From e27f2cd01cc63ab0f03face43ff394b0fe9e3218 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=9C=D0=BE=D1=80=D0=B5=D0=B2=20=D0=90=D0=BB=D0=B5=D0=BA?=
 =?UTF-8?q?=D1=81=D0=B0=D0=BD=D0=B4=D1=80?= <hikjik@yandex.ru>
Date: Fri, 20 Oct 2023 10:25:21 +0300
Subject: [PATCH] Final Value of Variable After Performing Operations

---
 CMakeLists.txt                                |  1 +
 .../CMakeLists.txt                            |  1 +
 .../solution.hpp                              | 16 ++++++++++
 .../test.cpp                                  | 30 +++++++++++++++++++
 4 files changed, 48 insertions(+)
 create mode 100644 solutions/final-value-of-variable-after-performing-operations/CMakeLists.txt
 create mode 100644 solutions/final-value-of-variable-after-performing-operations/solution.hpp
 create mode 100644 solutions/final-value-of-variable-after-performing-operations/test.cpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e9dc0d65..89810724 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -219,6 +219,7 @@ add_task(factorial-trailing-zeroes)
 add_task(fair-distribution-of-cookies)
 add_task(faulty-keyboard)
 add_task(fibonacci-number)
+add_task(final-value-of-variable-after-performing-operations)
 add_task(find-a-peak-element-ii)
 add_task(find-all-anagrams-in-a-string)
 add_task(find-all-lonely-numbers-in-the-array)
diff --git a/solutions/final-value-of-variable-after-performing-operations/CMakeLists.txt b/solutions/final-value-of-variable-after-performing-operations/CMakeLists.txt
new file mode 100644
index 00000000..7a9a5cbd
--- /dev/null
+++ b/solutions/final-value-of-variable-after-performing-operations/CMakeLists.txt
@@ -0,0 +1 @@
+add_catch(test_final_value_of_variable_after_performing_operations test.cpp)
diff --git a/solutions/final-value-of-variable-after-performing-operations/solution.hpp b/solutions/final-value-of-variable-after-performing-operations/solution.hpp
new file mode 100644
index 00000000..8decbf22
--- /dev/null
+++ b/solutions/final-value-of-variable-after-performing-operations/solution.hpp
@@ -0,0 +1,16 @@
+#pragma once
+
+#include <string>
+#include <vector>
+
+class Solution {
+public:
+  static int
+  finalValueAfterOperations(const std::vector<std::string> &operations) {
+    int x = 0;
+    for (const auto &op : operations) {
+      x += op[1] == '+' ? 1 : -1;
+    }
+    return x;
+  }
+};
diff --git a/solutions/final-value-of-variable-after-performing-operations/test.cpp b/solutions/final-value-of-variable-after-performing-operations/test.cpp
new file mode 100644
index 00000000..8b3bd8a2
--- /dev/null
+++ b/solutions/final-value-of-variable-after-performing-operations/test.cpp
@@ -0,0 +1,30 @@
+#include <catch.hpp>
+
+#include <solution.hpp>
+
+TEST_CASE("Simple") {
+  struct TestCase {
+    std::vector<std::string> operations;
+    int expected;
+  };
+
+  std::vector<TestCase> test_cases{
+      {
+          .operations{"--X", "X++", "X++"},
+          .expected = 1,
+      },
+      {
+          .operations{"++X", "++X", "X++"},
+          .expected = 3,
+      },
+      {
+          .operations{"X++", "++X", "--X", "X--"},
+          .expected = 0,
+      },
+  };
+
+  for (const auto &[operations, expected] : test_cases) {
+    const auto actual = Solution::finalValueAfterOperations(operations);
+    REQUIRE(expected == actual);
+  }
+}