remove recursion and implement iteratively

sagarpandyansit · abranhe · commit 4fa49887c88f · 2020-11-07T15:09:58.000-05:00
diff --git a/algorithms/dsu/naive_dsu.cpp b/algorithms/dsu/naive_dsu.cpp
@@ -33,11 +33,11 @@ void make_set(int val)
 
 int find_parent(int val)
 {
-    if(val == parent[val])
-    {
-        return val;
+    while (parent[val] != val) {
+        parent[val] = parent[parent[val]];
+        val = parent[val];
     }
-    return find_parent(parent[val]);
+    return val;
 }
 
 void union_set(int x, int y)

Original file line number	Diff line number	Diff line change
`@@ -33,11 +33,11 @@ void make_set(int val)`
`33`	`33`
`34`	`34`	`int find_parent(int val)`
`35`	`35`	`{`
`36`		`- if(val == parent[val])`
`37`		`- {`
`38`		`- return val;`
	`36`	`+ while (parent[val] != val) {`
	`37`	`+ parent[val] = parent[parent[val]];`
	`38`	`+ val = parent[val];`
`39`	`39`	`}`
`40`		`- return find_parent(parent[val]);`
	`40`	`+ return val;`
`41`	`41`	`}`
`42`	`42`
`43`	`43`	`void union_set(int x, int y)`