#!/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))