Isn't there a way for me to find the test cases which are hitting wrong on codeforces platform. Here is my submission :

Problem D

My solution to the problem 1665C - Tree Infection : 153109990 gives WA on test6 and i am unable to find the corner case . If possible, please help correcting my solution

i was on this problem for a while 1538G - Gift Set , i wrote my code 120665262 / https://codeforces.com/contest/1538/submission/120665262 for solution.

it gives WA on test case 2 where 1103rd numbers do not match.

i used basic geometry to solve the problem.(mayb its called linear programming — i dont know exactly.)

Anyone having suggestions what m doing wrong here. THANKS.

I was trying to solve 1529C - Parsa's Humongous Tree.

i used the below code which gave memory limit exceeded.

117290969

then i used fill() instead of clear() function which was also used in the tutorials. And i got my soln ac.

117291317

I used clear() in first code whereas fill() in the later one. WHAT IS THE DIFFERENCE BETWEEN THOSE TWO??