696. Count Binary Substrings

static int wing=[]()
{
    std::ios::sync_with_stdio(false);
    cin.tie(NULL);
    return 0;
}();

class Solution 
{
public:
    int countBinarySubstrings(string s) 
    {
        int count=0;
        int pre=0,cur=1;
        int len=s.length();
        for(int i=1;i<len;i++)
        {
            if(s[i]==s[i-1])
                cur++;
            else
            {
                count+=min(pre,cur);
                pre=cur;
                cur=1;
            }             
        }
        return count+min(pre,cur);
    }
};

简单快捷