In yesterday's codeforces round 636(Div 3.)

https://codeforces.com/contest/1343/submission/77564353 This is my solution for D which I submitted during contest. It gave me TLE in system testing on TC11. Now i copied exactly the same code and submitted it after the contest(and after the system testing) https://codeforces.com/contest/1343/submission/77619357. This is the link for the same. It is Accepted by the system. moreover i have submiited the same code 3 -4 times after contest it is showing AC every time. Now can somoene please explain to me why is all this happening and if my code is AC will i get marks for it?? Plz someone if have any idea why this is happening reply