Problem link: https://mirror.codeforces.com/contest/1472/problem/E
Submission link: https://mirror.codeforces.com/contest/1472/submission/165709605
NEED HELP: WA
Problem link: https://mirror.codeforces.com/contest/1472/problem/E
Submission link: https://mirror.codeforces.com/contest/1472/submission/165709605