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#include "leetcode.h"
class WordFilter {
public:
WordFilter(vector<string> &words) {
int n = words.size();
for (int i = 0; i < n; i++) {
string word = words[i];
int wordSize = word.size();
for (int j = 1; j <= wordSize; j++) {
string p = word.substr(0, j);
for (int k = 0; k < wordSize; k++) {
string s = word.substr(k, wordSize);
hashMap[p + '|' + s] = i + 1;
}
}
}
}
int f(string prefix, string suffix) {
string s = prefix + '|' + suffix;
return hashMap[s] - 1;
}
private:
unordered_map<string, int> hashMap;
};
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