Problem link : https://codeforces.com/contest/1620/problem/C
Submission link : https://codeforces.com/contest/1620/submission/162394549
HELP: Runtime error on test 2
Problem link : https://codeforces.com/contest/1620/problem/C
Submission link : https://codeforces.com/contest/1620/submission/162394549