1 files changed, 3 insertions, 1 deletions
diff --git a/graph/havelHakimi.cpp b/graph/havelHakimi.cpp
index 6246fe0..cbd6991 100644
--- a/graph/havelHakimi.cpp
+++ b/graph/havelHakimi.cpp
@@ -1,6 +1,8 @@
 vector<vector<int>> havelHakimi(const vector<int>& deg) {
 	priority_queue<pair<int, int>> pq;
-	for (int i = 0; i < sz(deg); i++) pq.push({deg[i], i});
+	for (int i = 0; i < sz(deg); i++) {
+		if (deg[i] > 0) pq.push({deg[i], i});
+	}
 	vector<vector<int>> adj;
 	while (!pq.empty()) {
 		auto [degV, v] = pq.top(); pq.pop();