题解 | #尼科彻斯定理#

import sys

def solu(a ):
    return list(range(1, sum( list(range(1, a + 1)) ) * 2 + 1, 2))[-a:]

for line in sys.stdin:
    a = int(line.strip())
    print("+".join(map(str,  solu(a) )) )