a lot of changes

.gitignore

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+*.cast

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.27)
+project(hw)
+
+set(CMAKE_CXX_STANDARD 17)
+
+add_executable(hw main.cpp)

README.md

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+

main.cpp

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+#include <stdlib.h>
+#include <iostream>
+
+using namespace std;
+
+# Это мейн
+int main() {
+	int a = 1;
+	int b = 2;
+	int c = a + b;
+	return 0;
+}
+