96vksinghcort
diff --git a/‎61-70/69. Sqrt(x).js
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+7Lines changed: 7 additions & 0 deletions b/‎61-70/69. Sqrt(x).js
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+7Lines changed: 7 additions & 0 deletions
diff --git a/‎61-70/70. Climbing Stairs.js
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+6Lines changed: 6 additions & 0 deletions b/‎61-70/70. Climbing Stairs.js
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+6Lines changed: 6 additions & 0 deletions
@@ -0,0 +1,7 @@
+var mySqrt = function(x) {
+    let r = x
+    while(r*r > x ){
+        r = Math.floor((r + x/r) / 2)
+    }
+    return r;
+};
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+var climbStairs = function(n) {
+    if(n < 4){return n}
+    let arr = [1,2,3]
+    for(let i=4; i<= n;i++) {arr[i-1] = (arr[i-2] + arr[i-3]);}
+    return arr[arr.length -1];
+};