ABC174 - Atcoder/Python精進のための解説メモ

x = int(input())
  print('Yes' if x >= 30 else 'No')

n, d = map(int, input().split())
ans = 0
for _ in range(n):
    x, y = map(int, input().split())
    if (x ** 2 + y ** 2) ** 0.5 <= d:
        ans += 1
print(ans)

k = int(input())
kkk = [0] * k
kkk[0] = 7 % k
ans = -1
for i in range(1, k):
    kkk[i] = (kkk[i - 1] * 10 + 7) % k
for j in range(k):
    if kkk[j] == 0:
        ans = j + 1
        break
print(ans)

n = int(input())
ccc = input()
cnt_r = ccc.count('R')
ans = 0
for i in range(cnt_r):
    if ccc[i] == 'W':
        ans += 1
print(ans)