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 </p>
 
 
+## Campaign
+
+<sub>8-week interview-prep fight camp. Each phase is a milestone; each topic an issue; each problem a sub-issue. Core count reflects closed sub-issues.</sub>
+
+<table>
+  <thead>
+    <tr>
+      <th align="center">Phase</th>
+      <th align="center">Wk</th>
+      <th align="left">Date</th>
+      <th align="left">Topic</th>
+      <th align="center">Core</th>
+      <th align="left">Core&nbsp;problems</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td rowspan="7" align="center"><strong>I</strong><br><sub>Linear Structures</sub></td>
+      <td align="center">1</td><td>Mon Aug 17</td><td><a href="https://github.com/prdlk/leetcode/issues/3"><strong>01</strong> · Hash-Based Lookup</a></td><td align="center">5/5</td><td><a href="https://leetcode.com/problems/contains-duplicate/">217</a> · <a href="https://leetcode.com/problems/valid-anagram/">242</a> · <a href="https://leetcode.com/problems/two-sum/">1</a> · <a href="https://leetcode.com/problems/group-anagrams/">49</a> · <a href="https://leetcode.com/problems/top-k-frequent-elements/">347</a></td>
+    </tr>
+    <tr>
+      <td align="center">1</td><td>Tue Aug 18</td><td><a href="https://github.com/prdlk/leetcode/issues/4"><strong>02</strong> · Prefix Sum</a></td><td align="center">3/3</td><td><a href="https://leetcode.com/problems/range-sum-query-immutable/">303</a> · <a href="https://leetcode.com/problems/product-of-array-except-self/">238</a> · <a href="https://leetcode.com/problems/subarray-sum-equals-k/">560</a></td>
+    </tr>
+    <tr>
+      <td align="center">2</td><td>Mon Aug 24</td><td><a href="https://github.com/prdlk/leetcode/issues/5"><strong>03</strong> · Two Pointers</a></td><td align="center">2/4</td><td><a href="https://leetcode.com/problems/valid-palindrome/">125</a> · <a href="https://leetcode.com/problems/two-sum-ii-input-array-is-sorted/">167</a> · <a href="https://leetcode.com/problems/3sum/">15</a> · <a href="https://leetcode.com/problems/container-with-most-water/">11</a></td>
+    </tr>
+    <tr>
+      <td align="center">2</td><td>Tue Aug 25</td><td><a href="https://github.com/prdlk/leetcode/issues/6"><strong>04</strong> · Sliding Window</a></td><td align="center">1/4</td><td><a href="https://leetcode.com/problems/best-time-to-buy-and-sell-stock/">121</a> · <a href="https://leetcode.com/problems/longest-substring-without-repeating-characters/">3</a> · <a href="https://leetcode.com/problems/longest-repeating-character-replacement/">424</a> · <a href="https://leetcode.com/problems/permutation-in-string/">567</a></td>
+    </tr>
+    <tr>
+      <td align="center">2</td><td>Wed Aug 26</td><td><a href="https://github.com/prdlk/leetcode/issues/7"><strong>05</strong> · Binary Search</a></td><td align="center">3/5</td><td><a href="https://leetcode.com/problems/binary-search/">704</a> · <a href="https://leetcode.com/problems/koko-eating-bananas/">875</a> · <a href="https://leetcode.com/problems/search-in-rotated-sorted-array/">33</a> · <a href="https://leetcode.com/problems/search-a-2d-matrix/">74</a> · <a href="https://leetcode.com/problems/find-minimum-in-rotated-sorted-array/">153</a></td>
+    </tr>
+    <tr>
+      <td align="center">2</td><td>Thu Aug 27</td><td><a href="https://github.com/prdlk/leetcode/issues/8"><strong>06</strong> · Stack</a></td><td align="center">0/3</td><td><a href="https://leetcode.com/problems/valid-parentheses/">20</a> · <a href="https://leetcode.com/problems/min-stack/">155</a> · <a href="https://leetcode.com/problems/evaluate-reverse-polish-notation/">150</a></td>
+    </tr>
+    <tr>
