fix gcc warnings

3 files changed, 6 insertions, 4 deletions

diff --git a/src/2016/day2/aoc.h b/src/2016/day2/aoc.h
index 9a587d3..b18fac0 100644
--- a/src/2016/day2/aoc.h
+++ b/src/2016/day2/aoc.h
@@ -2,6 +2,7 @@
 #include "common.h"
 #include <map>
 #include <vector>
+#include <climits>
 
 namespace aoc2016 {
 
diff --git a/src/2017/day2/aoc.cpp b/src/2017/day2/aoc.cpp
index 5c09411..9ad3af7 100644
--- a/src/2017/day2/aoc.cpp
+++ b/src/2017/day2/aoc.cpp
@@ -1,5 +1,6 @@
 #include "aoc.h"
 #include <vector>
+#include <climits>
 
 namespace aoc2017 {
 
@@ -20,7 +21,7 @@ int evenly_divisible(int x, int y) {
   return max % min == 0 ? max / min : 0;
 }
 
-int diff(size_t i, const std::vector<int>& v) {
+int diffr(size_t i, const std::vector<int>& v) {
   if (i == v.size() - 1) {
     return 0;
   } else {
@@ -30,7 +31,7 @@ int diff(size_t i, const std::vector<int>& v) {
         return d;
       }
     }
-    return diff(i + 1, v);
+    return diffr(i + 1, v);
   }
 }
 
@@ -58,7 +59,7 @@ std::pair<int, int> day2(line_view file) {
   per_line(file, [&sum1, &sum2](line_view lv) {
     std::vector<int> v;
     sum1 += diff(lv, v);
-    sum2 += diff(size_t(0), v);
+    sum2 += diffr(0, v);
     return true;
   });
   return {sum1, sum2};
diff --git a/src/2021/day2/aoc.cpp b/src/2021/day2/aoc.cpp
index fa415ef..80b43ac 100644
--- a/src/2021/day2/aoc.cpp
+++ b/src/2021/day2/aoc.cpp
@@ -5,7 +5,7 @@ namespace aoc2021 {
 std::pair<int, int> day2(line_view file) {
   meters m1{0, 0};
   meters m2{0, 0};
-  int aim;
+  int aim{0};
   per_line(file, [&m1, &m2, &aim](line_view lv) {
     m1.apply(lv);
     m2.apply(lv, &aim);