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RoadConstruction.java

@@ -0,0 +1,94 @@
+package DisJoint;
+
+import java.util.ArrayList;
+import java.util.Scanner;
+public class RoadConstruction {
+
+    int parent[];
+    int size[];
+    int components, maxSize;
+
+    public static class Pair{
+        int compo ,  size;
+
+        public Pair(int compo , int size){
+            this.compo = compo;
+            this.size = size;
+        }
+        public int getFirst(){
+            return compo;
+        }
+        public int getSecond(){
+            return size;
+        }
+
+    }
+
+    public RoadConstruction(int n){
+        parent = new int[n+1];
+        size = new int[n+1];
+
+        for(int i = 0; i <= n; i++){
+            parent[i] = i;
+            size[i] = 1;
+        }
+
+        components = n;
+        maxSize = 1;
+
+    }
+
+    public int findParent(int node){
+        if(node == parent[node]){
+            return node;
+        }
+        return parent[node] = findParent(parent[node]);
+    }
+
+    public void union(int u , int v){
+        int u_p = findParent(u);
+        int v_p = findParent(v);
+
+        if(u_p == v_p){
+            return;
+        }
+        if(size[u_p] < size[v_p]){
+            parent[u_p] = v_p;
+            size[v_p] += size[u_p];
+            maxSize = Math.max(maxSize, size[v_p]);
+        }else{
+            parent[v_p] = u_p;
+            size[u_p] += size[v_p];
+            maxSize = Math.max(maxSize, size[u_p]);
+        }
+        components--;
+    }
+
+    public static void main(String[] args) {
+
+        Scanner sc = new Scanner(System.in);
+
+        ArrayList<Pair> ans = new ArrayList<>();
+
+        int n = sc.nextInt();
+
+        RoadConstruction rc = new RoadConstruction(n);
+
+        int m = sc.nextInt();
+
+        for(int i = 0; i < m; i++){
+            int u = sc.nextInt();
+            int v = sc.nextInt();
+
+            rc.union(u, v);
+
+            // System.out.println(rc.components + " " + rc.maxSize);
+            ans.add(new Pair(rc.components, rc.maxSize));
+        }
+
+        for (Pair result : ans) {
+            System.out.println(result.getFirst() + " " + result.getSecond());
+        }
+
+    }
+}