These are two forms of the same verb: podići or podignuti, composed of the verb dići or dignuti.
Present tense: podignem / dignem
Perfect: podignuo sam or podigao sam / dignuo sam or digao sam
podići (ruku) - to raise (one's arm)
podići kuću - to build a house
podići novac - to withdraw money
Best regards,
Magdalena