diff --git a/Day 14/part1.cpp b/Day 14/part1.cpp
new file mode 100644
index 0000000..95746db
--- /dev/null
+++ b/Day 14/part1.cpp	
@@ -0,0 +1,125 @@
+#include <iostream>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+using namespace std;
+
+unordered_map<char, unsigned long long> get_count_after_reaction(unordered_map<string, char> reactions, string pair, int reaction_iterations);
+
+int main(int argc, char* argv[])
+{
+    string polymer;
+    getline(cin, polymer);
+
+    unordered_map<string, char> reactions;
+
+    string line;
+    getline(cin, line);
+    while(getline(cin, line))
+    {
+        reactions[line.substr(0,2)] = line[line.size()-1];
+    }
+
+    unordered_map<char, unsigned long long> counts;
+    for(int i = 0; i < polymer.size(); i++)
+    {
+        counts[polymer[i]] = 0;
+    }
+
+    for(int i = 0; i < polymer.size(); i++)
+    {
+        counts[polymer[i]]++;
+    }
+
+    for(int i = 0; i < polymer.size()-1; i++)
+    {
+        string pair = polymer.substr(i,2);
+        unordered_map<char, unsigned long long> pair_counts = get_count_after_reaction(reactions, pair, 10);
+
+        for(auto &it : pair_counts)
+        {
+            if (!counts.contains(it.first))
+            {
+                counts[it.first] = 0;
+            }
+
+            counts[it.first] += it.second;
+        }
+    }
+
+    vector<unsigned long long> counts_list;
+    for (auto &it : counts)
+    {
+        cout << it.first << " " << it.second << endl;
+        counts_list.push_back(it.second);
+    }
+
+    sort(counts_list.begin(), counts_list.end());
+
+    cout << counts_list[counts_list.size()-1]-counts_list[0] << endl;
+}
+
+unordered_map<char, unsigned long long> get_count_after_reaction(unordered_map<string, char> reactions, string pair, int reaction_iterations)
+{
+    static unordered_map<string, vector<unordered_map<char, unsigned long long>>> reaction_cache;
+
+    if (0 == reaction_iterations)
+    {
+        return unordered_map<char, unsigned long long>();
+    }
+
+    if (!reaction_cache.contains(pair))
+    {
+        reaction_cache[pair] = vector<unordered_map<char, unsigned long long>>();
+    }
+
+    if (reaction_cache[pair].size() >= reaction_iterations)
+    {
+        if (reaction_cache[pair][reaction_iterations-1].size() != 0)
+        {
+            return reaction_cache[pair][reaction_iterations-1];
+        }
+    }
+    else
+    {
+        unsigned int old_size = reaction_cache[pair].size();
+        for (unsigned int current_size = old_size; current_size < reaction_iterations; current_size++)
+        {
+            reaction_cache[pair].push_back(unordered_map<char,unsigned long long>());
+        }
+    }
+
+    unordered_map<char, unsigned long long> out_counts;
+    out_counts[reactions[pair]] = 1;
+
+    string left_pair = pair.substr(0,1) + reactions[pair];
+    string right_pair = reactions[pair] + pair.substr(1,1);
+
+    unordered_map<char, unsigned long long> left_counts = get_count_after_reaction(reactions, left_pair, reaction_iterations-1);
+    unordered_map<char, unsigned long long> right_counts = get_count_after_reaction(reactions, right_pair, reaction_iterations-1);
+
+    for (auto &it : left_counts)
+    {
+        if (!out_counts.contains(it.first))
+        {
+            out_counts[it.first] = 0;
+        }
+
+        out_counts[it.first] += it.second;
+    }
+
+    for (auto &it : right_counts)
+    {
+        if (!out_counts.contains(it.first))
+        {
+            out_counts[it.first] = 0;
+        }
+
+        out_counts[it.first] += it.second;
+    }
+
+    reaction_cache[pair][reaction_iterations-1] = out_counts;
+
+    return out_counts;
+}
\ No newline at end of file
