https://mirror.codeforces.com/problemset/problem/1380/C https://mirror.codeforces.com/contest/2091/problem/B both problems are same one is 800 other one is 1400
https://mirror.codeforces.com/problemset/problem/1380/C https://mirror.codeforces.com/contest/2091/problem/B both problems are same one is 800 other one is 1400
I solved 300 problems and today I dropped out of pupil