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Left Rotate Array by K Positions

Code

#include <stdio.h>

void rotate_left(int arr[], int n, int k) {
  for (int i = 0; i < k; i++) {
    for (int j = 0; j < n - 1; j++) {
      int tmp = arr[j];
      arr[j] = arr[j + 1];
      arr[j + 1] = tmp;
    }
  }
}

int main() {
  int n, k;
  scanf("%d %d", &n, &k);

  int arr[100];

  // Read array elements
  for (int i = 0; i < n; i++) {
    scanf("%d", &arr[i]);
  }

  // Rotate the array
  rotate_left(arr, n, k);

  // Print the rotated array
  for (int i = 0; i < n; i++) {
    printf("%d", arr[i]);
    if (i < n - 1) {
      printf(" ");
    }
  }

  return 0;
}

Solving Approach

 

 

 

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Input

5 2 1 2 3 4 5

Expected Output

3 4 5 1 2