Adding solution for 2108

C++/2108.cpp

@@ -0,0 +1,45 @@
+#include <iostream>
+#include <cstdint>
+#include <vector>
+#include <string>
+
+using std::vector;
+using std::string;
+
+class Solution {
+public:
+    string firstPalindrome(vector<string>& words) {
+        auto isPalindrome = [](string s) {
+            unsigned int i = 0;
+            unsigned int j = s.size() - 1;
+            while ( j > i ) {
+                if ( s[i] != s[j] ) { return false; }
+                ++i; --j;
+            }
+            return true;
+        };
+        auto len = words.size();
+        auto i = len;
+        for ( i = 0; i < len; ++i ) {
+            if ( isPalindrome(words[i]) ) { return words[i]; }
+        }
+        return "";
+    }
+};
+
+void r(vector<string>& w) {
+    std::cout << "Solution().firstPalindrome([";
+    for ( uint64_t i = 0; i < w.size(); ++i ) {
+        if ( i == 0 ) { std::cout << "\"" << w[i] << "\""; continue; }
+        std::cout << ", \"" << w[i] << "\"";
+    }
+    std::cout << "]) = \"" << Solution().firstPalindrome(w) << "\"";
+};
+
+int main(void) {
+
+    vector<string> w1 = {"abc", "car", "ada", "racecar", "cool"};
+    r(w1);
+
+    return 0;
+}

C++/build.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+newest_file="$(find ./ -type f -printf "%T@ %p\n" | sort -n | cut -d' ' -f 2- | tail -n 1)"
+
+set -x
+g++ -O0 -ggdb -Wall -Wextra -Werror $newest_file -o /tmp/out || exit 1
+/tmp/out