Free practice · numeric · medium

Practice

Calculate a sequence duration

A required sequence has four non-overlapping tasks lasting 12, 18, 10, and 20 minutes. How many minutes does the full sequence take?

Constraint board

Place forced items before testing open positions

  1. RecordWrite each constraint
  2. ForcePlace fixed items and chains
  3. PropagateUpdate remaining positions
  4. TestTry valid alternatives
  5. VerifyCheck every original rule

Translate every precedence, adjacency, window, and exclusion rule into visible placement evidence.