diff --git a/TangDou/LanQiaoBei/LanQiao14STEMA202212/4.cpp b/TangDou/LanQiaoBei/LanQiao14STEMA202212/4.cpp
index 3d163df..061f43e 100644
--- a/TangDou/LanQiaoBei/LanQiao14STEMA202212/4.cpp
+++ b/TangDou/LanQiaoBei/LanQiao14STEMA202212/4.cpp
@@ -22,10 +22,7 @@ void dfs(int u, int r, int c) {
     }
     // 现在剩余的油量是r,加满的话油量是d
     //  如果现在剩余的油量r不足以跑完下一个路a[u+1],那么必须在本站加油到d
-    if (d < a[u + 1]) {
-        cout << -1 << endl;
-        exit(0);
-    }
+    if (d < a[u + 1]) return;
 
     if (r >= a[u + 1]) { // 我有两种选择：1、在本站不加油，2、我就加满
         dfs(u + 1, r - a[u + 1], c);
@@ -38,6 +35,10 @@ int main() {
     for (int i = 1; i <= n; i++) cin >> a[i];
 
     dfs(0, 0, 0);
-    cout << res << endl;
+
+    if (res == INF)
+        cout << -1 << endl;
+    else
+        cout << res << endl;
     return 0;
 }
\ No newline at end of file