fix

Author: lrvideckis

library/data_structures/dsu/dsu.hpp

@@ -7,6 +7,6 @@ struct dsu {
   bool join(int a, int b) {
     if ((a = go(a)) == (b = go(b))) return 0;
     if (e[a] > e[b]) swap(a, b);
-    return e[a] += e[b], e[b] = a;
+    return e[a] += e[b], e[b] = a, 1;
   }
 };

tests/.config/.cppcheck_suppression_list

@@ -42,6 +42,7 @@ syntaxError:../library/trees/lca_rmq/iterate_subtree.hpp:6
 knownConditionTrueFalse:../library/strings/suffix_array/suffix_array.hpp:62
 knownConditionTrueFalse:../library/strings/suffix_array/suffix_array_short.hpp:29
 knownConditionTrueFalse:../library/data_structures/dsu/kruskal_tree.hpp:15
+knownConditionTrueFalse:../library/data_structures/dsu/dsu.hpp:10
 constVariable:../kactl/content/numerical/NumberTheoreticTransform.h:30
 constVariable:../kactl/content/graph/CompressTree.h:20
 constVariableReference:../kactl/content/graph/CompressTree.h:20