12 lines
275 B
Python
12 lines
275 B
Python
|
import sys
|
||
|
|
|
||
|
|
L = [list(map(int,l.split(' '))) for l in sys.stdin.read().splitlines()]
|
||
|
|
|
||
|
|
def extrapolate(L):
|
||
|
|
if all(not a for a in L):
|
||
|
|
return [0]+L
|
||
|
|
M = [b-a for a,b in zip(L,L[1:])]
|
||
|
|
return [L[0]-extrapolate(M)[0]]+L
|
||
|
|
|
||
|
|
print(sum(extrapolate(l)[0] for l in L))
|