b) -> 1st : bの昇順
# sorted(SP, key=lambda x:(-x[1])) #(a, b) -> 1st : bの降順

def main():

	N = int(input())
	#S = list(input())
	#L,R = map(int, input().split(" "))
	#L = list(map(int, input().split(" ")))

	A = input().split()
	A = [int(s) for s in A]

	ans = [0 for _ in range(N)]
	
	ed = min(A[0]*2, A[-1]*2)
	for i in range(ed, -1, -2):
		fin = True
		for j in range(N):
			if j == 0:
				ans[j] = str(i)
				continue
			tmp = (A[j-1] - (int(ans[j-1]) / 2))*2

			if tmp < 0 or tmp % 2 == 1:
				fin = False
				break
			else :
				ans[j] = str(int(tmp))
		
		if fin == False:
			pass
		else:
			if (int(ans[-1]) / 2) + (int(ans[0]) / 2) == A[-1]:
				#print("sss")
				break

	#ans = [str(a) for a in ans]
	print(' '.join(ans))


if __name__ == "__main__":
	main()

Fixed submission:
# -*- coding: utf-8 -*-
import sys
import copy
import collections
from bisect import bisect_left
from bisect import bisect_right
from collections import defaultdict
from heapq import heappop, heappush
import numpy as np
import statistics
from statistics import mean, median,variance,stdev
import math

def main():
	N = int(input())
	A = input().split(" ")
	A = [int(s) for s in A]
	
	tmp = 0
	for i, val in enumerate(A):
		if i == 0:
			tmp += 2*val
			continue
		if i % 2 == 1:
			tmp -= 2*val
		else:
			tmp += 2*val
	
	x = tmp / 2
	
	ans = []
	ans.append(int(x))
	for i, val in enumerate(A):
		tmp = (val - (ans[i]/2)) * 2
		ans.append(int(tmp))
	
	ans = ans[:-1]
	ans = [str(s) for s in ans]
	print(" ".join(ans))
	
if __name__ == "__main__":
	main()

Buggy python submission (verdict: Time Limit Exceeded):
# -*- coding: utf-8 -*-
import sys
import math
from bisect import bisect_left
from bisect import bisect_right
import collections
import copy
import heapq
from collections import defaultdict
from heapq import heappop, heappush
import random
input = sys.stdin.readline

##### リストの 二分木検索 #####
# bisect_left(lists, 3)
# bisect_right(lists, 3)

##### プライオリティキュー #####
# heapq.heapify(a) #リストaのheap化
# heapq.heappush(a,x) #heap化されたリストaに要素xを追加
# heapq.heappop(a) #heap化されたリストaから最小値を削除＆その最小値を出力

# heapq.heappush(a, -x) #最大値を取り出す時は、pushする時にマイナスにして入れよう
# heapq.heappop(a) * (-1) #取り出す時は、-1を掛けて取り出すこと

##### タプルリストのソート #####
# sorted(ans) #(a, b) -> 1st : aの昇順, 2nd : bの昇順
# sorted(SP, key=lambda x:(x[0],-x[1])) #(a, b) -> 1st : aの昇順, 2nd : bの降順
# sorted(SP, key=lambda x:(-x[0],x[1])) #(a, b) -> 1st : aの降順, 2nd : bの昇順
# sorted(SP, key=lambda x:(-x[0],-x[1])) #(a, b) -> 1st : aの降順, 2nd : bの降順

# sorted(SP, key=lambda x:(x[1])) #(a, b) -> 1st : bの昇順
# sorted(SP, key=lambda x:(-x[1])) #(a, b) -> 1st : bの降順

def main():

	N = int(input())
	#S = list(input())
	#L,R = map(int, input().split(" "))
	#L = list(map(int, input().split(" ")))

	A = input().split()
	A = [int(s) for s in A]

	ans = [0 for _ in range(N)]
	
	ed = min(A[0]*2, A[-1]*2)
	s = 0
	if ed > 1000000 * 2:
		s = 100000000
	for i in range(s, ed+1, 2):
		fin = True
		for j in range(N):
			if j == 0:
				ans[j] = i
				continue
			tmp = (A[j-1] - (ans[j-1] / 2))*2

			if tmp < 0 or tmp % 2 == 1:
				fin = False
				break
			else :
				ans[j] = int(tmp)
		
		if fin == False:
			pass
		else:
			if (ans[-1] / 2) + (ans[0] / 2) == A[-1]:
				#print("sss")
				break

	ans = [str(a) for a in ans]
	print(' '.join(ans))


if __name__ == "__main__":
	main()

