{"id":"clockwise-rotation-formula","text":"`mat[n-1-j][i]` maps a source position to a 90° clockwise rotation of an n×n matrix; confusing this with counterclockwise (`mat[j][n-1-i]`) would produce incorrect results.","truth_value":"IN","source":"entries/2026/06/06/determine-whether-matrix-can-be-obtained-by-rotation-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"clockwise-rotation-formula","truth_value":"IN","reason":"premise"}]}}