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- #!/usr/bin/env python3
- import sys
- def escape(maze, decrease):
- vis = [0] * len(maze)
- steps = 0
- pos = 0
- while 0 <= pos < len(maze):
- jump = maze[pos] + vis[pos]
- vis[pos] += -1 if decrease and jump >= 3 else 1
- pos += jump
- steps += 1
- return steps
- maze = list(map(int, sys.stdin))
- print(escape(maze, False))
- print(escape(maze, True))
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