inFile = open("DATA2.txt","r")
outFile = open("OUT2.txt","w")
#---(X'___')----#
for i in range(5):
    count=0
    n=1
    a= int(inFile.readline())
    while n*n<=a:
        count+=((a-n*n)/n)+1
        n+=1
    outFile.write(str(count)+"\n")
inFile.close()
outFile.close()