Fix warnings

c++/Makefile

@@ -1,5 +1,5 @@
 aoc-cpp: $(wildcard *.cpp)
-	g++ -std=c++20 -o aoc-cpp $^
+	g++ -std=c++20 -Wall -Wextra -o aoc-cpp $^
 
 all: aoc-cpp
 

c++/problem2.cpp

@@ -9,7 +9,7 @@ pair<string, string> solve2(istream& input) {
     uint64_t part1 = 0, part2 = 0;
     for (string line; getline(input, line); ) {
         stringstream line_stream(line);
-        int64_t min_count, max_count;
+        uint64_t min_count, max_count;
         char target;
         string password;
         line_stream >> min_count;

c++/problem3.cpp

@@ -28,7 +28,7 @@ pair<string, string> solve3(istream& input) {
     uint64_t part1;
     for (auto slope : slopes) {
         uint64_t total_trees = 0;
-        for (auto pos = pair(0, 0); pos.second < my_map.size(); ) {
+        for (auto pos = pair<uint64_t, uint64_t>(0, 0); pos.second < my_map.size(); ) {
             total_trees += (int) my_map[pos.second][pos.first] == '#';
             pos.first = (pos.first + slope.first) % width;
             pos.second += slope.second;