I recently did  lc #279 - perfect squares and was blown away by the lagrange\'s four-square solution.\nunless you remeber theorem like this , you may not able to come up with the optimial solution in the interview.\nare there general gudiance on famous theorems one should know for coding interview?

I recently did  lc #279 - perfect squares and was blown away by the lagrange\'s four-square solution.\nunless you remeber theorem like this , you may not able t