Fuck you Logan

day_1/main.cpp

@@ -0,0 +1,41 @@
+#include <iostream>
+#include <fstream>
+#include <string>
+#include <vector>
+#include <algorithm>
+
+
+int main(int argc, char *argv[]) {
+    if(argc != 2) {
+        std::cerr << "Usage " << argv[0] << " <input>" << std::endl;
+        return -1;
+    }
+
+    std::ifstream file;
+    file.open(argv[1]);
+
+    std::string line;
+    std::vector<int> groups;
+    int sum = 0;
+    while(file) {
+        std::getline(file, line);
+        std::cout << "got " << line << std::endl;
+
+        if(line == "") {
+            if(sum > 0)
+                groups.push_back(sum);
+            sum = 0;
+        } else {
+            sum += std::stoi(line);
+        }
+    }
+
+    for(int sum : groups) {
+        std::cout << "sum " << sum << std::endl;
+    }
+    std::cout << "Parsed " << groups.size() << " groups" << std::endl;
+
+    std::cout << "Max is " << *std::max_element(groups.begin(), groups.end()) << std::endl;
+
+    return 0;
+}

day_1/main2.cpp

@@ -0,0 +1,52 @@
+#include <iostream>
+#include <fstream>
+#include <string>
+#include <vector>
+#include <algorithm>
+
+
+int main(int argc, char *argv[]) {
+    if(argc != 2) {
+        std::cerr << "Usage " << argv[0] << " <input>" << std::endl;
+        return -1;
+    }
+
+    std::ifstream file;
+    file.open(argv[1]);
+
+    std::string line;
+    std::vector<int> groups;
+    int sum = 0;
+    while(file) {
+        std::getline(file, line);
+        std::cout << "got " << line << std::endl;
+
+        if(line == "") {
+            if(sum > 0)
+                groups.push_back(sum);
+            sum = 0;
+        } else {
+            sum += std::stoi(line);
+        }
+    }
+
+    for(int sum : groups) {
+        std::cout << "sum " << sum << std::endl;
+    }
+    std::cout << "Parsed " << groups.size() << " groups" << std::endl;
+
+    int maxs[3];
+    auto max = std::max_element(groups.begin(), groups.end());
+    maxs[0] = *max;
+    groups.erase(max);
+    max = std::max_element(groups.begin(), groups.end());
+    maxs[1] = *max;
+    groups.erase(max);
+    max = std::max_element(groups.begin(), groups.end());
+    maxs[2] = *max;
+    groups.erase(max);
+
+    std::cout << "Max is " << maxs[0] + maxs[1] + maxs[2] << std::endl;
+
+    return 0;
+}

day_2/main.cpp

@@ -0,0 +1,107 @@
+#include <utility>
+#include <iostream>
+#include <fstream>
+#include <vector>
+
+
+enum class Play : int {
+    FUCKYOU = 0,
+    ROCK = 1,
+    PAPER = 2,
+    SCISSORS = 3,
+};
+
+enum class Result : char {
+    WIN = 'W',
+    LOSS = 'L',
+    TIE = 'T',
+};
+
+
+typedef std::pair<Play, Play> game_t;
+
+
+Play char_to_play(char c) {
+    switch(c) {
+        case 'A':
+        case 'X':
+            return Play::ROCK;
+        case 'B':
+        case 'Y':
+            return Play::PAPER;
+        case 'C':
+        case 'Z':
+            return Play::SCISSORS;
+    }
+
+    return Play::FUCKYOU;
+}
+
+
+std::vector<game_t> read_file(std::string path) {
+    std::fstream file;
+    file.open(path);
+
+    std::string line;
+    std::vector<game_t> games;
+    while(file) {
+        std::getline(file, line);
+        if(line == "")
+            break;
+
+        auto opponent = char_to_play(line[0]);
+        auto mine = char_to_play(line[2]);
+
+        games.push_back(std::make_pair(opponent, mine));
+    }
+
+    return games;
+}
+
+
+Result judge_game(game_t game) {
+    auto [opponent, me] = game;
+    if(opponent == me)
+        return Result::TIE;
+    if(opponent == Play::ROCK && me == Play::SCISSORS)
+        return Result::LOSS;
+    if(opponent == Play::SCISSORS && me == Play::ROCK)
+        return Result::WIN;
+    if((int)opponent > (int)me)
+        return Result::LOSS;
+    else
+        return Result::WIN;
+}
+
+int score_game(game_t game, Result result) {
+    int score = 0;
+    if(result == Result::WIN)
+        score = 6;
+    else if(result == Result::TIE)
+        score = 3;
+
+    score += (int)game.second;
+
+    return score;
+}
+
+
+int main(int argc, char *argv[]) {
+    auto games = read_file(argv[1]);
+
+    int total = 0;
+
+    for(auto game : games) {
+        auto [opponent, me] = game;
+        std::cout << (int)opponent << " " << (int)me << std::endl;
+        auto result = judge_game(game);
+        std::cout << (char)result << std::endl;
+        int score = score_game(game, result);
+        std::cout << score << std::endl;
+        total += score;
+    }
+
+    std::cout << total << std::endl;
+
+    return 0;
+}