Fixed submission:
# -*- coding: utf-8 -*-
import sys
import copy
import collections
from bisect import bisect_left
from bisect import bisect_right
from collections import defaultdict
from heapq import heappop, heappush
import numpy as np
import statistics
from statistics import mean, median,variance,stdev
import math

def main():
	N = int(input())
	A = input().split(" ")
	A = [int(s) for s in A]
	
	tmp = 0
	for i, val in enumerate(A):
		if i == 0:
			tmp += 2*val
			continue
		if i % 2 == 1:
			tmp -= 2*val
		else:
			tmp += 2*val
	
	x = tmp / 2
	
	ans = []
	ans.append(int(x))
	for i, val in enumerate(A):
		tmp = (val - (ans[i]/2)) * 2
		ans.append(int(tmp))
	
	ans = ans[:-1]
	ans = [str(s) for s in ans]
	print(" ".join(ans))
	
if __name__ == "__main__":
	main()

Buggy python submission (verdict: Time Limit Exceeded):
# -*- coding: utf-8 -*-
import sys
import math
from bisect import bisect_left
from bisect import bisect_right
import collections
import copy
import heapq
from collections import defaultdict
from heapq import heappop, heappush
import random
input = sys.stdin.readline

##### リストの 二分木検索 #####
# bisect_left(lists, 3)
# bisect_right(lists, 3)

##### プライオリティキュー #####
# heapq.heapify(a) #リストaのheap化
# heapq.heappush(a,x) #heap化されたリストaに要素xを追加
# heapq.heappop(a) #heap化されたリストaから最小値を削除＆その最小値を出力

# heapq.heappush(a, -x) #最大値を取り出す時は、pushする時にマイナスにして入れよう
# heapq.heappop(a) * (-1) #取り出す時は、-1を掛けて取り出すこと

##### タプルリストのソート #####
# sorted(ans) #(a, b) -> 1st : aの昇順, 2nd : bの昇順
# sorted(SP, key=lambda x:(x[0],-x[1])) #(a, b) -> 1st : aの昇順, 2nd : bの降順
# sorted(SP, key=lambda x:(-x[0],x[1])) #(a, b) -> 1st : aの降順, 2nd : bの昇順
# sorted(SP, key=lambda x:(-x[0],-x[1])) #(a, b) -> 1st : aの降順, 2nd : bの降順

# sorted(SP, key=lambda x:(x[1])) #(a, b) -> 1st : bの昇順
# sorted(SP, key=lambda x:(-x[1])) #(a, b) -> 1st : bの降順

def main():

	N = int(input())
	#S = list(input())
	#L,R = map(int, input().split(" "))
	#L = list(map(int, input().split(" ")))

	A = input().split()
	A = [int(s) for s in A]

	ans = [0 for _ in range(N)]
	
	ed = min(A[0]*2, A[-1]*2)
	s = 0
	if ed > 1000000 * 2:
		s = 100000
	for i in range(s, ed+1, 2):
		fin = True
		for j in range(N):
			if j == 0:
				ans[j] = i
				continue
			tmp = (A[j-1] - (ans[j-1] / 2))*2

			if tmp < 0 or tmp % 2 == 1:
				fin = False
				break
			else :
				ans[j] = int(tmp)
		
		if fin == False:
			pass
		else:
			if (ans[-1] / 2) + (ans[0] / 2) == A[-1]:
				#print("sss")
				break

	ans = [str(a) for a in ans]
	print(' '.join(ans))


if __name__ == "__main__":
	main()

Fixed submission:
# -*- coding: utf-8 -*-
import sys
import copy
import collections
from bisect import bisect_left
from bisect import bisect_right
from collections import defaultdict
from heapq import heappop, heappush
import numpy as np
import statistics
from statistics import mean, median,variance,stdev
import math

def main():
	N = int(input())
	A = input().split(" ")
	A = [int(s) for s in A]
	
	tmp = 0
	for i, val in enumerate(A):
		if i == 0:
			tmp += 2*val
			continue
		if i % 2 == 1:
			tmp -= 2*val
		else:
			tmp += 2*val
	
	x = tmp / 2
	
	ans = []
	ans.append(int(x))
	for i, val in enumerate(A):
		tmp = (val - (ans[i]/2)) * 2
		ans.append(int(tmp))
	
	ans = ans[:-1]
	ans = [str(s) for s in ans]
	print(" ".join(ans))
	
if __name__ == "__main__":
	main()

