/usr/share/librecad/library/algoritm/ is in librecad-data 2.0.9-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/librecad/library/algoritm/alg1.dxf
/usr/share/librecad/library/algoritm/alg10.dxf
/usr/share/librecad/library/algoritm/alg11.dxf
/usr/share/librecad/library/algoritm/alg12.dxf
/usr/share/librecad/library/algoritm/alg13.dxf
/usr/share/librecad/library/algoritm/alg14.dxf
/usr/share/librecad/library/algoritm/alg15.dxf
/usr/share/librecad/library/algoritm/alg16.dxf
/usr/share/librecad/library/algoritm/alg17.dxf
/usr/share/librecad/library/algoritm/alg18.dxf
/usr/share/librecad/library/algoritm/alg19.dxf
/usr/share/librecad/library/algoritm/alg2.dxf
/usr/share/librecad/library/algoritm/alg20.dxf
/usr/share/librecad/library/algoritm/alg21.dxf
/usr/share/librecad/library/algoritm/alg22.dxf
/usr/share/librecad/library/algoritm/alg23.dxf
/usr/share/librecad/library/algoritm/alg24.dxf
/usr/share/librecad/library/algoritm/alg25.dxf
/usr/share/librecad/library/algoritm/alg26.dxf
/usr/share/librecad/library/algoritm/alg27.dxf
/usr/share/librecad/library/algoritm/alg28.dxf
/usr/share/librecad/library/algoritm/alg29.dxf
/usr/share/librecad/library/algoritm/alg3.dxf
/usr/share/librecad/library/algoritm/alg30.dxf
/usr/share/librecad/library/algoritm/alg31.dxf
/usr/share/librecad/library/algoritm/alg32.dxf
/usr/share/librecad/library/algoritm/alg33.dxf
/usr/share/librecad/library/algoritm/alg34.dxf
/usr/share/librecad/library/algoritm/alg35.dxf
/usr/share/librecad/library/algoritm/alg4.dxf
/usr/share/librecad/library/algoritm/alg5.dxf
/usr/share/librecad/library/algoritm/alg6.dxf
/usr/share/librecad/library/algoritm/alg7.dxf
/usr/share/librecad/library/algoritm/alg8.dxf
/usr/share/librecad/library/algoritm/alg9.dxf