DFS complexity added

Author: sayedulsayem

data/algorithm-complexity.json

@@ -895,6 +895,26 @@
                     "code": "O(|V|+ |E|)"
                 }
             ]
+        } ,
+        {
+            "title": "ডেপ্ত ফার্স্ট সার্চ (DFS) ট্রি",
+            "items": [{
+                "definition": "গড়",
+                "code": "O(|V|+ |E|)"
+            },
+            {
+                "definition": "সবচেয়ে ভাল",
+                "code": "O(|1|+ |E|)"
+            },
+            {
+                "definition": "সবচেয়ে খারাপ",
+                "code": "O(|V|^2+ |E|)"
+            },
+            {
+                "definition": "স্পেস কমপ্লেক্সিটি",
+                "code": "O(|V|)"
+            }
+            ]
         }
     ]
 }