include[HTML_REMOVED]
include[HTML_REMOVED]
int main()
{
char str[50000];
scanf(“%s”,str);
int n=strlen(str);
int res=0,cnt=0;
for(int i=0;i<n;i)
{
if(str[i]==’(‘&&str[i+1]==’(‘)
cnt;
else if(str[i]==’)’&&str[i+1]==’)’)
res+=cnt;
}
printf(“%d”,res);
return 0;
}