day01

1 files changed, 30 insertions, 0 deletions

diff --git a/day01.cc b/day01.cc
new file mode 100644
index 0000000..90a597f
--- /dev/null
+++ b/day01.cc
@@ -0,0 +1,30 @@
+#include <algorithm>
+#include <iostream>
+#include <functional>
+
+int main()
+{
+	std::string d;
+	std::cin >> d;
+
+	d.push_back(d[0]);
+	int s = 0;
+	for (auto i{d.cbegin()};
+	     (i = std::adjacent_find(i, d.cend())) != d.cend();
+	     i++) {
+		s += *i - '0';
+	}
+        std::cout << s << std::endl;
+
+	auto d1{d.cbegin()};
+	auto mid{d1 + d.size()/2 - 1};
+	auto d2{mid + 1};
+	s = 0;
+	for (auto p{std::mismatch(d1, mid, d2, std::not_equal_to<char>())};
+	     p.first != mid;
+	     p = std::mismatch(++p.first, mid, ++p.second, std::not_equal_to<char>()))
+		s += *p.first - '0';
+        std::cout << 2*s << std::endl;
+
+	return 0;
+}