1 files changed, 26 insertions, 0 deletions
diff --git a/2022/day06/main.c b/2022/day06/main.c
new file mode 100644
index 0000000..5b96fb9
--- /dev/null
+++ b/2022/day06/main.c
@@ -0,0 +1,26 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+int main()
+{
+    char *line = 0;
+    size_t len;
+    ssize_t nlen = getline(&line, &len, stdin);
+    int distinctChars = 4;
+    for (int i = distinctChars -1; i < nlen; i++)
+    {
+        int isTwoEqual = 0;
+        for (int ii = 0; ii < distinctChars; ii++)
+        {
+            for (int iii = 0; iii < distinctChars; iii++)
+            {
+                if (ii == iii) continue;
+                isTwoEqual |= (line[i-ii] == line[i-iii]); 
+            }
+        }
+        if ( !isTwoEqual ) {
+            printf("%d\n", i+1);
+            return 0;
+        }
+    }
+}