{
  "task": {
    "id": "case_103",
    "name": "swap_consecutive",
    "summary": "Swap consecutive numbers in a list.",
    "examples": [
      {
        "input": [
          "BOS",
          2,
          4,
          2,
          6,
          4,
          8,
          6,
          1,
          3
        ],
        "output": [
          "BOS",
          4.0,
          2.0,
          6.0,
          2.0,
          8.0,
          4.0,
          1.0,
          6.0,
          3.0
        ]
      },
      {
        "input": [
          "BOS",
          4,
          1,
          7,
          5,
          1,
          4,
          0,
          9,
          5
        ],
        "output": [
          "BOS",
          1.0,
          4.0,
          5.0,
          7.0,
          4.0,
          1.0,
          9.0,
          0.0,
          5.0
        ]
      },
      {
        "input": [
          "BOS",
          10,
          10,
          7,
          4,
          3,
          7,
          7,
          2,
          5
        ],
        "output": [
          "BOS",
          10.0,
          10.0,
          4.0,
          7.0,
          7.0,
          3.0,
          2.0,
          7.0,
          5.0
        ]
      },
      {
        "input": [
          "BOS",
          8,
          0,
          10,
          10,
          9,
          2,
          6,
          3,
          8
        ],
        "output": [
          "BOS",
          0.0,
          8.0,
          10.0,
          10.0,
          2.0,
          9.0,
          3.0,
          6.0,
          8.0
        ]
      },
      {
        "input": [
          "BOS",
          6,
          3,
          10,
          7,
          4,
          6,
          9,
          2,
          6
        ],
        "output": [
          "BOS",
          3.0,
          6.0,
          7.0,
          10.0,
          6.0,
          4.0,
          2.0,
          9.0,
          6.0
        ]
      }
    ],
    "is_categorical": true
  },
  "program": "len = rasp.SelectorWidth(rasp.Select(rasp.indices, rasp.indices, rasp.Comparison.TRUE)).named('len')\nswaper = rasp.SequenceMap(lambda idx, L: idx if (idx == L - 1 and idx % 2 == 0) else (idx + 1 if idx % 2 == 0 else idx - 1), rasp.indices, len).named('swaper')\nswap_selector = rasp.Select(rasp.indices, swaper, rasp.Comparison.EQ).named('swap_selector')\nswapped = rasp.Aggregate(swap_selector, rasp.tokens).named('swapped')\nreturn swapped",
  "components": [
    {
      "id": "L0H0_ATTN",
      "hook": "blocks.0.attn.hook_result[0]",
      "role": {
        "tag": "AGGREGATOR",
        "note": "Produces a shared sequence-level size signal used to handle the last element correctly during swapping."
      },
      "rasp_vars": [
        "len"
      ],
      "labels": [
        "selector_width_4_selector_width_attn_output"
      ]
    },
    {
      "id": "L0_MLP",
      "hook": "blocks.0.mlp.hook_post",
      "role": {
        "tag": "MAPPER",
        "note": "Turns the length-related signal into a sequence-length feature."
      },
      "rasp_vars": [
        "len"
      ],
      "labels": [
        "selector_width_4_selector_width_attn_output",
        "selector_width_4"
      ]
    },
    {
      "id": "L1_MLP",
      "hook": "blocks.1.mlp.hook_post",
      "role": {
        "tag": "COMBINER",
        "note": "For each position, computes the index of the element it should swap with (neighbor, with end-of-sequence handling)."
      },
      "rasp_vars": [
        "swaper"
      ],
      "labels": [
        "sequence_map_3"
      ]
    },
    {
      "id": "L2H0_ATTN",
      "hook": "blocks.2.attn.hook_result[0]",
      "role": {
        "tag": "ROUTER",
        "note": "Moves values so each position receives the value from its swap partner."
      },
      "rasp_vars": [
        "swapped"
      ],
      "labels": [
        "aggregate_1"
      ]
    }
  ]
}