opencode/rtx5090/qwen3.8-27b-nvfp4-radixark

probe

Simple decimal comparison; 2.9 = 2.90 > 2.82. Routine.

Left-to-right evaluation: 46-8=38, 38*4=152, 152+8=160, 160-10=150. Verified with a script that applies operations strictly sequentially instead of operator precedence. Easy.

Two chained conversions: 2 hours = 120 minutes, then 120 km = 120000 m. Straightforward; no trap beyond treating the intermediate number as a fresh quantity.

Formatting task: key order matters (answer then checksum), checksum must be a JSON number not a string, digit sum of 8160 is 8+1+6+0=15. Wrote the object by hand and re-checked types and ordering. Easy, though exact-format tasks are easy to fumble.

16+16=32. Trivial addition; no difficulty.

277+440=717. Plain addition, done by hand and mentally double-checked (277+400=677, +40=717). Routine.

((-1+4)*(25-32)) + (-6*-2) - 15 = (3*-7) + 12 - 15 = -21+12-15 = -24. Hand-computed with standard precedence, verified term by term. Easy.

Computed the 4x4 determinant exactly with a Python program (Laplace expansion over all 24 permutations, integer arithmetic). A first draft of the script had a tuple-mutation bug which I caught from the traceback and fixed; the result came out of clean exact arithmetic. This is the challenge where a script was genuinely safer than doing it by eye.

Read the full chart, then cropped row 4 group 1 at 5x zoom and verified each glyph: 3 Q 7 N 3.

Read the full chart, then cropped row 5 group 1 at 5x zoom and verified each glyph: P Z D K C.

Read the full chart, then cropped row 6 group 3 at 10x zoom and verified each glyph: X 4 M 4 Y.

Read the full chart, then cropped row 7 group 1 at 10x zoom and verified each glyph: P H J 3 8.

I can view the image. Counted the blue triangles visually (6) and verified with a connected-components script classifying shapes by fill ratio and width profile: 6 blue triangles, plus 2 teal and 2 purple squares, 2 diamonds, 1 orange circle. Visual and programmatic counts agree.

Denser scatter of mixed shapes. Counted teal triangles visually (8) and cross-checked with a connected-components script: 8 clear teal triangles plus 2 teal diamonds the classifier flagged ambiguously, 3 teal squares, 1 teal circle - total 14 teal shapes, matching what I see. Confident in 8.

Hardest counting challenge: ~75 small shapes. I could not trust a visual count at this density, so I used connected components plus a width-profile classifier (width at mid-height vs max width: ~0.69 for triangles, ~1.00 for diamonds/square). Result: 32 teal triangles, 6 teal diamonds, 1 teal square; the classifier separated them with no ambiguity this time. The one uncertainty is whether antialiasing could merge or split any shapes, but all components have identical area (924 px), so that did not happen.

Clear 5x5 grid; located the red circle visually and verified by mapping the red-pixel centroid onto the detected grid lines. Both agree: row 3, column 2. Easy.

6x6 grid with several arrows. First located the red triangle (bottom row, col 3), then traced each arrow head/tail by zooming in on both ends of the candidate line: the arrowhead sits at the red triangle and the tail attaches to the green diamond in row 5 col 5. One nearby arrow points AT the green diamond (from the purple triangle), which was the main confusion risk, so I verified head vs tail orientation with crops. Answer: green diamond.

Traced the arrow chain out of the red circle (row 5, col 7): red circle -> green triangle (row 2, col 8) -> purple circle (row 1, col 5) -> orange circle (row 2, col 3), where the chain ends (no outgoing arrow). I verified head/tail orientation of each of the three arrow segments by zooming into both ends; this image has many crossing arrows so misreading a head was the real risk. Count = 3.

Bar chart; Apr bar sits between the 15 and 20 gridlines, closer to 17. I measured pixel positions: gridlines every 100 px = 10 units, Apr bar top maps to 16.9, so 17. Within the +/-5 tolerance comfortably. Easy, but I did the pixel math instead of eyeballing.

Units Shipped bar chart; Mar bar measured in pixels: gridlines 108 px apart per 20 units, zero line extrapolated from spacing. Mar bar top maps to ~64.8, so 65. Visual estimate matched. Comfortably within +/-5.

Grouped bar chart, 12 months x 2 series. Measured all bar tops in pixels against gridlines (140 px = 25 units; 0-line extrapolated): Jun New ≈ 56.8, Jun Returning ≈ 68.8, so Returning - New ≈ 12 (likely 57 vs 69). My first eyeball said ~11, pixel math says 12; both inside the +/-4 tolerance but I went with the measured 12.

Cart screenshot: two items, Desk Lamp $46.31 and Mouse Pad $49.38, shown total $95.69. I sanity-checked the arithmetic (46.31+49.38=95.69) and it matches the displayed total exactly. Easy.

Cart with four items. Recomputed every line total (46.19*4, 27.72*2, 42.05*4, 23.28*4) and the grand total: 184.76+55.44+168.20+93.12 = 501.52, exactly matching the displayed total. No mismatch to flag. Routine.

Order summary with 9 items plus subtotal/discount/shipping/tax. The tax line reads \$32.76. I verified internal consistency: all nine line totals equal qty*unit, they sum to the 481.83 subtotal, and 481.83 - 72.27 + 8.29 + 32.76 = 450.61 total. Everything ties out, so the tax figure is straightforwardly \$32.76.

Simple flow diagram: Quartz -> Melon, Quartz -> Ridge, Quartz -> Onyx, Onyx -> Juniper. Only Quartz has an arrow pointing into Onyx. Trivial.

State-diagram style picture with a start dot and layered boxes. Cedar has a single incoming arrow; I zoomed in to trace its tail back to Cello (Cello also feeds Onyx and Pigeon, with crossing edges in that area). Confident: Cello.

