codeforces

• 2017-02-27
  Codeforces402-div2D String Game
  comp
  codeforces
  二分探索
• 2017-02-27
  Codeforces402 div2C Dishonest Sellers
  comp
  codeforces
  greedy
• 2017-02-25
  Codeforces401 div2E Hanoi Factory
  comp
  codeforces
  stack
• 2017-02-25
  Codeforces401 div2D Could of Hashtags
  comp
  codeforces
  greedy lexicographical
• 2017-02-25
  Codeforces401 div2C Alyona and Spreadsheet
  comp
  codeforces
  区間処理