【杭电】[1102]Constructing Roads

【CodeForces】[597A]Divisibility

【CodeForces】[624A]Save Luke

【CodeForces】[300A]Array

【CodeForces】[638A]Home Numbers

【CodeForces】[366A]Dima and Guards

【杭电】[2087]剪花布条

【CodeForces】[651C]Watchmen

【CodeForces】[675B]Restoring Painting

【CodeForces】[667A]Pouring Rain

【CodeForces】[669A]Little Artem and Presents

【CodeForces】[675A]Infinite Sequence

【CodeForces】[673A]Bear and Game

【CodeForces】[651B]Beautiful Paintings

【CodeForces】[621B]Wet Shark and Bishops