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  1. Left Rotation
  2. Discussions

Left Rotation

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145 Discussions

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  • puneethmgowda047
     + 0 comments

    one line finisher return arr[d:]+arr[:d]

  • voronin_ilia
     + 0 comments

    C++ Solution:

    vector rotateLeft(int d, vector arr) {

    auto calcOldIndex = [](int newIndex, int shift, int size) 
{
    int tmp = newIndex + shift;
    if(tmp >= size)
        tmp = tmp - size;
    return tmp;
};

vector<int> res;

for(int i = 0; i < (int)arr.size(); i++){
    res.push_back(arr[calcOldIndex(i, d, arr.size())]);
}
return res;

    }

  • easobral
     + 0 comments

    python 3

    def rotateLeft(d, arr):
return map(lambda x: arr[(x[0]+d) % len(arr)], enumerate(arr))

  • outsider973
     + 0 comments

    My rust solution:

    fn rotateLeft(d: i32, arr: &mut [i32]) {
    arr.rotate_left(d as usize);
}

  • dluksa20
     + 0 comments
    def rotateLeft(d, arr):
    # Write your code here
    for i in range(d):
        arr.append(arr[i])
    return arr[d:]