[백준/파이썬]13871번 Farm robot

-코드

n, c, s = map(int, input().split())
x = list(map(int, input().split()))
p = 1
r = 0

for i in range(len(x)):
    p += x[i]
    if p == n + 1:
        p -= n
    elif p == 0:
        p = n
    if s == p or (s == 1 and i == 0):
        r += 1
print(r)