add 605 ts solution

Author: JeremyXXXuuu

Problems/18-Can-Place-Flowers/605.ts

@@ -0,0 +1,12 @@
+function canPlaceFlowers(flowerbed: number[], n: number): boolean {
+    let num: number = 0;
+    let flag: boolean = false;
+    for (let i = 0; i < flowerbed.length; i++) {
+        if (flag === true) i++;
+        if ((flowerbed[i - 1] === 0 || flowerbed[i - 1] === undefined) && flowerbed[i] === 0 && (flowerbed[i + 1] === 0 || flowerbed[i + 1] === undefined)) {
+            num++;
+            flag = true;
+        } else flag = false;
+    }
+    return num >= n;
+};