From 354a81192848ea3f36d87377746484b19286075e Mon Sep 17 00:00:00 2001
From: deadmarshal <adeadmarshal@gmail.com>
Date: Wed, 13 Apr 2022 13:12:22 +0430
Subject: Added challenge 160

---
 challenge-160/deadmarshal/cpp/ch-1.cpp | 32 ++++++++++++++++++++++++++++++++
 challenge-160/deadmarshal/cpp/ch-2.cpp | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 66 insertions(+)
 create mode 100644 challenge-160/deadmarshal/cpp/ch-1.cpp
 create mode 100644 challenge-160/deadmarshal/cpp/ch-2.cpp

(limited to 'challenge-160/deadmarshal/cpp')

diff --git a/challenge-160/deadmarshal/cpp/ch-1.cpp b/challenge-160/deadmarshal/cpp/ch-1.cpp
new file mode 100644
index 0000000000..4db8e75aa7
--- /dev/null
+++ b/challenge-160/deadmarshal/cpp/ch-1.cpp
@@ -0,0 +1,32 @@
+#include<iostream>
+#include<string>
+#include<map>
+
+std::string four_is_magic(int n)
+{
+  std::map<int, std::string> numbers{};
+  std::string ret{};
+  std::string arr[] = {"one","two","three","four","five","six","seven",
+    "eight","nine"};
+  for(int i = 0; i < 9; ++i){
+    numbers[i+1] = arr[i];
+  }
+  size_t len = numbers[n].size();
+  do{
+    ret += numbers[n] + " is " + numbers[len] + ", ";
+    n = len;
+    len = numbers[n].size();
+  }while(n != 4);
+  ret[0] = std::toupper(ret[0]);
+  ret += "four is magic.";
+  return ret;
+}
+
+int main()
+{
+  std::cout << four_is_magic(5) << '\n';
+  std::cout << four_is_magic(7) << '\n';
+  std::cout << four_is_magic(6) << '\n';
+  
+  return 0;
+}
diff --git a/challenge-160/deadmarshal/cpp/ch-2.cpp b/challenge-160/deadmarshal/cpp/ch-2.cpp
new file mode 100644
index 0000000000..79ab7736f6
--- /dev/null
+++ b/challenge-160/deadmarshal/cpp/ch-2.cpp
@@ -0,0 +1,34 @@
+#include<iostream>
+#include<vector>
+#include<numeric>
+
+int equilibrium_index(const std::vector<int>& vec)
+{
+  int left = 0, right = std::accumulate(vec.begin(), vec.end(), 0);
+  int ret = -1;
+  for(std::size_t i = 0; i < vec.size(); ++i)
+  {
+    right -= vec[i];
+    if(left == right)
+    {
+      ret = i;
+      break;
+    }
+    left += vec[i];
+  }
+  return ret;
+}
+
+int main()
+{
+  std::vector<int> vec{1,3,5,7,9};
+  std::cout << equilibrium_index(vec) << '\n';
+
+  vec = {1,2,3,4,5};
+  std::cout << equilibrium_index(vec) << '\n';
+
+  vec = {2,4,2};
+  std::cout << equilibrium_index(vec) << '\n';
+  
+  return 0;
+}
-- 
cgit