Create Zero Array Transformation I.py

Author: erjan

Zero Array Transformation I.py

@@ -0,0 +1,30 @@
+You are given an integer array nums of length n and a 2D array queries, where queries[i] = [li, ri].
+
+For each queries[i]:
+
+Select a subset of indices within the range [li, ri] in nums.
+Decrement the values at the selected indices by 1.
+A Zero Array is an array where all elements are equal to 0.
+
+Return true if it is possible to transform nums into a Zero Array after processing all the queries sequentially, otherwise return false.
+
+
+class Solution:
+    def isZeroArray(self, nums: List[int], queries: List[List[int]]) -> bool:
+        
+        pref = [0]*len(nums)
+        for q in queries:
+            a,b = q
+            for i in range(a,b+1):
+                pref[i] +=1
+        
+        print(pref)
+
+        if any( p<n   for n,p in zip(nums,pref)):
+            return False
+        
+        return True
+
+
+
+-------------------------------------------------------------------------------------