Create 952-Largest-Component-Size-by-Common-Factor.cpp

952-Largest-Component-Size-by-Common-Factor.cpp

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+class Solution {
+public:
+    int par[100005];
+    int rank[100005];
+
+    void makeSet(){
+        for(int i = 0; i<100005; i++){
+            par[i] = i;
+            rank[i] = 0;
+        }
+        return ;
+    }
+
+    int findPar(int u){
+        if(par[u] == u) return u;
+        return par[u] = findPar(par[u]);
+    }
+
+    void unionn(int u, int v){
+        u = findPar(u);
+        v = findPar(v);
+        if(u==v) return;
+        if(rank[u] > rank[v]) {
+            par[v] = u;
+        }
+        else if(rank[v] > rank[u]){
+            par[u] = v;
+        }
+        else{
+            rank[u]++;
+            par[v] = u;
+        }
+        return;
+    }
+
+    int largestComponentSize(vector<int>& nums) {
+        makeSet();
+        for(int curr : nums){
+            for(int i = 2; i<=sqrt(curr); i++){
+                if(curr%i==0){
+                    unionn(curr, i);
+                    unionn(curr, curr/i);
+                }
+            }
+        }
+        map<int, int> mp;
+        int ans = 1;
+        for(int i = 0; i<nums.size(); i++){
+            ans = max(ans, ++mp[findPar(nums[i])]);
+        }
+        return ans;
+    }
+};