Added CF1739F

fei0319 · Mar 5, 2024 · b84c898 · b84c898
1 parent 1c0ceec
commit b84c898
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/contest/cf1739/F.cpp b/contest/cf1739/F.cpp
@@ -79,6 +79,8 @@ std::string construct_from(const std::string_view &s) {
             }
             S |= 1 << (c - 'a');
             res = c + res;
+        } else {
+            return {};
         }
     }
     return res;