day 6, advent of code 2022

1 files changed, 36 insertions, 0 deletions

diff --git a/2022/src/day06.cpp b/2022/src/day06.cpp
new file mode 100644
index 0000000..44d5dc2
--- /dev/null
+++ b/2022/src/day06.cpp
@@ -0,0 +1,36 @@
+#include <fstream>
+#include <iostream>
+#include <numeric>
+#include <sstream>
+#include <string>
+#include <vector>
+#include <set>
+using namespace std;
+
+string
+read_file(string_view filename)
+{
+        fstream input{ filename };
+        return { istreambuf_iterator<char>{ input }, {} };
+}
+
+void
+solve(const string& data, size_t length)
+{
+        for ( size_t i = 0; i != data.length() - length; ++i ) {
+                const auto substr = data.substr(i, length);
+                set<char> set(begin(substr), end(substr));
+                if (set.size() == length) {
+                        cout << i + length << endl;
+                        break;
+                }
+        }
+}
+
+int
+main()
+{
+        const auto data = read_file("data/day06.txt");
+        solve(data, 4);
+        solve(data, 14);
+}