Buggy python submission (verdict: Time Limit Exceeded):
# -*- coding: utf-8 -*-
import sys
import math
from bisect import bisect_left
from bisect import bisect_right
import collections
import copy
import heapq
from collections import defaultdict
from heapq import heappop, heappush
import random
input = sys.stdin.readline

##### リストの 二分木検索 #####
# bisect_left(lists, 3)
# bisect_right(lists, 3)

##### プライオリティキュー #####
# heapq.heapify(a) #リストaのheap化
# heapq.heappush(a,x) #heap化されたリストaに要素xを追加
# heapq.heappop(a) #heap化されたリストaから最小値を削除＆その最小値を出力

# heapq.heappush(a, -x) #最大値を取り出す時は、pushする時にマイナスにして入れよう
# heapq.heappop(a) * (-1) #取り出す時は、-1を掛けて取り出すこと

##### タプルリストのソート #####
# sorted(ans) #(a, b) -> 1st : aの昇順, 2nd : bの昇順
# sorted(SP, key=lambda x:(x[0],-x[1])) #(a, b) -> 1st : aの昇順, 2nd : bの降順
# sorted(SP, key=lambda x:(-x[0],x[1])) #(a, b) -> 1st : aの降順, 2nd : bの昇順
# sorted(SP, key=lambda x:(-x[0],-x[1])) #(a, b) -> 1st : aの降順, 2nd : bの降順

# sorted(SP, key=lambda x:(x[1])) #(a, b) -> 1st : bの昇順
# sorted(SP, key=lambda x:(-x[1])) #(a, b) -> 1st : bの降順

def main():

	N = int(input())
	#S = list(input())
	#L,R = map(int, input().split(" "))
	#L = list(map(int, input().split(" ")))

	A = input().split()
	A = [int(s) for s in A]

	ans = [0 for _ in range(N)]
	
	ed = min(A[0]*2, A[-1]*2)
	s = 0
	if ed > 1000000 * 2:
		s = 100000
	for i in range(s, ed+1, 2):
		fin = True
		for j in range(N):
			if j == 0:
				ans[j] = i
				continue
			tmp = (A[j-1] - (ans[j-1] / 2))*2

			if tmp < 0 or tmp % 2 == 1:
				fin = False
				break
			else :
				ans[j] = int(tmp)
		
		if fin == False:
			pass
		else:
			if (ans[-1] / 2) + (ans[0] / 2) == A[-1]:
				#print("sss")
				break

	ans = [str(a) for a in ans]
	print(' '.join(ans))


if __name__ == "__main__":
	main()

Fixed submission:
# -*- coding: utf-8 -*-
import sys
import copy
import collections
from bisect import bisect_left
from bisect import bisect_right
from collections import defaultdict
from heapq import heappop, heappush
import numpy as np
import statistics
from statistics import mean, median,variance,stdev
import math

def main():
	N = int(input())
	A = input().split(" ")
	A = [int(s) for s in A]
	
	tmp = 0
	for i, val in enumerate(A):
		if i == 0:
			tmp += 2*val
			continue
		if i % 2 == 1:
			tmp -= 2*val
		else:
			tmp += 2*val
	
	x = tmp / 2
	
	ans = []
	ans.append(int(x))
	for i, val in enumerate(A):
		tmp = (val - (ans[i]/2)) * 2
		ans.append(int(tmp))
	
	ans = ans[:-1]
	ans = [str(s) for s in ans]
	print(" ".join(ans))
	
if __name__ == "__main__":
	main()

Buggy python submission (verdict: Time Limit Exceeded):
# -*- coding: utf-8 -*-
import sys
import math
from bisect import bisect_left
from bisect import bisect_right
import collections
import copy
import heapq
from collections import defaultdict
from heapq import heappop, heappush
import random
input = sys.stdin.readline

##### リストの 二分木検索 #####
# bisect_left(lists, 3)
# bisect_right(lists, 3)

##### プライオリティキュー #####
# heapq.heapify(a) #リストaのheap化
# heapq.heappush(a,x) #heap化されたリストaに要素xを追加
# heapq.heappop(a) #heap化されたリストaから最小値を削除＆その最小値を出力

# heapq.heappush(a, -x) #最大値を取り出す時は、pushする時にマイナスにして入れよう
# heapq.heappop(a) * (-1) #取り出す時は、-1を掛けて取り出すこと

##### タプルリストのソート #####
# sorted(ans) #(a, b) -> 1st : aの昇順, 2nd : bの昇順
# sorted(SP, key=lambda x:(x[0],-x[1])) #(a, b) -> 1st : aの昇順, 2nd : bの降順
# sorted(SP, key=lambda x:(-x[0],x[1])) #(a, b) -> 1st : aの降順, 2nd : bの昇順
# sorted(SP, key=lambda x:(-x[0],-x[1])) #(a, b) -> 1st : aの降順, 2nd : bの降順

