In this challenge, Montgomery form of curve was provided, so new addition and multiplication formulas were needed. This time, we had to multiply generator point by 0x1337c0decafe, but firstly, we had to find Y coordinate of G. It is easy to get square of it by just passing it's x to the curve formula, but then it would be necessary to find it's root what is more difficult. One could either implement an algorithm for finding it or use a ready function from sage math and get whole point G with one function lift_x.
crypto{49231350462786016064336756977412654793383964726771892982507420921563002378152}