Add Gas Station C#

Author: hellomrsun

September-LeetCoding-Challenge/23-Gas-Station/Gas-Station.cs

@@ -0,0 +1,21 @@
+public class Solution {
+    public int CanCompleteCircuit(int[] gas, int[] cost) {
+        int sumGas = 0, sumCost = 0, tank = 0, pos = 0;
+        
+        for(int i = 0; i<gas.Length; i++){
+            sumGas += gas[i];
+            sumCost += cost[i];
+            tank += gas[i] - cost[i];
+            if(tank < 0){
+                pos = i+1;
+                tank = 0;
+            }
+        }
+        
+        if(sumGas >= sumCost){
+            return pos;
+        }
+        
+        return -1;
+    }
+}