http://mirror.codeforces.com/contest/691/submission/20656594 http://mirror.codeforces.com/contest/691/submission/20656228
I wonder why one is AC but the other got TLE.
C++11 VS C++14
http://mirror.codeforces.com/contest/691/submission/20656594 http://mirror.codeforces.com/contest/691/submission/20656228
I wonder why one is AC but the other got TLE.