solution for the commit

Author: sidoncode

41A.cpp

@@ -0,0 +1,18 @@
+#include<iostream>
+#include<string>
+#include<algorithm>
+
+using namespace std;
+
+int main(){
+    string s1,s2;
+    cin>>s1;
+    cin>>s2;
+    reverse(s2.begin(),s2.end());
+    if(s1 == s2){
+        cout<<"YES"<<endl;
+    }
+    else{
+        cout<<"NO"<<endl;
+    }
+}

4C.cpp

@@ -0,0 +1,28 @@
+#include<iostream>
+#include<algorithm>
+#include<map>
+
+using namespace std;
+
+
+string s[100010];
+map <string,int> mp;
+
+int main(){
+    int n;
+    cin >> n;
+    for (int i = 0; i < n; i++)
+    {
+        cin >> s[i];
+        if (mp.find(s[i]) == mp.end())
+        {
+            printf("OK\n");
+            mp[s[i]] = 1;
+        }
+        else
+        {
+            cout << s[i] << mp[s[i]] << endl;
+            mp[s[i]]++;
+        }
+    } 
+}