import java.util.*;
public class Main {
List l1, l2, l3, l4, l5, l6, l7, l8
;
Main() {
}
public static void main
(String[] args
){ new Main();
}
return ((List) o
).
stream().
filter(i
-> i
instanceof Integer).
mapToInt(i
-> (Integer) i
).
sum(); }));
return l;
}
{
))
));
))
));
));
)),
))
));
)),
))
));
}
}
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[1, 2, 3]
[1, 2, 3, 6, 8, 9]
[[1], [2], 3, 4]
[[[1]], [2], 3, 4]
[[1, 2, [8, 9]], 5]
[3, [1, 2], [1, 2]]
[3, [1, 2, [99]], [1, 2, [34]]]
[[1, [9, 12]], 2, 7, [2, 3, [1, 2], 4]]