diff --git a/Day 14/part2.cpp b/Day 14/part2.cpp
new file mode 100644
index 0000000..d14a4ef
--- /dev/null
+++ b/Day 14/part2.cpp	
@@ -0,0 +1,125 @@
+#include <iostream>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+using namespace std;
+
+unordered_map<char, unsigned long long> get_count_after_reaction(unordered_map<string, char> reactions, string pair, int reaction_iterations);
+
+int main(int argc, char* argv[])
+{
+    string polymer;
+    getline(cin, polymer);
+
+    unordered_map<string, char> reactions;
+
+    string line;
+    getline(cin, line);
+    while(getline(cin, line))
+    {
+        reactions[line.substr(0,2)] = line[line.size()-1];
+    }
+
+    unordered_map<char, unsigned long long> counts;
+    for(int i = 0; i < polymer.size(); i++)
+    {
+        counts[polymer[i]] = 0;
+    }
+
+    for(int i = 0; i < polymer.size(); i++)
+    {
+        counts[polymer[i]]++;
+    }
+
+    for(int i = 0; i < polymer.size()-1; i++)
+    {
+        string pair = polymer.substr(i,2);
+        unordered_map<char, unsigned long long> pair_counts = get_count_after_reaction(reactions, pair, 40);
+
+        for(auto &it : pair_counts)
+        {
+            if (!counts.contains(it.first))
+            {
+                counts[it.first] = 0;
+            }
+
+            counts[it.first] += it.second;
+        }
+    }
+
+    vector<unsigned long long> counts_list;
+    for (auto &it : counts)
+    {
+        cout << it.first << " " << it.second << endl;
+        counts_list.push_back(it.second);
+    }
+
+    sort(counts_list.begin(), counts_list.end());
+
+    cout << counts_list[counts_list.size()-1]-counts_list[0] << endl;
+}
+
+unordered_map<char, unsigned long long> get_count_after_reaction(unordered_map<string, char> reactions, string pair, int reaction_iterations)
+{
+    static unordered_map<string, vector<unordered_map<char, unsigned long long>>> reaction_cache;
+
+    if (0 == reaction_iterations)
+    {
+        return unordered_map<char, unsigned long long>();
+    }
+
+    if (!reaction_cache.contains(pair))
+    {
+        reaction_cache[pair] = vector<unordered_map<char, unsigned long long>>();
+    }
+
+    if (reaction_cache[pair].size() >= reaction_iterations)
+    {
+        if (reaction_cache[pair][reaction_iterations-1].size() != 0)
+        {
+            return reaction_cache[pair][reaction_iterations-1];
+        }
+    }
+    else
+    {
+        unsigned int old_size = reaction_cache[pair].size();
+        for (unsigned int current_size = old_size; current_size < reaction_iterations; current_size++)
+        {
+            reaction_cache[pair].push_back(unordered_map<char,unsigned long long>());
+        }
+    }
+
+    unordered_map<char, unsigned long long> out_counts;
+    out_counts[reactions[pair]] = 1;
+
+    string left_pair = pair.substr(0,1) + reactions[pair];
+    string right_pair = reactions[pair] + pair.substr(1,1);
+
+    unordered_map<char, unsigned long long> left_counts = get_count_after_reaction(reactions, left_pair, reaction_iterations-1);
+    unordered_map<char, unsigned long long> right_counts = get_count_after_reaction(reactions, right_pair, reaction_iterations-1);
+
+    for (auto &it : left_counts)
+    {
+        if (!out_counts.contains(it.first))
+        {
+            out_counts[it.first] = 0;
+        }
+
+        out_counts[it.first] += it.second;
+    }
+
+    for (auto &it : right_counts)
+    {
+        if (!out_counts.contains(it.first))
+        {
+            out_counts[it.first] = 0;
+        }
+
+        out_counts[it.first] += it.second;
+    }
+
+    reaction_cache[pair][reaction_iterations-1] = out_counts;
+
+    return out_counts;
+}
\ No newline at end of file