PAT Advanced 1049 Counting Ones (30) [数学问题-简单数学问题]
题目Thetaskissimple:givenanypositiveintegerN,youaresupposedtocountthetotalnumberof1’sinthedecimalformoftheintegersfrom1toN.Forexample,givenNbeing12,therearefive1’sin1,10,11,and12.InputSpecification:Each