Create Day27.cpp

Author: starwiz-7

Day27.cpp

@@ -0,0 +1,38 @@
+/*
+    Author: Aryan Yadav
+    Possible Bipartition
+
+    Algorithm: DFS
+    Difficulty: Hard   
+*/
+
+class Solution {
+public:
+    
+    bool possibleBipartition(int N, vector<vector<int>>& dislikes) {
+        g = vector<vector<int>>(N);
+        for( const auto& d:dislikes){
+            g[d[0] -1].push_back(d[1]-1);
+            g[d[1] -1].push_back(d[0]-1);
+        }
+        colors = vector<int>(N,0);
+        for(int i=0;i<N;i++){
+            if(colors[i] == 0 && !dfs(i,1))
+                return false;
+        }
+        return true;
+    }
+private:
+    vector<vector<int>>g;
+    vector<int>colors;
+    bool dfs(int cur, int color){
+        colors[cur] = color;
+        for(int nxt:g[cur]){
+            if (colors[nxt] == color)
+                return false;
+            if(colors[nxt] == 0 && !dfs(nxt, -color))
+                return false;
+        }
+        return true;
+    }
+};