[2026春季][T1-1-9] DiFanrui#89
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…, fractional_max_pool2d/3d
All five operators implemented with NineToothed kernels:
- frac: element_wise arrangement with where/floor/ceil for trunc
- scatter_add: vectorized ntl.atomic_add scatter
- multilabel_margin_loss: O(C^2) offsets-based + reduce_sum kernel
- fractional_max_pool2d/3d: output-driven vectorized with tail mask
and NaN semantics matching PyTorch 2.12
31 tests pass, covering batched/unbatched, return_indices, NaN,
output_size=1, output_ratio, negative dim, repeated destination,
and >128 element cases.
Co-Authored-By: Claude <noreply@anthropic.com>
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实现 T1-1-9 赛题的 5 个算子：
scatter_add、multilabel_margin_loss、frac、fractional_max_pool2d、fractional_max_pool3d。测试结果
全仓库: 871 passed, 0 failed, 88 skipped
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