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2505.py
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2505.py
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import copy
def swap(gameboard,pivotStart,pivotEnd):
for i in range(0, int((pivotEnd - pivotStart + 1) // 2)):
temp = gameboard[pivotStart+i]
gameboard[pivotStart+i] = gameboard[pivotEnd-i]
gameboard[pivotEnd-i] = temp
return gameboard
def findFront(gameboard):
pivotStart = 1
pivotEnd = 1
start = False
for i in range(1, len(gameboard)):
if gameboard[i] != i and start == False:
pivotStart = i
start = True
if i > 1 and gameboard[i] == pivotStart:
pivotEnd = i
break
return pivotStart,pivotEnd
def findBack(gameboard):
pivotStart = 1
pivotEnd = 1
start = False
for i in range(len(gameboard) - 1, -1, -1):
if gameboard[i] != i and start == False:
pivotEnd = i
start = True
if i < len(gameboard)-1 and gameboard[i] == pivotEnd :
pivotStart = i
break
return pivotStart,pivotEnd
N = int(input())
gameboard_original = [0]+list(map(int,input().split()))
gameboard = copy.deepcopy(gameboard_original)
pivotstart_1 = 1
pivotstart_2 = 1
pivotend_1 = 1
pivotend_2 = 1
pivotstart_1, pivotend_1 = findFront(gameboard)
swap(gameboard,pivotstart_1,pivotend_1)
pivotstart_2, pivotend_2 = findFront(gameboard)
swap(gameboard,pivotstart_2,pivotend_2)
error = False
for i in range(1,len(gameboard)):
if gameboard[i] != i:
error = True
if error == False:
print(pivotstart_1, pivotend_1)
print(pivotstart_2, pivotend_2)
else:
gameboard = copy.deepcopy(gameboard_original)
pivotstart_1 = 1
pivotstart_2 = 1
pivotend_1 = 1
pivotend_2 = 1
pivotstart_1, pivotend_1 = findBack(gameboard)
swap(gameboard, pivotstart_1, pivotend_1)
pivotstart_2, pivotend_2 = findBack(gameboard)
swap(gameboard, pivotstart_2, pivotend_2)
print(pivotstart_1, pivotend_1)
print(pivotstart_2, pivotend_2)