Added older advents

advent_of_code_2022/day1/main.cc

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+#include <algorithm>
+#include <charconv>
+#include <fmt/format.h>
+#include <iostream>
+#include <string>
+#include <vector>
+
+int main()
+{
+    std::vector<std::int64_t> elves;
+    elves.push_back(0);
+
+    std::int64_t calories{};
+    std::string buffer;
+
+    while (!std::cin.eof())
+    {
+        std::getline(std::cin, buffer);
+        
+        if (buffer.empty())
+        {
+            elves.push_back(0);
+            continue;
+        }
+        
+        std::from_chars(buffer.data(), buffer.data() + buffer.size(), calories);
+        elves.back() += calories;
+    }
+
+    std::int64_t max = *std::max_element(elves.begin(), elves.end());
+    fmt::print("Elf with most calories has {}\n", max);
+
+    std::int64_t top3{};
+    for (std::size_t idx = 0; idx < 3; ++idx)
+    {
+        auto it = std::max_element(elves.begin(), elves.end());
+        top3 += *it;
+        *it = 0;
+    }
+
+    fmt::print("Top3 elves with most calories have a combined: {}\n", top3);
+}