fix: merge conflict

graph/connected_components_with_dsu.cpp

@@ -10,8 +10,11 @@
  * 1. Depth first search
  * 2. Disjoint union
  * 1st option is inefficient, Disjoint union is the most optimal way to find this.
+ *
+ * @author Unknown author
+ * @author [Sagar Pandya](https://github.com/sagarpandyansit)
  */
-#include <iostream> /// for io operations
+#include <iostream> /// for IO operations
 #include <set>    /// for std::set
 #include <vector> /// for std::vector
 
@@ -20,28 +23,26 @@
  * @brief Graph Algorithms
  */
 namespace graph {
-
 /**
  * @namespace disjoint_union
- * @brief Function for [Disjoint union] (https://en.wikipedia.org/wiki/Disjoint_union) implementation
+ * @brief Functions for [Disjoint union](https://en.wikipedia.org/wiki/Disjoint_union) implementation
  */
 namespace disjoint_union {
-
-int64_t number_of_nodes;                  // denotes number of nodes
-std::vector<int64_t> parent;              // parent of each node
-std::vector<int64_t> connected_set_size;  // size of each set
+uint32_t number_of_nodes = 0;                // denotes number of nodes
+std::vector<int64_t> parent{};               // parent of each node
+std::vector<uint32_t> connected_set_size{};  // size of each set
 /**
  * @brief function the initialize every node as it's own parent
  * @returns void
  */
 void make_set() {
-    for (int64_t i = 1; i <= number_of_nodes; i++) {
+    for (uint32_t i = 1; i <= number_of_nodes; i++) {
         parent[i] = i;
         connected_set_size[i] = 1;
     }
 }
 /**
- * @brief To find the component where following node belongs to
+ * @brief Find the component where following node belongs to
  * @param val parent of val should be found
  * @return parent of val
  */
@@ -53,7 +54,7 @@ int64_t find_set(int64_t val) {
     return val;
 }
 /**
- * @brief To join 2 components to belong to one
+ * @brief Merge 2 components to become one
  * @param node1 1st component
  * @param node2 2nd component
  * @returns void
@@ -73,40 +74,42 @@ void union_sets(int64_t node1, int64_t node2) {
     }
 }
 /**
- * @brief To find total no of connected components
+ * @brief Find total no. of connected components
  * @return Number of connected components
  */
-int64_t no_of_connected_components() {
+uint32_t no_of_connected_components() {
     std::set<int64_t> temp;  // temp set to count number of connected components
-    for (int64_t i = 1; i <= number_of_nodes; i++) temp.insert(find_set(i));
+    for (uint32_t i = 1; i <= number_of_nodes; i++) temp.insert(find_set(i));
     return temp.size();  // return the size of temp set
 }
+}  // namespace disjoint_union
+}  // namespace graph
+
 /**
  * @brief Test Implementations
  * @returns void
  */
 static void test() {
-    std::cin >> number_of_nodes;
-    parent.resize(number_of_nodes + 1);
-    connected_set_size.resize(number_of_nodes + 1);
-    make_set();
-    int64_t edges = 0;
+    namespace dsu = graph::disjoint_union;
+    std::cin >> dsu::number_of_nodes;
+    dsu::parent.resize(dsu::number_of_nodes + 1);
+    dsu::connected_set_size.resize(dsu::number_of_nodes + 1);
+    dsu::make_set();
+    uint32_t edges = 0;
     std::cin >> edges;  // no of edges in the graph
     while (edges--) {
         int64_t node_a = 0, node_b = 0;
         std::cin >> node_a >> node_b;
-        union_sets(node_a, node_b);
+        dsu::union_sets(node_a, node_b);
     }
-    std::cout << no_of_connected_components() << std::endl;
+    std::cout << dsu::no_of_connected_components() << std::endl;
 }
-} // namespace disjoint_union
-} // namespace graph
 
 /**
  * @brief Main function
  * @returns 0 on exit
  */
 int main() {
-    graph::disjoint_union::test();  // Execute the tests
+    test();  // Execute the tests
     return 0;
 }