20220212 TIL

8.올바른 괄호
#문자열 입력받기
a = input()

a = list(a)
cnt = 0
flag=0
for i in range (len(a)):
if(a[0]==')'):

break;

if(cnt<0):

break;

if(a[i]=='('):
cnt+1
if(a[i]==')'):
cnt-1

if(cnt==0 and a[-1]==')'):
flag=1

if(flag==1):
print("yes")
else:
print("no")