include cstdint

day01cpp/main.cpp

 #include <algorithm>
+#include <cstdint>
 #include <fstream>
 #include <iostream>
 #include <ranges>
@@ -8,7 +9,7 @@
 void part_a() {
     std::ifstream data("data.txt");
     std::string   line;
-    int           sum = 0;
+    uint32_t      sum = 0;
 
     while (std::getline(data, line)) {
         int a = *std::ranges::find_if(line.begin(), line.end(), [](char c) {