Add 2017 day 5 puzzles

2017/puzzle-05-01.cc

@@ -0,0 +1,26 @@
+#include <iostream>
+#include <string>
+#include <vector>
+
+using Int = long;
+
+auto main() -> int
+{
+  std::vector<Int> jumps;
+  std::string line;
+  while (std::getline(std::cin, line) && !line.empty()) {
+    jumps.push_back(std::stol(line));
+  }
+
+  Int pc{0};
+  unsigned steps{0};
+  while (pc >= 0 && pc < jumps.size()) {
+    ++steps;
+    auto delta = jumps[pc];
+    ++(jumps[pc]);
+    pc += delta;
+  }
+
+  std::cout << "Steps: " << steps << '\n';
+  return 0;
+}

2017/puzzle-05-02.cc

@@ -0,0 +1,31 @@
+#include <iostream>
+#include <string>
+#include <vector>
+
+using Int = long;
+
+auto main() -> int
+{
+  std::vector<Int> jumps;
+  std::string line;
+  while (std::getline(std::cin, line) && !line.empty()) {
+    jumps.push_back(std::stol(line));
+  }
+
+  Int pc{0};
+  unsigned steps{0};
+  while (pc >= 0 && pc < jumps.size()) {
+    ++steps;
+    auto delta = jumps[pc];
+    if (delta >= 3) {
+      --(jumps[pc]);
+    }
+    else {
+      ++(jumps[pc]);
+    }
+    pc += delta;
+  }
+
+  std::cout << "Steps: " << steps << '\n';
+  return 0;
+}