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import numpy as np
import numpy.typing as npt
AR_i: npt.NDArray[np.int64]
AR_f: npt.NDArray[np.float64]
AR_m: npt.NDArray[np.timedelta64]
AR_U: npt.NDArray[np.str_]
np.einsum("i,i->i", AR_i, AR_m) # type: ignore[arg-type]
np.einsum("i,i->i", AR_f, AR_f, dtype=np.int32) # type: ignore[arg-type]
np.einsum("i,i->i", AR_i, AR_i, out=AR_U) # type: ignore[type-var]
np.einsum("i,i->i", AR_i, AR_i, out=AR_U, casting="unsafe") # type: ignore[call-overload]
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