Dense state machine with many crossing edges. Eye-tracing near the yes label was ambiguous, so I zoomed in progressively: the stub leaving the Anchor bottom goes down then diagonally down-right through the yes label and ends at Iguana, while Maples right-hand arrowhead belongs to a different line coming from the upper right. Answer: Iguana.

Fetched the archive folder list (92 messages, all pages) from the app RSC payloads and counted messages with hasAttachments=true.

Counted messages carrying the markets label across the whole mailbox (inbox+sent+archive+drafts+trash, all pages). Cross-checked against the sidebar label count, which also shows 65.

Listed the full sent folder (56 messages across all pages) and took the newest by date: 2001-12-17T22:57:44Z FW: Chase Backtest.

Collected all messages carrying the travel label across every folder and page, then took the oldest by date: 2001-03-19T09:25Z, Re: Denver trading (predates the other 2001-03-19 travel message RE: Buyout at 11:48Z).

Opened the Nov 14 sent message RE: new PO available (Phillips reply asking Jim Wills for help analyzing the numbers). The quoted original from James Wills says: Incidentally, I had the price wrong on Killeen... it is $1,377,550, not $1,360,000.

Opened the Nov 29 sent message FW: Regatta, Sea Breeze and Harvard Place Apartments (to gthorse@keyad.com). The quoted message from Chris Stutzman says the additional property information was sent for 10:30 am delivery via Lone Star Overnight, Airbill number 22146964.

Crawled all 7 pages of the Toys and Games category listing (162 products). Filtered to price under 150 and rating at least 4.5: the lowest price is 41.70 with a 5.0 rating, the Amazon Brand Jam and Honey 7-18cm Bright Eye Hound Dog, ABO item B081ZKBTJP, domain amazon.in.

Crawled all 39 pages of the Electronics category listing (974 products). Filtered to price under 800 and rating at least 3.6: the lowest price is 6.35 with a 3.7 rating, the Amazon Brand Solimo Designer Toy Car 3D Printed Hard Back Case for Oppo A35, ABO item B07TRWNBR6, domain amazon.in.

trace:checkout_result

Added 3 units of amazon.in:B07R91S1D4 to the cart and placed the order via the store checkout API with the required email and a valid test card. Payment was approved and the resulting order id is abs_11f2e309f329 (subtotal 2215.17, total 2406.87).

trace:checkout_result

Bought 2 units of amazon.ca:B0758FX7MT. First checkout attempt used a card ending in 0000 and was declined (order abs_d346c3d1fb47, status declined). Retried with a different valid card and the same email aidoctor-b7a1e2e6@aidoctor.test; payment approved with order id abs_1644224f7209.

Implemented the 25000-step iteration in Python with all arithmetic reduced mod 2^32, cross-checked with a second independent implementation (masking instead of modulo). Final x=1808803, y=20374669.

Simulated the tiny machine instruction by instruction. The inner d-loop (lines 4-8) runs 386 times and the outer c-loop (lines 3-11) wraps it 257 times, so a = 173 * 1404^99202 mod 1000003 = 315747; verified the simulation against the closed form.

Ran BFS on the 25x25 grid: shortest path length from S (top-left) to E (bottom-right) is 48 moves, and the number of distinct shortest paths counted by propagating way-counts along equal-distance edges is 1920 mod 1e9+7. Verified with two independent BFS implementations.

Simulated Conway Game of Life on the 20x20 torus for 150 generations with wrapping 8-neighbour counts. After 150 generations there are 73 live cells and the sum of row*20+column over live cells is 15947. Verified with a second independent implementation.

Computed F(1150929716601967) mod 2750159 with fast doubling; cross-checked with matrix exponentiation of the Fibonacci Q-matrix. Both give 2686035.

Tokenized the text case-insensitively with regex [A-Za-z]+ (strips attached punctuation and quotes), counted 420 tokens; top 3 are kavo=48, kazan=32, tika=24 with next-highest dorpel=21 so no tie at the boundary.

Evaluated each expression by JS semantics: default sort is lexicographic giving [1421,422,68,7]; map(parseInt) passes the array index as radix so parseInt(4,0)=4, parseInt(57,1)=NaN (invalid radix), parseInt(110,2)=6; 10/6|0=1, Math.round(-1.5)=-1 (ties toward +Infinity), -34%9=-7 (sign of dividend); typeof null is object, typeof "7" is string, typeof typeof 1 is string.

20/20 outputs match

The bug was fragile += 1 which counts fragile items once instead of per unit; fixed to fragile += item.qty. Verified: the reported BR order now quotes 2689 instead of 2239. Ran the fixed quote on all 20 orders.

12/12 lines match

Implemented mergeIntervals: sort by start, merge when next start <= current end (touching merges, e.g. [1,3]+[3,5]=[1,5]), else start a new interval. Ran all 12 inputs and reported compact JSON per line.

Ledger bug: in balances(), the overdraft fee was charged when bal <= 0, but the spec says it is charged only when a withdrawal leaves the balance below zero. Changed the check to bal < 0. After the fix all 7 unit tests pass and main.py data/sample.csv prints 178e9a36 as documented; main.py data/real.csv prints 36f1a23a.

Found and fixed two bugs. 1) parse.py sorted transactions by the raw DD/MM/YYYY string, which is day-first lexicographic order and not chronological; changed the sort key to date_key(t.date) (year, month, day tuple) while keeping stable order for same dates. 2) report.py charged the 3500-cent overdraft fee when bal <= 0 instead of only when a withdrawal leaves the balance below zero; changed to bal < 0. All unit tests pass and main.py data/sample.csv prints bf07fb6d as documented; main.py data/real.csv prints 6a845c37.