1 files changed, 60 insertions, 0 deletions
diff --git a/day10/both.cpp b/day10/both.cpp
new file mode 100644
index 0000000..c51ef36
--- /dev/null
+++ b/day10/both.cpp
@@ -0,0 +1,60 @@
+#include <algorithm>
+#include <iostream>
+#include <string>
+#include <tuple>
+#include <vector>
+
+int main()
+{
+    std::vector<std::pair<char, int>> steps;
+
+    while (1) {
+        std::string line;
+        std::getline(std::cin, line);
+        if (std::cin.eof())
+            break;
+
+        int n = line.size() < 6 ? 0 : stoi(line.substr(5));
+        steps.emplace_back(line.front(), n);
+    }
+
+    int cx = 0;
+
+    int cycle = 1;
+    int adding = 0;
+    int X = 1;
+    int strength = 0;
+    for (int i = 0; i < steps.size();) {
+        const auto& [ins, n] = steps[i];
+
+        if (abs(X - cx) < 2)
+            std::cout << '#';
+        else
+            std::cout << '.';
+
+        if (++cx == 40) {
+            std::cout << std::endl;
+            cx = 0;
+        }
+
+        ++cycle;
+
+        if (adding != 0) {
+            X += adding;
+            adding = 0;
+            ++i;
+        } else if (ins == 'a') {
+            adding = n;
+        } else if (ins == 'n') {
+            ++i;
+        }
+
+        if ((cycle - 20) % 40 == 0)
+            strength += cycle * X;
+    }
+
+    std::cout << "strength: " << strength << std::endl;
+
+    return 0;
+}
+