태야

<내 코드>

n = int(input())
cnt = 0
for _ in range(n):
    s = input()
    done = [s[0]]
    for i in range(1, len(s)):
        if (s[i] != s[i-1] or s[i] == s[i-1]) and s[i] not in done:
            done.append(s[i])
        elif s[i] != s[i-1] and s[i] in done:
            done.append(-1)
            break
    if -1 not in done:
        cnt += 1

print(cnt)

<내 코드>

s = input().lower()

words = list(set(s))
arr = []
for i in words:
    arr.append(s.count(i))

if arr.count(max(arr)) >= 2:
    print('?')
else:
    print(words[arr.index(max(arr))].upper())

<내 코드>

T = int(input())
for _ in range(T):
    R, S = input().split()
    R = int(R)
    result = ""
    for i in range(len(S)):
        result += S[i] * R
    print(result)

<내 코드>

T = int(input())
for _ in range(T):
    case = input()
    cnt = 0
    for i in case:
        if i == '(':
            cnt += 1
        elif i == ')':
            cnt -= 1

        if cnt < 0:
            print("NO")
            break
    if cnt == 0:
        print("YES")
    elif cnt > 0:
        print("NO")