From adc95c8d0442703b60c0ffd28c089743df38056f Mon Sep 17 00:00:00 2001
From: Danila Fedorin <danila.fedorin@gmail.com>
Date: Wed, 9 Sep 2020 23:44:53 -0700
Subject: [PATCH] Initialize graph indegree.

---
 13/graph.hpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/13/graph.hpp b/13/graph.hpp
index 2807442..8a654aa 100644
--- a/13/graph.hpp
+++ b/13/graph.hpp
@@ -23,6 +23,8 @@ class function_graph {
         std::set<function> functions;
         std::set<group_id> adjacency_list;
         size_t indegree;
+
+        group_data() : indegree(0) {}
     };
 
     using data_ptr = std::shared_ptr<group_data>;