[main] Added functions

Author: cthacker-udel

cppProblems/exp_sum/expsum.cpp

@@ -0,0 +1,20 @@
+using ull = unsigned long long;
+
+ull exp_sum(unsigned int n)
+{
+    if (n == 0)
+    {
+        return 0;
+    }
+    unsigned long long result = 1;
+    for (int i = 1; i < n; i++)
+    {
+        result *= 1 / 1 - pow(n, i);
+    }
+    return result;
+}
+
+int main(void)
+{
+    exp_sum(5);
+}

pythonProblems/xor/xor.py

@@ -0,0 +1,2 @@
+def xor(a, b):
+    return (a and not b) or (not a and b)