add 55

Author: awesomelike

medium/55-jump-game.js

@@ -0,0 +1,9 @@
+const canJump = (nums) => {
+  let last = nums.length - 1;
+  for (let i = nums.length - 2; i >= 0; i--) {
+    if (i + nums[i] >= last) {
+      last = i;
+    }
+  }
+  return last === 0;
+}