Day 2 Division A and Day 2 Segment Tree Contest materials uploaded

Day 2 Division A, Day 2 Geometry Division B and Day 2 Segment Tree Division B contest materials (analysis, analysis+lecture) are uploaded in appropriate places. Same link “attachments” for the upsolving contains zip-archive of all currently available materials.

Day 1 materials uploaded

In contest of first day problem materials are updated with analysis and presentation