2.2.1 混乱脚本示例(bad_spider.py)
When Chávez became Venezuela's president in 1999, oil prices were climbing. In the early 2010s, a barrel would often fetch about $100, providing the government with plenty of money to pour into social programmes. But with current prices around the $65 mark, the country looks less like a reasonable investment.
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if (arr[i-1] arr[i]) return 0;