diff --git a/Luogu/problem/P2108/P2108.cpp b/Luogu/problem/P2108/P2108.cpp
index 127dafb5..814e72be 100644
--- a/Luogu/problem/P2108/P2108.cpp
+++ b/Luogu/problem/P2108/P2108.cpp
@@ -3,64 +3,52 @@
 using namespace std;
 
 int main() {
+    string s;
     map<string, int> m;
-    string           s;
-    long long        ans = 0, now = 0;
-
-    m["one"]       = 1;
-    m["two"]       = 2;
-    m["three"]     = 3;
-    m["four"]      = 4;
-    m["five"]      = 5;
-    m["six"]       = 6;
-    m["seven"]     = 7;
-    m["eight"]     = 8;
-    m["nine"]      = 9;
-    m["ten"]       = 10;
-    m["eleven"]    = 11;
-    m["twelve"]    = 12;
-    m["thirteen"]  = 13;
-    m["fourteen"]  = 14;
-    m["fifteen"]   = 15;
-    m["sixteen"]   = 16;
+    int ans = 0, tmp = 0, w = 1;
+    m["one"] = 1;
+    m["two"] = 2;
+    m["three"] = 3;
+    m["four"] = 4;
+    m["five"] = 5;
+    m["six"] = 6;
+    m["seven"] = 7;
+    m["eight"] = 8;
+    m["nine"] = 9;
+    m["ten"] = 10;
+    m["eleven"] = 11;
+    m["twelve"] = 12;
+    m["thirteen"] = 13;
+    m["fourteen"] = 14;
+    m["fifteen"] = 15;
+    m["sixteen"] = 16;
     m["seventeen"] = 17;
-    m["eighteen"]  = 18;
-    m["nineteen"]  = 19;
-    m["twenty"]    = 20;
-    m["thirty"]    = 30;
-    m["forty"]     = 40;
-    m["fifty"]     = 50;
-    m["sixty"]     = 60;
-    m["seventy"]   = 70;
-    m["eighty"]    = 80;
-    m["ninety"]    = 90;
-
+    m["eighteen"] = 18;
+    m["nineteen"] = 19;
+    m["twenty"] = 20;
+    m["thirty"] = 30;
+    m["forty"] = 40;
+    m["fifty"] = 50;
+    m["sixty"] = 60;
+    m["seventy"] = 70;
+    m["eighty"] = 80;
+    m["ninety"] = 90;
     while (cin >> s) {
         if (s == "negative") {
-            cout << "-";
-        }
-        else if (s == "hundred") {
-            ans += now;
-            ans *= 100;
-            now = 0;
-        }
-        else if (s == "thousand") {
-            ans += now;
-            ans *= 1000;
-            now = 0;
-        }
-        else if (s == "million") {
-            ans += now;
-            ans *= 1000000;
-            now = 0;
-        }
-        else {
-            now += m[s];
+            w = -1;
+        } else if (s == "hundred") {
+            tmp *= 100;
+        } else if (s == "thousand") {
+            ans += tmp * 1000;
+            tmp = 0;
+        } else if (s == "million") {
+            ans += tmp * 1000000;
+            tmp = 0;
+        } else {
+            tmp += m[s];
         }
     }
-    if (now) {
-        ans += now;
-    }
-    cout << ans << endl;
+    ans += tmp;
+    cout << w * ans << endl;
     return 0;
 }