Merge pull request #3 from ikrommyd/fix-numpy-puzzle-3

fix: numpy puzzle 3 solution

Author: eduardo-rodrigues

site/files/solutions-NO-PEEKING.ipynb

@@ -310,7 +310,7 @@
     {
      "data": {
       "text/plain": [
-       "9564.961050220914"
+       "21.237210568991465"
       ]
      },
      "execution_count": 8,
@@ -319,7 +319,7 @@
     }
    ],
    "source": [
-    "np.sum(np.sqrt((x[1:] - x[-1:])**2 + (y[1:] - y[-1:])**2), axis=0)"
+    "np.sum(np.sqrt((x[1:] - x[:-1])**2 + (y[1:] - y[:-1])**2), axis=0)"
    ]
   },
   {