# sorted(SP, key=lambda x:(x[1])) #(a, b) -> 1st : bの昇順
# sorted(SP, key=lambda x:(-x[1])) #(a, b) -> 1st : bの降順

def main():

	N = int(input())
	#S = list(input())
	#L,R = map(int, input().split(" "))
	#L = list(map(int, input().split(" ")))

	A = input().split()
	A = [int(s) for s in A]

	ans = [0 for _ in range(N)]
	
	ed = min(A[0]*2, A[-1]*2)
	s = 0
	if ed > 1000000 * 2:
		s = 100000
	for i in range(s, ed+1, 2):
		fin = True
		for j in range(N):
			if j == 0:
				ans[j] = i
				continue
			tmp = (A[j-1] - (ans[j-1] / 2))*2

			if tmp < 0 or tmp % 2 == 1:
				fin = False
				break
			else :
				ans[j] = int(tmp)
		
		if fin == False:
			pass
		else:
			if (ans[-1] / 2) + (ans[0] / 2) == A[-1]:
				#print("sss")
				break

	ans = [str(a) for a in ans]
	print(' '.join(ans))


if __name__ == "__main__":
	main()

Fixed submission:
# -*- coding: utf-8 -*-
import sys
import copy
import collections
from bisect import bisect_left
from bisect import bisect_right
from collections import defaultdict
from heapq import heappop, heappush
import numpy as np
import statistics
from statistics import mean, median,variance,stdev
import math

def main():
	N = int(input())
	A = input().split(" ")
	A = [int(s) for s in A]
	
	tmp = 0
	for i, val in enumerate(A):
		if i == 0:
			tmp += 2*val
			continue
		if i % 2 == 1:
			tmp -= 2*val
		else:
			tmp += 2*val
	
	x = tmp / 2
	
	ans = []
	ans.append(int(x))
	for i, val in enumerate(A):
		tmp = (val - (ans[i]/2)) * 2
		ans.append(int(tmp))
	
	ans = ans[:-1]
	ans = [str(s) for s in ans]
	print(" ".join(ans))
	
if __name__ == "__main__":
	main()

Buggy python submission (verdict: Time Limit Exceeded):
# -*- coding: utf-8 -*-
import sys
import math
from bisect import bisect_left
from bisect import bisect_right
import collections
import copy
import heapq
from collections import defaultdict
from heapq import heappop, heappush
import random
input = sys.stdin.readline

##### リストの 二分木検索 #####
# bisect_left(lists, 3)
# bisect_right(lists, 3)

##### プライオリティキュー #####
# heapq.heapify(a) #リストaのheap化
# heapq.heappush(a,x) #heap化されたリストaに要素xを追加
# heapq.heappop(a) #heap化されたリストaから最小値を削除＆その最小値を出力

# heapq.heappush(a, -x) #最大値を取り出す時は、pushする時にマイナスにして入れよう
# heapq.heappop(a) * (-1) #取り出す時は、-1を掛けて取り出すこと

##### タプルリストのソート #####
# sorted(ans) #(a, b) -> 1st : aの昇順, 2nd : bの昇順
# sorted(SP, key=lambda x:(x[0],-x[1])) #(a, b) -> 1st : aの昇順, 2nd : bの降順
# sorted(SP, key=lambda x:(-x[0],x[1])) #(a, b) -> 1st : aの降順, 2nd : bの昇順
# sorted(SP, key=lambda x:(-x[0],-x[1])) #(a, b) -> 1st : aの降順, 2nd : bの降順

# sorted(SP, key=lambda x:(x[1])) #(a, b) -> 1st : bの昇順
# sorted(SP, key=lambda x:(-x[1])) #(a, b) -> 1st : bの降順

def main():

	N = int(input())
	#S = list(input())
	#L,R = map(int, input().split(" "))
	#L = list(map(int, input().split(" ")))

	A = input().split()
	A = [int(s) for s in A]

	ans = [0 for _ in range(N)]
	
	ed = min(A[0]*2, A[-1]*2)
	for i in range(ed, -1, -2):
		fin = True
		for j in range(N):
			if j == 0:
				ans[j] = i
				continue
			tmp = (A[j-1] - (ans[j-1] / 2))*2

			if tmp < 0 or tmp % 2 == 1:
				fin = False
				break
			else :
				ans[j] = int(tmp)
		
		if fin == False:
			pass
		else:
			if (ans[-1] / 2) + (ans[0] / 2) == A[-1]:
				#print("sss")
				break

	ans = [str(a) for a in ans]
	print(' '.join(ans))


if __name__ == "__main__":
	main()

