diff --git a/problems/0513.找树左下角的值.md b/problems/0513.找树左下角的值.md
index cfb4a6c4..70be7051 100644
--- a/problems/0513.找树左下角的值.md
+++ b/problems/0513.找树左下角的值.md
@@ -605,7 +605,7 @@ impl Solution {
         while !queue.is_empty() {
             for i in 0..queue.len() {
                 let node = queue.pop_front().unwrap().unwrap();
-                if i == 1 {
+                if i == 0 {
                     res = node.borrow().val;
                 }
                 if node.borrow().left.is_some() {