Initial commit

1 files changed, 35 insertions, 0 deletions

diff --git a/01_introductory_problems/palindrome_reorder_1755.cpp b/01_introductory_problems/palindrome_reorder_1755.cpp
new file mode 100644
index 0000000..8ebf4f4
--- /dev/null
+++ b/01_introductory_problems/palindrome_reorder_1755.cpp
@@ -0,0 +1,35 @@
+#include <iostream>
+#include <string>
+
+void printn(char c, int n) {
+        for (int i = 0; i < n; i++)
+                std::cout << c;
+}
+
+int main() {
+        std::string s;
+        int odd{0}, a['Z'+1] = {0};
+        char oddc{0};
+        std::cin >> s;
+        for (auto c : s)
+                a[(size_t)c]++;
+        for (char c = 'A'; c <= 'Z'; c++) {
+                if (a[(size_t)c] % 2) {
+                        odd++;
+                        oddc = c;
+                }
+        }
+        if (odd > 1) {
+                std::cout << "NO SOLUTION\n";
+        } else {
+                for (char c = 'A'; c <= 'Z'; c++)
+                        if (c != oddc)
+                                printn(c, a[(size_t)c]/2);
+                if (odd)
+                        printn(oddc, a[(size_t)oddc]);
+                for (char c = 'Z'; c >= 'A'; c--)
+                        if (c != oddc)
+                                printn(c, a[(size_t)c]/2);
+                std::cout << std::endl;
+        }
+}