LC5906-句子中的有效单词数

5906. 句子中的有效单词数

暴力

class Solution {
public:
    int countValidWords(string sentence) {
        int cnt = 0, n = sentence.size();
        for(int i = 0; i < n; ++i){
            if(sentence[i] == ' ')continue;
            int j = i, cc = 0;
            bool f = true;
            for(;j + 1 < n && sentence[j + 1] != ' '; ++j);
            for(int k = i; k <= j; ++k){
                if(sentence[k] == '-' && cc == 0){
                    cc ++;
                    if(k > i && k <= j - 1 &&sentence[k - 1] >= 'a' && sentence[k - 1] <= 'z' 
                       &&sentence[k + 1] >= 'a' && sentence[k + 1] <= 'z' );
                        else f = false;
                }
                else if(sentence[k] == '-' && cc == 1) f= false;
                if(sentence[k] == '!' || sentence[k] == '.' || sentence[k] == ','){
                    if(k == j);else f = false;
                }
                if(sentence[k] >= '0' && sentence[k] <= '9') f = false;
            }
            if(f)cnt++;
            for(; sentence[j + 1] == ' '; ++j);
            i = j;
        }
        return cnt;
    }
};