#include <stdio.h>
    void reverse(int *arr, int n , int k){
        int start =0;
        int end = k-1;
        while(start<end){
            int temp = *(arr + start);
            *(arr + start) = *(arr + end);
            *(arr + end) = temp;
            start++;
            end--;
        }
    }
    int main(){
    int n ,k;
    scanf("%d %d",&n,&k);
    if(n<0 || k<0 || k>n){
        printf("invalid input");
        return 0;
    }
    int arr[n];
    for(int i=0;i<n;i++);
        scanf("%d",arr+1);
}
reverse(arr,n,k);
for(int i = 0;i<n;printf("%d",arr[i++]));
}