static int _ = []() {
    ios::sync_with_stdio(false);
    cin.tie();
    return 0;
}();

1. Two Sum
2. Add Two Numbers
3. Longest Substring Without Repeating Characters
4. Median of Two Sorted Arrays
5. Longest Palindromic Substring
6. ZigZag Conversion
7. Reverse Integer
8. String to Integer (atoi)
9. Palindrome Number
10. Regular Expression Matching
11. Container With Most Water
12. Integer to Roman
13. Roman to Integer
14. Longest Common Prefix