solved group anagrams problem

solutions/group_anagrams.cpp

@@ -0,0 +1,33 @@
+// problem link: 
+
+#include<bits/stdc++.h>
+#include<unordered_map>
+
+using namespace std;
+
+class Solution {
+public:
+    vector<vector<string> > groupAnagrams(vector<string>& words) {
+    unordered_map<string, vector<string>> umap;
+    for (string word: words) {
+      string copy = "";
+      for (char ch: word) copy.push_back(ch);
+      sort(copy.begin(), copy.end());
+      if (umap.find(copy) != umap.end()) {
+        umap[copy].push_back(word);
+      } else {
+        umap[copy] = { word };
+      }
+    }
+    vector<vector<string> > ans;
+    for(auto p: umap) {
+      ans.push_back(p.second);
+    }
+    return ans;
+  }
+};
+
+int main() {
+  Solution s;
+
+}