day7

2024-12-07 17:31:41 -05:00 · 2024-12-07 17:31:41 -05:00 · 0b080eacb4
parent 1d116e7c15
commit 0b080eacb4
8 changed files with 1098 additions and 1 deletions
--- a/.idea/vcs.xml
+++ b/.idea/vcs.xml
@ -3,5 +3,6 @@
  <component name="VcsDirectoryMappings">
    <mapping directory="" vcs="Git" />
    <mapping directory="$PROJECT_DIR$/lib/blt" vcs="Git" />
+    <mapping directory="$PROJECT_DIR$/lib/blt/libraries/parallel-hashmap" vcs="Git" />
  </component>
 </project>
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.25)
-project(Advent-Of-Code-2024 VERSION 0.0.5)
+project(Advent-Of-Code-2024 VERSION 0.0.6)

 option(ENABLE_ADDRSAN "Enable the address sanitizer" OFF)
 option(ENABLE_UBSAN "Enable the ub sanitizer" OFF)
--- a/include/day8.h
+++ b/include/day8.h
@ -0,0 +1,24 @@
+#pragma once
+/*
+ *  Copyright (C) 2024  Brett Terpstra
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DAY8_H
+#define DAY8_H
+
+void run_day8();
+
+#endif //DAY8_H
--- a/problems/day7/example
+++ b/problems/day7/example
@ -0,0 +1,9 @@
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--- a/problems/day7/input
+++ b/problems/day7/input
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--- a/src/day7.cpp
+++ b/src/day7.cpp
@ -20,6 +20,7 @@
 #include <vector>
 #include <limits>
 #include <algorithm>
+#include <stack>
 #include <blt/fs/loader.h>
 #include <blt/iterator/enumerate.h>
 #include <blt/iterator/iterator.h>
@ -28,6 +29,183 @@
 #include <blt/math/vectors.h>
 #include <blt/std/assert.h>

