diff --git a/Others/1904.The-Number-of-Full-Rounds-You-Have-Played/1904.The-Number-of-Full-Rounds-You-Have-Played.cpp b/Others/1904.The-Number-of-Full-Rounds-You-Have-Played/1904.The-Number-of-Full-Rounds-You-Have-Played.cpp
index 6c1212aeb..438f8c9e4 100644
--- a/Others/1904.The-Number-of-Full-Rounds-You-Have-Played/1904.The-Number-of-Full-Rounds-You-Have-Played.cpp
+++ b/Others/1904.The-Number-of-Full-Rounds-You-Have-Played/1904.The-Number-of-Full-Rounds-You-Have-Played.cpp
@@ -4,16 +4,16 @@ class Solution {
     {
         vector<int>start = {stoi(startTime.substr(0,2)), stoi(startTime.substr(3))};
         vector<int>end = {stoi(finishTime.substr(0,2)), stoi(finishTime.substr(3))};
-
+        
+        if (start[0] * 60 + start[1] > end[0] * 60 + end[1])
+            end[0] += 24;
+        
         start[1] = (start[1]+14) / 15 * 15;
         end[1] = end[1] / 15 * 15;
-
-        int a = start[0]*60+start[1];
-        int b = end[0]*60+end[1];
-
-        if (a > b)
-            b += 24*60;
-
-        return (b-a)/15;
+               
+        int a = start[0] * 60 + start[1];
+        int b = end[0] * 60 + end[1];
+                
+        return max(0, (b-a)/15);        
     }
 };