+      <td align="center">2</td><td>Fri Aug 28</td><td><a href="https://github.com/prdlk/leetcode/issues/9"><strong>07</strong> · Monotonic Stack</a></td><td align="center">0/2</td><td><a href="https://leetcode.com/problems/daily-temperatures/">739</a> · <a href="https://leetcode.com/problems/car-fleet/">853</a></td>
+    </tr>
+    <tr>
+      <td rowspan="3" align="center"><strong>II</strong><br><sub>Nodal & Grid</sub></td>
+      <td align="center">3</td><td>Mon Aug 31</td><td><a href="https://github.com/prdlk/leetcode/issues/10"><strong>08</strong> · Linked List</a></td><td align="center">0/3</td><td><a href="https://leetcode.com/problems/reverse-linked-list/">206</a> · <a href="https://leetcode.com/problems/merge-two-sorted-lists/">21</a> · <a href="https://leetcode.com/problems/linked-list-cycle/">141</a></td>
+    </tr>
+    <tr>
+      <td align="center">3</td><td>Tue Sep 1</td><td><a href="https://github.com/prdlk/leetcode/issues/11"><strong>09</strong> · Hybrid Structures</a></td><td align="center">0/2</td><td><a href="https://leetcode.com/problems/lru-cache/">146</a> · <a href="https://leetcode.com/problems/add-two-numbers/">2</a></td>
+    </tr>
+    <tr>
+      <td align="center">3</td><td>Wed Sep 2</td><td><a href="https://github.com/prdlk/leetcode/issues/12"><strong>10</strong> · Matrix Index Math</a></td><td align="center">0/3</td><td><a href="https://leetcode.com/problems/rotate-image/">48</a> · <a href="https://leetcode.com/problems/spiral-matrix/">54</a> · <a href="https://leetcode.com/problems/set-matrix-zeroes/">73</a></td>
+    </tr>
+    <tr>
+      <td rowspan="5" align="center"><strong>III</strong><br><sub>Hierarchical</sub></td>
+      <td align="center">3</td><td>Thu Sep 3</td><td><a href="https://github.com/prdlk/leetcode/issues/13"><strong>11</strong> · Tree DFS</a></td><td align="center">0/3</td><td><a href="https://leetcode.com/problems/invert-binary-tree/">226</a> · <a href="https://leetcode.com/problems/maximum-depth-of-binary-tree/">104</a> · <a href="https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree/">236</a></td>
+    </tr>
+    <tr>
+      <td align="center">3</td><td>Fri Sep 4</td><td><a href="https://github.com/prdlk/leetcode/issues/14"><strong>12</strong> · Tree BFS</a></td><td align="center">0/3</td><td><a href="https://leetcode.com/problems/binary-tree-level-order-traversal/">102</a> · <a href="https://leetcode.com/problems/binary-tree-right-side-view/">199</a> · <a href="https://leetcode.com/problems/count-good-nodes-in-binary-tree/">1448</a></td>
+    </tr>
+    <tr>
+      <td align="center">4</td><td>Mon Sep 7</td><td><a href="https://github.com/prdlk/leetcode/issues/15"><strong>13</strong> · Binary Search Tree</a></td><td align="center">0/3</td><td><a href="https://leetcode.com/problems/validate-binary-search-tree/">98</a> · <a href="https://leetcode.com/problems/kth-smallest-element-in-a-bst/">230</a> · <a href="https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree/">235</a></td>
+    </tr>
+    <tr>
+      <td align="center">4</td><td>Tue Sep 8</td><td><a href="https://github.com/prdlk/leetcode/issues/16"><strong>14</strong> · Heap / Priority Queue</a></td><td align="center">0/3</td><td><a href="https://leetcode.com/problems/kth-largest-element-in-an-array/">215</a> · <a href="https://leetcode.com/problems/k-closest-points-to-origin/">973</a> · <a href="https://leetcode.com/problems/merge-k-sorted-lists/">23</a></td>
+    </tr>
+    <tr>
+      <td align="center">4</td><td>Wed Sep 9</td><td><a href="https://github.com/prdlk/leetcode/issues/17"><strong>15</strong> · Trie</a></td><td align="center">0/2</td><td><a href="https://leetcode.com/problems/implement-trie-prefix-tree/">208</a> · <a href="https://leetcode.com/problems/design-add-and-search-words-data-structure/">211</a></td>
+    </tr>
+    <tr>
