CREATE TABLE table_13413 ("Overall points" TEXT, "100 m" TEXT, "400 m" TEXT, "110 m H" TEXT, "1500 m" TEXT)

What is the 100 m time when the overall points are dnf, and the 400 m is dns?
SELECT "100 m" FROM table_13413 WHERE "Overall points" = 'dnf' AND "400 m" = 'dns'
SELECT "100 m" FROM "table_13413" WHERE "400 m" = 'dns' AND "Overall points" = 'dnf'