from typing import List, Tuple

def getMinMaxLatency(g_nodes: int, g_from: List[int], g_to: List[int], g_weight: List[int], k: int) -> int:
    """
    This function divides a network of data centers into optimal local regions by removing some of the connections 
    such that the maximum latencies of all the regions are minimized. It returns the minimum possible value of the 
    maximum max-latency of the networks formed.
    
    Parameters:
    g_nodes (int): The number of data centers
    g_from (List[int]): One end of the connections
    g_to (List[int]): Another end of the connections
    g_weight (List[int]): The latency of the connections
    k (int): The maximum number of networks after removing some connections
    
    Returns:
    int: The minimum possible value of the max-latency of the networks formed
    
    Raises:
    ValueError: If the number of data centers is less than 1 or greater than 103
                If the number of edges is less than 1 or greater than 1.5x10^5
                If the latency of any connection is less than 1 or greater than 10^9
                If the maximum number of networks is less than 1 or greater than the number of data centers
    """
    try:
        # Check if the input constraints are met
        if g_nodes < 1 or g_nodes > 103:
            raise ValueError("The number of data centers must be between 1 and 103")
        if len(g_from) != len(g_to) or len(g_from) != len(g_weight):
            raise ValueError("The length of g_from, g_to, and g_weight must be the same")
        if len(g_from) < 1 or len(g_from) > 1.5*(10**5):
            raise ValueError("The number of edges must be between 1 and 1.5x10^5")
        if any(w < 1 or w > 10**9 for w in g_weight):
            raise ValueError("The latency of any connection must be between 1 and 10^9")
        if k < 1 or k > g_nodes:
            raise ValueError("The maximum number of networks must be between 1 and the number of data centers")

        # Create an adjacency list to represent the graph
        graph = {i: [] for i in range(1, g_nodes+1)}
        for i in range(len(g_from)):
            graph[g_from[i]].append((g_to[i], g_weight[i]))
            graph[g_to[i]].append((g_from[i], g_weight[i]))
        
        # Define a function to check if the graph is connected
        def is_connected(graph):
            visited = set()
            stack = [1]
            while stack:
                node = stack.pop()
                if node not in visited:
                    visited.add(node)
                    stack.extend([n for n, w in graph[node]])
            return len(visited) == g_nodes
        
        # Check if the graph is initially connected
        if not is_connected(graph):
            raise ValueError("The graph is not initially connected")
        
        # Define a function to check if the graph is k-connected
        def is_k_connected(graph, k):
            visited = set()
            stack = [1]
            while stack:
                node = stack.pop()
                if node not in visited:
                    visited.add(node)
                    stack.extend([n for n, w in graph[node]])
                    if len(visited) > k:
                        return False
            return len(visited) <= k
        
        # Define a function to check if the graph is k-connected with a maximum latency of max_latency
        def is_k_connected_with_max_latency(graph, k, max_latency):
            visited = set()
            stack = [1]
            while stack:
                node = stack.pop()
                if node not in visited:
                    visited.add(node)
                    stack.extend([n for n, w in graph[node] if w <= max_latency])
                    if len(visited) > k:
                        return False
            return len(visited) <= k
        
        # Define a function to perform binary search for the minimum possible value of the max-latency
        def binary_search_min_max_latency(graph, k):
            left = 1
            right = max(g_weight)
            while left <= right:
                mid = (left + right) // 2
                if is_k_connected_with_max_latency(graph, k, mid):
                    right = mid - 1
                else:
                    left = mid + 1
            return left
        
        # Perform binary search for the minimum possible value of the max-latency
        return binary_search_min_max_latency(graph, k)
    
    except ValueError as e:
        # Log the error
        print(f"Error: {e}")
        return 0
        
        
g_nodes = 2
g_from = [1]
g_to = [2]
g_weight = [3]
k = 1
print(getMinMaxLatency(g_nodes, g_from, g_to, g_weight, k))
 

Python Online Compiler

Write, Run & Share Python code online using OneCompiler's Python online compiler for free. It's one of the robust, feature-rich online compilers for python language, supporting both the versions which are Python 3 and Python 2.7. Getting started with the OneCompiler's Python editor is easy and fast. The editor shows sample boilerplate code when you choose language as Python or Python2 and start coding.

Taking inputs (stdin)

OneCompiler's python online editor supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample python program which takes name as input and print your name with hello.

import sys
name = sys.stdin.readline()
print("Hello "+ name)

About Python

Python is a very popular general-purpose programming language which was created by Guido van Rossum, and released in 1991. It is very popular for web development and you can build almost anything like mobile apps, web apps, tools, data analytics, machine learning etc. It is designed to be simple and easy like english language. It's is highly productive and efficient making it a very popular language.

Tutorial & Syntax help

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition IF-ELSE is used.

if conditional-expression
    #code
elif conditional-expression
    #code
else:
    #code

Note:

Indentation is very important in Python, make sure the indentation is followed correctly

2. For:

For loop is used to iterate over arrays(list, tuple, set, dictionary) or strings.

Example:

mylist=("Iphone","Pixel","Samsung")
for i in mylist:
    print(i)

3. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while condition  
    #code 

Collections

There are four types of collections in Python.

1. List:

List is a collection which is ordered and can be changed. Lists are specified in square brackets.

Example:

mylist=["iPhone","Pixel","Samsung"]
print(mylist)

2. Tuple:

Tuple is a collection which is ordered and can not be changed. Tuples are specified in round brackets.

Example:

myTuple=("iPhone","Pixel","Samsung")
print(myTuple)

Below throws an error if you assign another value to tuple again.

myTuple=("iPhone","Pixel","Samsung")
print(myTuple)
myTuple[1]="onePlus"
print(myTuple)

3. Set:

Set is a collection which is unordered and unindexed. Sets are specified in curly brackets.

Example:

myset = {"iPhone","Pixel","Samsung"}
print(myset)

4. Dictionary:

Dictionary is a collection of key value pairs which is unordered, can be changed, and indexed. They are written in curly brackets with key - value pairs.

Example:

mydict = {
    "brand" :"iPhone",
    "model": "iPhone 11"
}
print(mydict)

Supported Libraries

Following are the libraries supported by OneCompiler's Python compiler

NameDescription
NumPyNumPy python library helps users to work on arrays with ease
SciPySciPy is a scientific computation library which depends on NumPy for convenient and fast N-dimensional array manipulation
SKLearn/Scikit-learnScikit-learn or Scikit-learn is the most useful library for machine learning in Python
PandasPandas is the most efficient Python library for data manipulation and analysis
DOcplexDOcplex is IBM Decision Optimization CPLEX Modeling for Python, is a library composed of Mathematical Programming Modeling and Constraint Programming Modeling