
import java.util.*;
import java.lang.*;
class Solution {
public int solution(int n, int m, int[] section) {
int start = section[0];
int end = section[0] + (m-1);
int ans = 1;
for(int i : section){
if(i>=start && i<=end)
continue;
else{
start = i;
end = i + (m-1);
ans++;
}
}
return ans;
}
}