stack.pop(); // 弹出的索引对应的值≤当前身高，无遮挡，能看到
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Cuba’s interior ministry said the group comprised anti-government Cubans, some of whom were previously wanted for plotting attacks. They came from the US dressed in camouflage and armed with assault rifles, handguns, homemade explosives, ballistic vests and telescopic sights, it said.
Author(s): Yoshiyasu Takefuji