Well...I'm operating on the assumption that you know how to read. And I did point to the passage in which imputation is clearly taught. But since you, evidently, don't read too swell, here are the specific texts:
Rom 5:15
15 But the gift is not like the trespass. For if the many died by the trespass of the one man, how much more did God's grace and the gift that came by the grace of the one man, Jesus Christ, overflow to the many!
NIV
And,
Rom 5:18-19
18 Consequently, just as the result of one trespass was condemnation for all men, so also the result of one act of righteousness was justification that brings life for all men. 19 For just as through the disobedience of the one man the many were made sinners, so also through the obedience of the one man the many will be made righteous.
NIV
As stated earlier if Adam's sin is not imputed to all his progeny then neither is the Last Adam's perfect obedience imputed to the "many" to make them righteous.