Added Solution of Gas Station (JavaScript)

Author: deepesh85b

LeetcodeProblems/Algorithms/GasStation/gasStation.js

@@ -0,0 +1,36 @@
+/**
+ * Problem: https://leetcode.com/problems/gas-station/description/
+ */
+/**
+ * @param {number[]} gas
+ * @param {number[]} cost
+ * @return {number}
+ */
+var canCompleteCircuit = function(gas, cost) {
+  var gasSum =0, costSum = 0;
+  var len = gas.length;
+  var result = 0;
+
+  for (var i = 0; i < len; ++i) {
+    gasSum += gas[i];
+    costSum += cost[i];
+  }
+
+  if (costSum > gasSum)
+    return -1;
+  else {
+    gasSum = costSum = 0;
+    for (var i = 0; i < len; ++i) {
+      gasSum += gas[i];
+      costSum += cost[i];
+      if (costSum > gasSum) {
+        gasSum = 0;
+        costSum = 0;
+        result = i + 1;
+      }
+    }
+  }
+
+  return result;
+};
+module.exports = canCompleteCircuit;