Fixed submission:
# -*- coding: utf-8 -*-
import sys
import copy
import collections
from bisect import bisect_left
from bisect import bisect_right
from collections import defaultdict
from heapq import heappop, heappush
import numpy as np
import statistics
from statistics import mean, median,variance,stdev
import math

def main():
	N = int(input())
	A = input().split(" ")
	A = [int(s) for s in A]
	
	tmp = 0
	for i, val in enumerate(A):
		if i == 0:
			tmp += 2*val
			continue
		if i % 2 == 1:
			tmp -= 2*val
		else:
			tmp += 2*val
	
	x = tmp / 2
	
	ans = []
	ans.append(int(x))
	for i, val in enumerate(A):
		tmp = (val - (ans[i]/2)) * 2
		ans.append(int(tmp))
	
	ans = ans[:-1]
	ans = [str(s) for s in ans]
	print(" ".join(ans))
	
if __name__ == "__main__":
	main()

Buggy python submission (verdict: Time Limit Exceeded):
# -*- coding: utf-8 -*-
import sys
import math
from bisect import bisect_left
from bisect import bisect_right
import collections
import copy
import heapq
from collections import defaultdict
from heapq import heappop, heappush
import random
input = sys.stdin.readline

##### リストの 二分木検索 #####
# bisect_left(lists, 3)
# bisect_right(lists, 3)

##### プライオリティキュー #####
# heapq.heapify(a) #リストaのheap化
# heapq.heappush(a,x) #heap化されたリストaに要素xを追加
# heapq.heappop(a) #heap化されたリストaから最小値を削除＆その最小値を出力

# heapq.heappush(a, -x) #最大値を取り出す時は、pushする時にマイナスにして入れよう
# heapq.heappop(a) * (-1) #取り出す時は、-1を掛けて取り出すこと

##### タプルリストのソート #####
# sorted(ans) #(a, b) -> 1st : aの昇順, 2nd : bの昇順
# sorted(SP, key=lambda x:(x[0],-x[1])) #(a, b) -> 1st : aの昇順, 2nd : bの降順
# sorted(SP, key=lambda x:(-x[0],x[1])) #(a, b) -> 1st : aの降順, 2nd : bの昇順
# sorted(SP, key=lambda x:(-x[0],-x[1])) #(a, b) -> 1st : aの降順, 2nd : bの降順

# sorted(SP, key=lambda x:(x[1])) #(a, b) -> 1st : bの昇順
# sorted(SP, key=lambda x:(-x[1])) #(a, b) -> 1st : bの降順

def main():

	N = int(input())
	#S = list(input())
	#L,R = map(int, input().split(" "))
	#L = list(map(int, input().split(" ")))

	A = input().split()
	A = [int(s) for s in A]

	ans = [0 for _ in range(N)]
	
	ed = min(A[0]*2, A[-1]*2)
	for i in range(0, ed+1, 2):
		fin = True
		for j in range(N):
			if j == 0:
				ans[j] = i
				continue
			tmp = (A[j-1] - (ans[j-1] / 2))*2

			if tmp < 0 or tmp % 2 == 1:
				fin = False
				break
			else :
				ans[j] = int(tmp)
		
		if fin == False:
			pass
		else:
			if (ans[-1] / 2) + (ans[0] / 2) == A[-1]:
				#print("sss")
				break

	ans = [str(a) for a in ans]
	print(' '.join(ans))




if __name__ == "__main__":
	main()

Fixed submission:
# -*- coding: utf-8 -*-
import sys
import copy
import collections
from bisect import bisect_left
from bisect import bisect_right
from collections import defaultdict
from heapq import heappop, heappush
import numpy as np
import statistics
from statistics import mean, median,variance,stdev
import math

def main():
	N = int(input())
	A = input().split(" ")
	A = [int(s) for s in A]
	
	tmp = 0
	for i, val in enumerate(A):
		if i == 0:
			tmp += 2*val
			continue
		if i % 2 == 1:
			tmp -= 2*val
		else:
			tmp += 2*val
	
	x = tmp / 2
	
	ans = []
	ans.append(int(x))
	for i, val in enumerate(A):
		tmp = (val - (ans[i]/2)) * 2
		ans.append(int(tmp))
	
	ans = ans[:-1]
	ans = [str(s) for s in ans]
	print(" ".join(ans))
	
if __name__ == "__main__":
	main()