题解（唯一Python题解！！！）

n = int(input())
coefficients = list(map(int, input().split()))
terms = []

for i in range(n + 1):
power = n - i
coeff = coefficients[i]
if coeff == 0:
continue

term_parts = []
# 处理符号和系数
if coeff > 0:
    if i != 0:  # 不是第一项，需要加 +
        term_parts.append('+')
else:
    term_parts.append('-')

abs_coeff = abs(coeff)
# 处理系数是否为1的情况（除了常数项）
if abs_coeff != 1 or power == 0:
    term_parts.append(str(abs_coeff))

# 处理变量部分
if power > 1:
    term_parts.append(f'x^{power}')
elif power == 1:
    term_parts.append('x')

term = ''.join(term_parts)
terms.append(term)

polynomial = ''.join(terms)
print(polynomial)