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-rw-r--r--other/num_matching_subsequence.cpp34
1 files changed, 34 insertions, 0 deletions
diff --git a/other/num_matching_subsequence.cpp b/other/num_matching_subsequence.cpp
new file mode 100644
index 0000000..a97d464
--- /dev/null
+++ b/other/num_matching_subsequence.cpp
@@ -0,0 +1,34 @@
+#include "leetcode.h"
+
+class Solution {
+public:
+ int numMatchingSubseq(string s, vector<string> &words) {
+ int ans = 0;
+ unordered_map<string, int> up;
+ for (int i = 0; i < words.size(); i++)
+ up[words[i]]++;
+ for (auto it = up.begin(); it != up.end(); it++)
+ if (helper(s, it->first))
+ ans += it->second;
+ return ans;
+ }
+
+private:
+ int helper(string a, string b) {
+ int i = 0, j = 0, m = a.size(), n = b.size();
+ while (i < m && j < n) {
+ if (a[i] == b[j])
+ i++, j++;
+ else
+ i++;
+ }
+ return (j == n);
+ }
+};
+
+int main() {
+ Solution obj;
+ string s = "abcde";
+ vector<string> words = {"a", "bb", "acd", "ace"};
+ cout << obj.numMatchingSubseq(s, words);
+}