Finished aoc day 5 part 1

advent_of_code/2022/5/main.cpp

@@ -0,0 +1,113 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+vector<stack<char>> parse_crate_stack(const vector<string>& crate_text){
+    int number_of_piles = (crate_text[0].length() - 3) / 4 + 1;
+    int start_pile_height = crate_text.size() - 1;
+
+    // cout << number_of_piles << " " << start_pile_height << endl;
+
+    vector<stack<char>> crate_stack(number_of_piles);
+
+    for(int i = start_pile_height - 1; i >= 0; i--){
+        int pile = 0;
+        for(unsigned int j = 1; j < crate_text[0].length(); j += 4){
+            if(crate_text[i][j] != ' '){
+                crate_stack[pile].push(crate_text[i][j]);
+            }
+
+            pile++;
+        }
+    }
+
+    return crate_stack;
+}
+
+vector<tuple<int, int, int>> parse_crane_commands(const vector<string>& command_text){
+    vector<tuple<int, int, int>> command_stack;
+
+    for(auto line : command_text){
+        stringstream ss(line);
+        int number_of_moves, source, target;
+        string garbage;
+
+        ss >> garbage >> number_of_moves >> garbage >> source >> garbage >> target;
+        command_stack.push_back(make_tuple(number_of_moves, source, target));
+    }
+
+    return command_stack;
+}
+
+int main(){
+    ifstream input_file("input.txt");
+    string line;
+
+    vector<string> crate_pile_text;
+    vector<string> crane_command_text;
+    bool reading_crates = true;
+
+    // Parse the text (fuckin hate parsing)
+    while(getline(input_file, line)){
+        if(line.length() <= 1){
+            reading_crates = false;
+            continue;
+        }
+
+        if(reading_crates){
+            crate_pile_text.push_back(line);
+        } else{
+            crane_command_text.push_back(line);
+        }
+    }
+
+    auto crate_stacks = parse_crate_stack(crate_pile_text);
+    auto command_stack = parse_crane_commands(crane_command_text);
+
+    // Execute the commands
+    for(auto command : command_stack){
+        int number_of_moves, source, target;
+        tie(number_of_moves, source, target) = command;
+
+        while(number_of_moves > 0){
+            char crate = crate_stacks[source - 1].top();
+            crate_stacks[source - 1].pop();
+            crate_stacks[target - 1].push(crate);
+
+            number_of_moves--;
+        }
+    }
+
+    // Print answer
+    cout << "Top crates: ";
+    for(auto s : crate_stacks){
+        cout << s.top();
+    } cout << endl;
+
+    // Testing parsing
+
+    // for(auto s : crate_pile_text){
+    //     cout << s << endl;
+    // }
+
+    // for(auto s : crane_command_text){
+    //     cout << s << endl;
+    // }
+
+    // for(auto s : crate_stacks){
+    //     while(!s.empty()){
+    //         char c = s.top();
+    //         cout << c << " ";
+    //         s.pop();
+    //     }
+    //     cout << endl;
+    // }
+
+    // for(auto t : command_stack){
+    //     int number_of_moves, source, target;
+    //     tie(number_of_moves, source, target) = t;
+    //     cout << number_of_moves << " " << source << " " << target << endl;
+    // }
+
+    return 0;
+}