2023 Day 1 now tidied

2023/puzzle-01-01.cc

@@ -1,7 +1,10 @@
+#include <array>
 #include <cassert>
+#include <cstdint>
 #include <cstdlib>
 #include <iostream>
 #include <string>
+#include <utility>
 
 using UInt = std::uint64_t;
 
@@ -44,8 +47,8 @@ auto find_last_digit(std::string const& line) -> int
 
 auto main() -> int
 {
-  UInt sum1{0};
-  UInt sum2{0};
+  int sum1{0};
+  int sum2{0};
 
   std::string line;
   while (std::getline(std::cin, line)) {
@@ -54,7 +57,7 @@ auto main() -> int
     assert(first != std::string::npos);
     assert(last != std::string::npos);
     sum1 += (line[first] - '0') * 10;
-    sum1 += (line[last] - '0');
+    sum1 += line[last] - '0';
     sum2 += find_first_digit(line) * 10;
     sum2 += find_last_digit(line);
   }