# dwite52.py

inFile = open("DATA2.txt","r")
ans = []

for i in range(5):
    blocks = int(inFile.readline().strip())
    combos = []
    for x in range(1,blocks+1):
        for y in range(1,blocks+1):
            if x * y <= (blocks + 1):
                if (x,y) not in combos and (y,x) not in combos:
                    combos.append((x,y))
    ans.append(str(len(combos)))

inFile.close()
outFile = open("OUT2.txt","w")
outFile.write("\n".join(ans))
outFile.close()