fix reimport bug when creating existing dirs
fix reimport bug when creating existing dirs

nattee/cafe-grader-judge-scripts,nattee/cafe-grader-judge-scripts,nattee/cafe-grader-judge-scripts,nattee/cafe-grader-judge-scripts,jittat/cafe-grader-judge-scripts,jittat/cafe-grader-judge-scripts,nattee/cafe-grader-judge-scripts,jittat/cafe-grader-judge-scripts,jittat/cafe-grader-judge-scripts