#include<stdio.h>

int main() {
int n;int k;
printf("Enter number of chair and number of parasol stands");
printf("\n");
scanf("%d",&n);
scanf(" %d",&k);

int chair[10];
printf("Chair indices:");
printf("\n");
for(int i=0;i<n;i++){
int tr;
scanf("%d",&tr);
chair[i]=tr;
}

//Calculating area to cover
int lentocover=0;
for(int i=0;i<n-1;i++){
lentocover=lentocover+(chair[i+1]-chair[i]);

}

//the required result is lentocover/number of parasol stands
int result=lentocover/k;
printf("\nWidth of parasol required is :%d",result);
}