diff --git a/cs677/pa2/sequential.cc b/cs677/pa2/sequential.cc
index 8f79c3d..c23b1ff 100644
--- a/cs677/pa2/sequential.cc
+++ b/cs677/pa2/sequential.cc
@@ -45,9 +45,37 @@ void similarityMatrix(vector<char> & s, vector<char> & t)
 {
     int s_size = s.size();
     int t_size = t.size();
-    unsigned int F[s_size][t_size];
+    int F[s_size][t_size];
     for (int i = 0; i < t_size; i++)
         F[0][i] = 0;
     for (int i = 0; i < s_size; i++)
         F[i][0] = 0;
+    for (int i = 1; i < s_size; i++)
+    {
+        for (int j = 1; j < t_size; j++)
+        {
+            F[i][j] =
+                max(
+                    max(
+                        F[i][j-1] - 2,
+                        F[i-1][j-1] + (s[i] == t[j] ? 1 : -1)
+                    ),
+                    max(
+                        F[i-1][j] - 2,
+                        0
+                    )
+                );
+        }
+    }
+#if 0
+    cout << "Matrix: " << s_size << " x " << t_size << endl;
+    for (int i = 0; i < s_size; i++)
+    {
+        for (int j = 0; j < t_size; j++)
+        {
+            printf("%02d ", F[i][j]);
+        }
+        printf("\n");
+    }
+#endif
 }