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l1,l2=[],[] for l in open("i"):x,y=map(int,l.split());l1+=[x];l2+=[y] l1.sort();l2.sort() t=sum(abs(l1[i]-l2[i])for i in range(len(l1))) print(t) l1,l2=[],{} for l in open("i"):x,y=map(int,l.split());l1+=[x];l2[y]=l2.get(y,0)+1 s=sum(x*l2[x]for x in l1 if x in l2) print(s) #adventofcode day1