20210505v1

• Solved overflow problem: Use unsign long to store answer
  

20210504v3

20210504v2

Edit Log

• Change line break

Result

• Line break is not the problem
  

20210504v1

• Speed up: Save malloc time

Result

• 🎉Solve time limit problem (3s)

20210504v0

Edit log:
20210503v2...20210504v0

20210503v2

20210503v1

20210503v0