2-Strings.cpp

#include <bits/stdc++.h>

using namespace std;

string ltrim(const string &);
string rtrim(const string &);

/*
 * Complete the 'twoStrings' function below.
 *
 * The function is expected to return a STRING.
 * The function accepts following parameters:
 *  1. STRING s1
 *  2. STRING s2
 */

string twoStrings(string s1, string s2) {
    unordered_map<char,int>u;
    for(unsigned int i=0;i<s1.size();i++){
        u[s1[i]]++;
    }
    for(int i=0;i<s2.size();i++){
        if(u[s2[i]]>0)
        return "YES";
    }
    return "NO";   
}

int main()
{
    ofstream fout(getenv("OUTPUT_PATH"));

    string q_temp;
    getline(cin, q_temp);

    int q = stoi(ltrim(rtrim(q_temp)));

    for (int q_itr = 0; q_itr < q; q_itr++) {
        string s1;
        getline(cin, s1);

        string s2;
        getline(cin, s2);

        string result = twoStrings(s1, s2);

        fout << result << "\n";
    }

    fout.close();

    return 0;
}

string ltrim(const string &str) {
    string s(str);

    s.erase(
        s.begin(),
        find_if(s.begin(), s.end(), not1(ptr_fun<int, int>(isspace)))
    );

    return s;
}

string rtrim(const string &str) {
    string s(str);

    s.erase(
        find_if(s.rbegin(), s.rend(), not1(ptr_fun<int, int>(isspace))).base(),
        s.end()
    );

    return s;
}