add day 14 c++

2 files changed, 168 insertions, 0 deletions

diff --git a/day14/part1.cpp b/day14/part1.cpp
new file mode 100644
index 0000000..b95a2aa
--- /dev/null
+++ b/day14/part1.cpp
@@ -0,0 +1,84 @@
+#include <array>
+#include <iostream>
+#include <string>
+
+int consumeInt(std::string& s)
+{
+    int n = 0;
+    int i;
+
+    for (i = 0; s[i] >= '0' && s[i] <= '9'; ++i)
+        n = n * 10 + s[i] - '0';
+
+    s = s.substr(i);
+    return n;
+}
+
+int main()
+{
+    std::array<std::array<char, 101>, 165> map;
+    std::string line;
+
+    for (auto& m : map)
+        m.fill('.');
+
+    while (1) {
+        std::getline(std::cin, line);
+        if (std::cin.eof())
+            break;
+
+        auto px = consumeInt(line);
+        line = line.substr(1);
+        auto py = consumeInt(line);
+
+        while (!line.empty()) {
+            line = line.substr(4);
+            auto x = consumeInt(line);
+            line = line.substr(1);
+            auto y = consumeInt(line);
+
+            if (x != px) {
+                for (auto i = std::min(x, px); i <= std::max(x, px); ++i)
+                    map[y][500 - i + 50] = '#';
+            } else {
+                for (auto i = std::min(y, py); i <= std::max(y, py); ++i)
+                    map[i][500 - x + 50] = '#';
+            }
+
+            px = x;
+            py = y;
+        }
+    }
+
+    int sands = 0;
+    while (map[0][50] != '*') {
+        ++sands;
+        int x = 50, y = 0;
+        while (1) {
+            if (y > map.size() - 2) {
+                map[0][50] = '*';
+                break;
+            } else if (map[y + 1][x] == '.') {
+                ++y;
+            } else if (map[y + 1][x + 1] == '.') {
+                ++y, ++x;
+            } else if (map[y + 1][x - 1] == '.') {
+                ++y, --x;
+            } else {
+                map[y][x] = '*';
+                break;
+            }
+        }
+    }
+
+    for (auto& m : map) {
+        for (auto& n : m)
+            std::cout << n;
+        std::cout << std::endl;
+    }
+
+    std::cout << sands - 1 << std::endl;
+
+    return 0;
+}
+
diff --git a/day14/part2.cpp b/day14/part2.cpp
new file mode 100644
index 0000000..0777395
--- /dev/null
+++ b/day14/part2.cpp
@@ -0,0 +1,84 @@
+#include <array>
+#include <iostream>
+#include <string>
+
+int consumeInt(std::string& s)
+{
+    int n = 0;
+    int i;
+
+    for (i = 0; s[i] >= '0' && s[i] <= '9'; ++i)
+        n = n * 10 + s[i] - '0';
+
+    s = s.substr(i);
+    return n;
+}
+
+int main()
+{
+    std::array<std::array<char, 480>, 165> map;
+    std::string line;
+
+    for (auto& m : map)
+        m.fill('.');
+
+    while (1) {
+        std::getline(std::cin, line);
+        if (std::cin.eof())
+            break;
+
+        auto px = consumeInt(line);
+        line = line.substr(1);
+        auto py = consumeInt(line);
+
+        while (!line.empty()) {
+            line = line.substr(4);
+            auto x = consumeInt(line);
+            line = line.substr(1);
+            auto y = consumeInt(line);
+
+            if (x != px) {
+                for (auto i = std::min(x, px); i <= std::max(x, px); ++i)
+                    map[y][500 - i + map[y].size() / 2] = '#';
+            } else {
+                for (auto i = std::min(y, py); i <= std::max(y, py); ++i)
+                    map[i][500 - x + map[y].size() / 2] = '#';
+            }
+
+            px = x;
+            py = y;
+        }
+    }
+
+    int sands = 0;
+    while (map[0][map[0].size() / 2] != '*') {
+        ++sands;
+        int x = map[0].size() / 2, y = 0;
+        while (1) {
+            if (y > map.size() - 2) {
+                map[y][x] = '*';
+                break;
+            } else if (map[y + 1][x] == '.') {
+                ++y;
+            } else if (map[y + 1][x + 1] == '.') {
+                ++y, ++x;
+            } else if (map[y + 1][x - 1] == '.') {
+                ++y, --x;
+            } else {
+                map[y][x] = '*';
+                break;
+            }
+        }
+    }
+
+    for (auto& m : map) {
+        for (auto& n : m)
+            std::cout << n;
+        std::cout << std::endl;
+    }
+
+    std::cout << sands << std::endl;
+
+    return 0;
+}
+