HackerRank:Arrays: Left Rotation Python3

题目

A left rotation operation on an array shifts each of the array's elements unit to the left. For example, if left rotations are performed on array , then the array would become .
Given an array of integers and a number, , perform left rotations on the array. Return the updated array to be printed as a single line of space-separated integers.
Function Description
Complete the function rotLeft in the editor below. It should return the resulting array of integers.
rotLeft has the following parameter(s):
An array of integers .
An integer , the number of rotations.
Input Format
The first line contains two space-separated integers and , the size of and the number of left rotations you must perform.
The second line contains space-separated integers .
Constraints
Output Format
Print a single line of space-separated integers denoting the final state of the array after performing left rotations.
Sample Input
5 4
1 2 3 4 5
Sample Output
5 1 2 3 4
Explanation
When we perform left rotations, the array undergoes the following sequence of changes:
Change Theme

简要介绍

就是数据移动，给出一个数组，给出向左移动的个数，解题思路 位置加上移动次数除以数组长度，就是移动后数据的位置

Answer

#!/bin/python3

import math
import os
import random
import re
import sys

# Complete the rotLeft function below.
def rotLeft(a, d):
    res=[]
    for i in range(0,len(a)):

        n=(i+d)%len(a)
        res.append(a[n])
    return res

if __name__ == '__main__':
    fptr = open(os.environ['OUTPUT_PATH'], 'w')

    nd = input().split()

    n = int(nd[0])

    d = int(nd[1])

    a = list(map(int, input().rstrip().split()))

    result = rotLeft(a, d)

    fptr.write(' '.join(map(str, result)))
    fptr.write('\n')

    fptr.close()