Upload generation and checking scripts

README.md

@@ -23,14 +23,14 @@ Each row has the form
 123 = (x1)^3 + (x2)^3 + (x3)^3 + (x4)^3
 ```
 
-The files are sharded by intervals of length `10,000,000`:
+The files are sharded by intervals of length `10,000,000`, with the endpoint
+`1,000,000,000` appended to the last shard:
 
 ```text
 cubes-00.txt   0 <= n <= 9,999,999
 cubes-01.txt   10,000,000 <= n <= 19,999,999
 ...
-cubes-99.txt   990,000,000 <= n <= 999,999,999
-cubes-100.txt  n = 1,000,000,000
+cubes-99.txt   990,000,000 <= n <= 1,000,000,000
 ```
 
 The generation code uses a congruence-filtered generalized Pell search.  For
@@ -56,6 +56,7 @@ sage -python scripts/generate_hf_dataset.py \
   --max-in-flight 30 \
   --out-dir generated/sum4cubes \
   --overwrite \
+  --merge-final-singleton \
   --progress-every 10000000
 ```