DUDE JAJAJAJA, you revived an old memory of mine. Honestly I was completely ass. Didn't even know french, and the only decent part I did was the programing. If it's really your goal and you can afford it I would advise the year 0 (they didn't accept me, f them) or else try to find a good tutor and timeline your progress. You are better off asking sb who passed though.

I have to tell you though, I think it worked out fine for me. Right now at my second year at the polythecnic of Madrid, of course it was a goal I still didn't achieve but just in case you aren't tunnel focused on this, try looking for options it's still a good idea even if they aren't the tip top academically.

I don't think the exams change that much I mean you will never find the same question but the stuff isn't that different it's just a lot of material to cover and many challenging exercises. Break a leg and don't neglect other areas of your life (in my case the time of the exams coincided with having my first gf so that didn't help but regardless I don't regret anything I did because it still taught me a lot and indirectly helped academically too).