Index: aoc2015.c
==================================================================
--- aoc2015.c
+++ aoc2015.c
@@ -1,12 +1,26 @@
 #include <stdio.h>
+#include "aocdailies.h"
 
 void aoc201501(char *data, size_t len) {
     (void)len; // unused argument
-    int floor = 0;
+    int floor = 0, basementsteps = -1;
+    char *ddata = data;                            // save start
+    while (*data) {
+        if (*data == '(') floor++;
+        else if (*data == ')') floor--;
+        data++;
+        // if entered the basement, part 2 done
+        if (floor == -1) {
+            basementsteps = data - ddata;          // steps taken
+            break;
+        }
+    }
+    // continue with no regard to basement
     while (*data) {
         if (*data == '(') floor++;
         else if (*data == ')') floor--;
         data++;
     }
     printf("Santa is taken to floor {%d}.\n", floor);
+    printf("Santa first goes to the basement at step {%d}.\n", basementsteps);
 }