Number of Strings That Appear as Substrings in Word

<-E 1967> Number of Strings That Appear as Substrings in Word

class Solution {
public:
    int numOfStrings(vector<string>& patterns, string word) {
        int count = 0;
        for(int i=0; i < patterns.size(); i++) {
            if(word.find(patterns[i]) != string::npos)
                count++;
        }
        return count;
    }
};