N=int(input())
count=0

A=[0,1,4,10,21,42,84,169,340,682,1365,2730,5460,10921,21844,43690,87381,174762,349524,699049,1398100,2796202,5592405]


ss=25
count=A[-1]

for i in range(len(A)):
    if A[i]>=N:
        ss=i-1+3
        count=A[i-1]
        break


for j in range(1<<ss):
    if j%2==0:
        continue
    c=0
    for k in range(ss):
        if j & (1<<k) !=0:
            c+=1
        
    if c%3!=0:
        continue

    count+=1
    
    if count==N:
        y=""
        for k in bin(j)[2:].zfill(ss):
            if k=="0":
                y+="3"
            else:
                y+="5"
        print(y)
        break