import java.lang.Integer;
import java.lang.Object;
import java.lang.Float;

record Rec(Integer a, Object b) {}

public class Switch {
    Integer main(Object o) {
        return switch (o) {
        case Rec(Integer a, Integer b) -> { yield a + b; }
        case Rec(Integer a, Float b) -> { yield a + 10; }
        case Rec(Integer a, Rec(Integer b, Integer c)) -> { yield a + b + c; }
        case Integer i -> { yield i; }
        default -> { yield 0; }
        };
    }
}