+struct test_case_t
+{
+    blt::i64 calibration;
+    std::vector<blt::i64> values;
+};
+
+enum class operator_t
+{
+    PLUS, MULTIPLY, CONCAT
+};
+
+struct operation_t
+{
+    const test_case_t* test_case;
+    std::vector<operator_t> operators;
+
+    explicit operation_t(const test_case_t* test_case): test_case(test_case)
+    {
+        for (blt::size_t i = 0; i < test_case->values.size() - 1; ++i)
+            operators.push_back(operator_t::PLUS);
+    }
+
+    [[nodiscard]] bool valid() const
+    {
+        std::stack<blt::i64> value_stack;
+
+        for (const auto v : blt::iterate(test_case->values).rev())
+            value_stack.push(v);
+
+        for (const auto op : operators)
+        {
+            const auto a = value_stack.top();
+            value_stack.pop();
+            const auto b = value_stack.top();
+            value_stack.pop();
+
+            switch (op)
+            {
+            case operator_t::PLUS:
+                value_stack.push(a + b);
+                break;
+            case operator_t::MULTIPLY:
+                value_stack.push(a * b);
+                break;
+            case operator_t::CONCAT:
+                value_stack.push(std::stoll(std::to_string(a) + std::to_string(b)));
+                break;
+            }
+        }
+
+        return test_case->calibration == value_stack.top();
+    }
+
+    bool next()
+    {
+        bool carry = false;
+        for (blt::size_t i = 0; i < operators.size(); i++)
+        {
+            if (carry && operators[i] == operator_t::MULTIPLY)
+            {
+                if (i == operators.size() - 1)
+                    return false;
+                operators[i] = operator_t::PLUS;
+            }
+            else if (carry && operators[i] == operator_t::PLUS)
+            {
+                operators[i] = operator_t::MULTIPLY;
+                break;
+            }
+            else if (operators[i] == operator_t::PLUS)
+            {
+                operators[i] = operator_t::MULTIPLY;
+                break;
+            }
+            else if (operators[i] == operator_t::MULTIPLY)
+            {
+                if (i == operators.size() - 1)
+                    return false;
+                carry = true;
+                operators[i] = operator_t::PLUS;
+            }
+            else
+            {
+                BLT_INFO("I don't think this state is possible");
+            }
+        }
+        return true;
+    }
+
+    bool next2()
+    {
+        bool carry = false;
+        for (blt::size_t i = 0; i < operators.size(); i++)
+        {
+            if (carry && operators[i] == operator_t::CONCAT)
+            {
+                if (i == operators.size() - 1)
+                    return false;
+                operators[i] = operator_t::PLUS;
+            }
+            else if (operators[i] == operator_t::PLUS)
+            {
+                operators[i] = operator_t::MULTIPLY;
+                break;
+            }
+            else if (operators[i] == operator_t::MULTIPLY)
+            {
+                operators[i] = operator_t::CONCAT;
+                break;
+            }
+            else if (operators[i] == operator_t::CONCAT)
+            {
+                if (i == operators.size() - 1)
+                    return false;
+                carry = true;
+                operators[i] = operator_t::PLUS;
+            }
+            else
+            {
+                BLT_INFO("I don't think this state is possible");
+            }
+        }
+        return true;
+    }
+};
+
 void run_day7()
 {
+    const auto file = blt::fs::getLinesFromFile("../problems/day7/input");
+
+    std::vector<test_case_t> test_cases;
+
+    for (const auto& line : file)
+    {
+        test_case_t test;
+        auto data = blt::string::split(line, ":");
+        test.calibration = std::stoll(data[0]);
+        auto values = blt::string::split(data[1], ' ');
+        for (const auto& value : values)
+            test.values.push_back(std::stoll(value));
+        test_cases.emplace_back(std::move(test));
+    }
+
+    blt::i64 valid_test_case_sum = 0;
+
+    for (const auto& test : test_cases)
+    {
+        operation_t op{&test};
+        do
+        {
+            if (op.valid())
+            {
+                BLT_TRACE("Valid test case found! %ld", test.calibration);
+                valid_test_case_sum += test.calibration;
+                break;
+            }
+        }
+        while (op.next());
+    }
+
+    blt::i64 valid_test_cases_sum2 = 0;
+
+    for (const auto& test : test_cases)
+    {
+        operation_t op{&test};
+        do
+        {
+            if (op.valid())
+            {
+                BLT_TRACE("Valid test case found! %ld", test.calibration);
+                valid_test_cases_sum2 += test.calibration;
+                break;
+            }
+        }
+        while (op.next2());
+    }
+
+    BLT_INFO("test_case_sum %ld", valid_test_case_sum);
+    BLT_INFO("test_case_sum2 %ld", valid_test_cases_sum2);
 }
--- a/src/day8.cpp
+++ b/src/day8.cpp
@ -0,0 +1,33 @@
+/*
+ *  <Short Description>
+ *  Copyright (C) 2024  Brett Terpstra
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+#include <day8.h>
+#include <blt/math/log_util.h>
+#include <vector>
+#include <limits>
+#include <algorithm>
+#include <blt/fs/loader.h>
+#include <blt/iterator/enumerate.h>
+#include <blt/iterator/iterator.h>
+#include <blt/iterator/zip.h>
+#include <blt/std/hashmap.h>
+#include <blt/math/vectors.h>
+#include <blt/std/assert.h>
+
+void run_day8()
+{
+}
--- a/src/main.cpp
+++ b/src/main.cpp
@ -7,6 +7,7 @@
 #include <day5.h>
 #include <day6.h>
 #include <day7.h>
+#include <day8.h>

 int main(const int argc, const char** argv)
 {
@ -46,6 +47,7 @@ int main(const int argc, const char** argv)
        run_day7();
        break;
    case 8:
+        run_day8();
        break;
    default:
        BLT_INFO("%d is not a day", day);