diff --git a/Dsa/NumberofDistinctIsland.cpp b/Dsa/NumberofDistinctIsland.cpp
new file mode 100644
index 0000000..2a6d311
--- /dev/null
+++ b/Dsa/NumberofDistinctIsland.cpp
@@ -0,0 +1,37 @@
+// Number of Distinct Islands 
+// GFG
+class Solution {
+  public:
+  void helper(vector<vector<int>> &grid,int i,int j,string &st){
+if(i<0 || j<0 || i>=grid.size() || j>=grid[0].size() || grid[i][j]==0)return ;
+      grid[i][j]=0;
+      st=st+"d";
+      helper(grid,i+1,j,st);
+      st=st+"u";
+      helper(grid,i-1,j,st);
+      st=st+"r";
+      helper(grid,i,j+1,st);
+      st=st+"l";
+      helper(grid,i,j-1,st);
+  }
+    int countDistinctIslands(vector<vector<int>>& grid) {
+        // code here
+        int count=0;
+ int n=grid.size();
+ int m=grid[0].size();
+ unordered_map<string,int> mp;
+ for(int i=0;i<n;i++){
+      for(int j=0;j<m;j++){
+          if(grid[i][j]==1){
+             string st="";
+             helper(grid,i,j,st);
+             if(mp.find(st)==mp.end()){
+                  count++;    
+              }
+              mp[st]++;
+           }
+      }
+  }
+  return count;
+    }
+};