day_2/main2.cpp

@@ -0,0 +1,116 @@
+#include <utility>
+#include <iostream>
+#include <fstream>
+#include <vector>
+
+
+enum class Play : int {
+    ROCK = 1,
+    PAPER = 2,
+    SCISSORS = 3,
+};
+
+enum class Result : char {
+    WIN = 'W',
+    LOSS = 'L',
+    TIE = 'T',
+};
+
+
+typedef std::pair<Play, Result> game_t;
+
+
+Play char_to_play(char c) {
+    switch(c) {
+        case 'A':
+            return Play::ROCK;
+        case 'B':
+            return Play::PAPER;
+        case 'C':
+            return Play::SCISSORS;
+    }
+    throw;
+}
+
+Result char_to_result(char c) {
+    switch(c) {
+        case 'X':
+            return Result::LOSS;
+        case 'Y':
+            return Result::TIE;
+        case 'Z':
+            return Result::WIN;
+    }
+    throw;
+}
+
+Play cheat(Play opponent, Result result) {
+    if(result == Result::WIN) {
+        if(opponent == Play::ROCK)     return Play::PAPER;
+        if(opponent == Play::PAPER)    return Play::SCISSORS;
+        if(opponent == Play::SCISSORS) return Play::ROCK;
+    } else if(result == Result::LOSS) {
+        if(opponent == Play::ROCK)     return Play::SCISSORS;
+        if(opponent == Play::PAPER)    return Play::ROCK;
+        if(opponent == Play::SCISSORS) return Play::PAPER;
+    } else {
+        return opponent;
+    }
+    throw;
+}
+
+
+std::vector<game_t> read_file(std::string path) {
+    std::fstream file;
+    file.open(path);
+
+    std::string line;
+    std::vector<game_t> games;
+    while(file) {
+        std::getline(file, line);
+        if(line == "")
+            break;
+
+        auto opponent = char_to_play(line[0]);
+        auto mine = char_to_result(line[2]);
+
+        games.push_back(std::make_pair(opponent, mine));
+    }
+
+    return games;
+}
+
+
+int score_game(Play play, Result result) {
+    int score = 0;
+    if(result == Result::WIN)
+        score = 6;
+    else if(result == Result::TIE)
+        score = 3;
+
+    score += (int)play;
+
+    return score;
+}
+
+
+int main(int argc, char *argv[]) {
+    auto games = read_file(argv[1]);
+
+    int total = 0;
+
+    for(auto game : games) {
+        auto [opponent, result] = game;
+
+        auto me = cheat(opponent, result);
+
+        std::cout << (int)opponent << " " << (int)me << std::endl;
+        int score = score_game(me, result);
+        std::cout << score << std::endl;
+        total += score;
+    }
+
+    std::cout << total << std::endl;
+
+    return 0;
+}