add day 11 c++

2 files changed, 179 insertions, 0 deletions

diff --git a/day11/part1.cpp b/day11/part1.cpp
new file mode 100644
index 0000000..38bec2f
--- /dev/null
+++ b/day11/part1.cpp
@@ -0,0 +1,87 @@
+#include <array>
+#include <iostream>
+#include <string>
+
+int main()
+{
+    int monkeys[10][100];
+    int ms[10];
+    int ic[10] = {};
+    int idx = -1;
+    std::string im;
+
+    do {
+        std::string line;
+        std::getline(std::cin, line);
+
+        if (!std::cin.eof()) {
+            if (line.starts_with("Monkey")) {
+                ++idx;
+                std::cout << "Monkey " << idx << "..." << std::endl;
+            } else if (line.starts_with("  St")) {
+                auto f = line.find_first_of("0123456789");
+                line = line.substr(f);
+
+                im += (char)stoi(line);
+                
+                auto g = line.find(',');
+                while (g != std::string::npos) {
+                    line = line.substr(g);
+                    auto f = line.find_first_of("0123456789");
+                    line = line.substr(f);
+
+                    im += (char)stoi(line);
+                    g = line.find(',');
+                }
+            } else if (line.starts_with("  Op")) {
+                auto f = line.find('=');
+                char o = line[f + 6];
+                char v = line[f + 8] == 'o' ? 0 : stoi(line.substr(f + 8));
+                im = std::string() + v + o + im;
+            } else if (!line.empty()) {
+                auto f = line.find_first_of("0123456789");
+                line = line.substr(f);
+
+                im = std::string() + (char)stoi(line) + im; 
+            } else {
+                int i = 0;
+                for (auto c : im)
+                    monkeys[idx][i++] = c;
+                ms[idx] = im.size();
+                im.clear();
+            }
+        }
+    } while (!std::cin.eof());
+
+    for (int R = 0; R < 20; ++R) {
+
+    for (int i = 0; i <= idx; ++i) {
+        auto s = monkeys[i];
+        for (int j = 5; j < ms[i]; ++j) {
+            int worry = s[j];
+
+            int o = s[3] != 0 ? s[3] : worry;
+            if (s[4] == '*')
+                worry *= o;
+            else if (s[4] == '+')
+                worry += o;
+
+            worry /= 3;
+
+            int d = worry / s[2];
+            int k = worry == d * s[2] ? s[1] : s[0];
+            monkeys[k][ms[k]++] = worry;
+        }
+        ic[i] += ms[i] - 5;
+        ms[i] = 5;
+    }
+
+    }
+
+    for (int q = 0; q <= idx; ++q) {
+        std::cout << ic[q] << std::endl;
+    }
+
+    return 0;
+}
+
diff --git a/day11/part2.cpp b/day11/part2.cpp
new file mode 100644
index 0000000..fc0a9f4
--- /dev/null
+++ b/day11/part2.cpp
@@ -0,0 +1,92 @@
+#include <array>
+#include <cstdint>
+#include <iostream>
+#include <string>
+
+int main()
+{
+    uint64_t monkeys[10][100];
+    int ms[10];
+    int ic[10] = {};
+    int idx = -1;
+    std::string im;
+
+    do {
+        std::string line;
+        std::getline(std::cin, line);
+
+        if (!std::cin.eof()) {
+            if (line.starts_with("Monkey")) {
+                ++idx;
+                std::cout << "Monkey " << idx << "..." << std::endl;
+            } else if (line.starts_with("  St")) {
+                auto f = line.find_first_of("0123456789");
+                line = line.substr(f);
+
+                im += (char)stoi(line);
+                
+                auto g = line.find(',');
+                while (g != std::string::npos) {
+                    line = line.substr(g);
+                    auto f = line.find_first_of("0123456789");
+                    line = line.substr(f);
+
+                    im += (char)stoi(line);
+                    g = line.find(',');
+                }
+            } else if (line.starts_with("  Op")) {
+                auto f = line.find('=');
+                char o = line[f + 6];
+                char v = line[f + 8] == 'o' ? 0 : stoi(line.substr(f + 8));
+                im = std::string() + v + o + im;
+            } else if (!line.empty()) {
+                auto f = line.find_first_of("0123456789");
+                line = line.substr(f);
+
+                im = std::string() + (char)stoi(line) + im; 
+            } else {
+                int i = 0;
+                for (auto c : im)
+                    monkeys[idx][i++] = c;
+                ms[idx] = im.size();
+                im.clear();
+            }
+        }
+    } while (!std::cin.eof());
+
+    uint64_t supermod = 1;
+    for (int i = 0; i <= idx; ++i)
+        supermod *= monkeys[i][2];
+
+    for (int R = 0; R < 10000; ++R) {
+
+    for (int i = 0; i <= idx; ++i) {
+        auto s = monkeys[i];
+        for (int j = 5; j < ms[i]; ++j) {
+            auto worry = s[j] % supermod;
+
+            auto o = s[3] != 0 ? s[3] : worry;
+            if (s[4] == '*')
+                worry = worry * o;
+            if (s[4] == '+')
+                worry += o;
+
+            //worry /= 3;
+
+            auto d = worry / s[2];
+            auto k = worry == d * s[2] ? s[1] : s[0];
+            monkeys[k][ms[k]++] = worry;
+        }
+        ic[i] += ms[i] - 5;
+        ms[i] = 5;
+    }
+
+    }
+
+    for (int q = 0; q <= idx; ++q) {
+        std::cout << ic[q] << std::endl;
+    }
+
+    return 0;
+}
+