【Leetcode_easy】771. Jewels and Stones

problem

​​771. Jewels and Stones​​

solution1:

class Solution {
public:
int numJewelsInStones(string J, string S) {
int res = 0;
unordered_set<char> js(J.begin(), J.end());
for(auto ch:S)
{
if(js.find(ch)!=js.end()) res++;
}
return res;
}
};

 

参考

1. ​​Leetcode_easy_771. Jewels and Stones​​;

2. ​​Grandyang​​;

完