给定一个单词列表,只返回可以使用在键盘同一行的字母打印出来的单词。键盘如下图所示。
class Solution {
public:
vector<string> findWords(vector<string>& words) {
vector<string> res;
for(auto w: words)
{
int id=getid(w[0]);
// cout<<id<<endl;
int len=w.length();
int i;
for(i=1;i<len;i++)
if(!(l[id].count(w[i]) ||l[id].count(w[i]+32) ) )
break;
if(i==len) res.push_back(w);
}
return res;
}
private:
vector<unordered_set<char>> l={\{'q','w','e','r','t','y','u','i','o','p'},{'a','s','d','f','g','h','j','k','l'},{'z','x','c','v','b','n','m'} };
// unordered_set<char> l1={'q','w','e','r','t','y','u','i','o','p'};
// unordered_set<char> l2={'a','s','d','f','g','h','j','k','l'};
// unordered_set<char> l3={'z','x','c','v','b','n','m'};
int getid(char a)
{
for(int i=0;i<3;i++)
if(l[i].count(a) || l[i].count(a+32)) return i;
//cout<<a<<endl;
// cout<<l[1].count('h')<<endl;
return -1;
}
};