私の解答
N, M = map(int,input().split())
li = [int(x) for x in input().split()]
print(li.count(N))
解答例1
values = input().split()
N = int(values[0])
M = int(values[1])
A = [0] * M
values = input().split()
for i in range(M):
A[i] = int(values[i])
ans = 0
for a in A:
if a == N:
ans += 1
print(ans)
解答例2
N, M = map(int, input().split())
A = [int(x) for x in input().split()]
print(A.count(N))