Intersection of LL - RunError in one test case

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Hello @abhishekchoudhary,

The reason for run-time error is:
int diff = m - n;

PROBLEM:
How are you so sure that the first list would be longer than another?

SOLUTION:
if m>n do:
m-n and move ahead in first list.
else
n-m and move ahead in the second list.

Hope, this would help.
Give a like if you are satisfied.