Some basic ques'

Author: phoenixx1

CodeForces/271A-Beautiful Year.cpp

@@ -0,0 +1,25 @@
+#include <bits/stdc++.h>
+using namespace std;
+
+int main()
+{
+    int x;
+    cin >> x;
+    for (int j = x + 1; j < 9020; j++)
+    {
+        set<int> st;
+        int num = j;
+        while (num != 0)
+        {
+            st.insert(num % 10);
+            num = num / 10;
+        }
+        if (st.size() == 4)
+        {
+            cout << j;
+            break;
+        }
+    }
+    cout << "";
+    return 0;
+}

CodeForces/443A-Anton and Letters.cpp

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+#include <bits/stdc++.h>
+using namespace std;
+
+int main()
+{
+    char x;
+    set<char> st;
+    while (cin >> x)
+    {
+        if (isalpha(x))
+            st.insert(x);
+    }
+    cout << st.size();
+    return 0;
+}

CodeForces/61A-Ultra-Fast Mathematician.cpp

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+#include <bits/stdc++.h>
+using namespace std;
+
+int main()
+{
+    string n1, n2;
+    cin >> n1 >> n2;
+    string ans = "";
+    for (int i = 0; i < n1.size(); i++)
+    {
+        if (n1[i] == n2[i])
+        {
+            ans += "0";
+        }
+        else
+        {
+            ans += "1";
+        }
+    }
+    cout << ans;
+    return 0;
+}