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I fixed the timeout issue in our source code and added more slack to cases where n<=1000 since ideally the timeout shouldn't be happening.
Also the provided string replacement code has a potential issue: say we have the model
X_10 + X_1
with the mappingX_0: 'a', X_1: 'b', ... 'X_10': 'k'
, the provided code will turnX_10 + X_1
intob0 + b
rather than the intendedk + b
since it will replace allX_1
instances withb
. To fix this, I iterated through the variables in reversed order (see the commit). I remember seeing this code used in at least one other submission, so this might be an issue if methods are responsible for doing their own variable name replacement.