+      <td rowspan="4" align="center"><strong>IV</strong><br><sub>Relational</sub></td>
+      <td align="center">4</td><td>Thu Sep 10</td><td><a href="https://github.com/prdlk/leetcode/issues/18"><strong>16</strong> · Graph DFS</a></td><td align="center">0/3</td><td><a href="https://leetcode.com/problems/number-of-islands/">200</a> · <a href="https://leetcode.com/problems/clone-graph/">133</a> · <a href="https://leetcode.com/problems/pacific-atlantic-water-flow/">417</a></td>
+    </tr>
+    <tr>
+      <td align="center">4</td><td>Fri Sep 11</td><td><a href="https://github.com/prdlk/leetcode/issues/19"><strong>17</strong> · Graph BFS</a></td><td align="center">0/2</td><td><a href="https://leetcode.com/problems/rotting-oranges/">994</a> · <a href="https://leetcode.com/problems/word-ladder/">127</a></td>
+    </tr>
+    <tr>
+      <td align="center">5</td><td>Mon Sep 14</td><td><a href="https://github.com/prdlk/leetcode/issues/20"><strong>18</strong> · Topological Sort</a></td><td align="center">0/2</td><td><a href="https://leetcode.com/problems/course-schedule/">207</a> · <a href="https://leetcode.com/problems/course-schedule-ii/">210</a></td>
+    </tr>
+    <tr>
+      <td align="center">5</td><td>Tue Sep 15</td><td><a href="https://github.com/prdlk/leetcode/issues/21"><strong>19</strong> · Union-Find</a></td><td align="center">0/2</td><td><a href="https://leetcode.com/problems/redundant-connection/">684</a> · <a href="https://leetcode.com/problems/number-of-connected-components-in-an-undirected-graph/">323</a></td>
+    </tr>
+    <tr>
+      <td rowspan="5" align="center"><strong>V</strong><br><sub>Decision Space</sub></td>
+      <td align="center">5</td><td>Wed Sep 16</td><td><a href="https://github.com/prdlk/leetcode/issues/22"><strong>20</strong> · Backtracking</a></td><td align="center">0/3</td><td><a href="https://leetcode.com/problems/subsets/">78</a> · <a href="https://leetcode.com/problems/combination-sum/">39</a> · <a href="https://leetcode.com/problems/permutations/">46</a></td>
+    </tr>
+    <tr>
+      <td align="center">5</td><td>Thu Sep 17</td><td><a href="https://github.com/prdlk/leetcode/issues/23"><strong>21</strong> · 1-D Dynamic Programming</a></td><td align="center">0/3</td><td><a href="https://leetcode.com/problems/climbing-stairs/">70</a> · <a href="https://leetcode.com/problems/house-robber/">198</a> · <a href="https://leetcode.com/problems/coin-change/">322</a></td>
+    </tr>
+    <tr>
+      <td align="center">5</td><td>Fri Sep 18</td><td><a href="https://github.com/prdlk/leetcode/issues/24"><strong>22</strong> · Multi-D / Grid DP</a></td><td align="center">0/3</td><td><a href="https://leetcode.com/problems/unique-paths/">62</a> · <a href="https://leetcode.com/problems/minimum-path-sum/">64</a> · <a href="https://leetcode.com/problems/longest-common-subsequence/">1143</a></td>
+    </tr>
+    <tr>
+      <td align="center">6</td><td>Mon Sep 21</td><td><a href="https://github.com/prdlk/leetcode/issues/25"><strong>23</strong> · Greedy</a></td><td align="center">0/3</td><td><a href="https://leetcode.com/problems/maximum-subarray/">53</a> · <a href="https://leetcode.com/problems/jump-game/">55</a> · <a href="https://leetcode.com/problems/gas-station/">134</a></td>
+    </tr>
+    <tr>
+      <td align="center">6</td><td>Tue Sep 22</td><td><a href="https://github.com/prdlk/leetcode/issues/26"><strong>24</strong> · Intervals</a></td><td align="center">0/3</td><td><a href="https://leetcode.com/problems/insert-interval/">57</a> · <a href="https://leetcode.com/problems/merge-intervals/">56</a> · <a href="https://leetcode.com/problems/non-overlapping-intervals/">435</a></td>
+    </tr>
+  </tbody>
+</table>
+
 ## Phase I — Linear Structures (Week 1)
  
 <table>