There is a fence in front of Polycarpus's home. The fence consists of n planks of the same width which go one after another from left to right. The height of the i-th plank is hi meters, distinct planks can have distinct heights.

<image> Fence for n = 7 and h = [1, 2, 6, 1, 1, 7, 1]

Polycarpus has bought a posh piano and is thinking about how to get it into the house. In order to carry out his plan, he needs to take exactly k consecutive planks from the fence. Higher planks are harder to tear off the fence, so Polycarpus wants to find such k consecutive planks that the sum of their heights is minimal possible.

Write the program that finds the indexes of k consecutive planks with minimal total height. Pay attention, the fence is not around Polycarpus's home, it is in front of home (in other words, the fence isn't cyclic).

Input

The first line of the input contains integers n and k (1 ≤ n ≤ 1.5·105, 1 ≤ k ≤ n) — the number of planks in the fence and the width of the hole for the piano. The second line contains the sequence of integers h1, h2, ..., hn (1 ≤ hi ≤ 100), where hi is the height of the i-th plank of the fence.

Output

Print such integer j that the sum of the heights of planks j, j + 1, ..., j + k - 1 is the minimum possible. If there are multiple such j's, print any of them.

Examples

Input

7 3
1 2 6 1 1 7 1


Output

3

Note

In the sample, your task is to find three consecutive planks with the minimum sum of heights. In the given case three planks with indexes 3, 4 and 5 have the required attribute, their total height is 8.
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.StringTokenizer;

public class Solution {
	
//	public static final double eps = 1e-9;
//	public static final int mod = 1000000007;
//	public static final double pi = 3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679;
//	public static final int sievesize = (int) (1e6 + 10);
//	public static boolean[] prime;
//	public static final int dx[] = {1, -1, 0, 0};
//	public static final int dy[] = {0, 0, 1, -1};

	public static void main(String[] args) throws IOException {
		InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        OutputWriter out = new OutputWriter(outputStream);
        Task solver = new Task();
        solver.solve(1, in, out);
        out.close();
	}
	
	static class Task {
		
        public void solve(int testNumber, InputReader in, OutputWriter out) throws IOException {
        	int n = in.nextInt(), k = in.nextInt();
        	int[] arr = in.nextIntArray(n);
        	long sum = 0;
        	long min = Long.MAX_VALUE;
        	for(int i = 0; i < k; i++)
        		sum += arr[i];
        	min = Math.min(min, sum);
        	int l = 0, m = k, pos = 0;;
        	while(m < n) {
        		sum -= arr[l++];
        		sum += arr[m++];
        		if(sum < min) {
        			min = sum;
        			pos = l;
        		}
        	}
        	out.println(pos + 1);
        }
        
//        static class Node {
//        	LinkedList<Pair> list;
//        	boolean storage;
//        	
//        	public Node() {
//				list = new LinkedList<>();
//				storage = false;
//			}
//        }
        
//        static class Pair implements Comparable<Pair> {
//        	
//        	long first, second;
//        	
//        	public Pair(long first, long second) {
//        		this.first = first;
//				this.second = second;
//			}
//
//			@Override
//			public int compareTo(Pair o) {
//				return 0;
//			}	
//        }
    }
	
//	public static int[] shuffle(int arr[], Random gen) {
//		for(int i = 0, n = arr.length; i < n; i++)
//		{
//			int index = gen.nextInt(n - i) + i;
//			int temp = arr[i];
//			arr[i] = arr[index];
//			arr[index] = temp;
//		}
//		return arr;
//	}
//
//	public static boolean triangle(long a, long b, long c){
//	    return ((a+b) > c && (b+c) >a && (a+c) > b);
//	}
//		
//	public static boolean isPerfectSquare(long n){
//		if (n < 0) 
//	    	return false;
//	    long test = (long) (Math.sqrt(n) + 0.5);
//	    return test*test == n;
//	}
//		
//	public static int isnum(char s){
//		if(s=='1' || s=='2' || s=='3' || s=='4' || s=='5' || s=='6' || s=='7' || s=='8' || s=='9' || s=='0') 
//	    	return 1; 
//		return 0;
//	}
//		
//	public static long nextPowerOf2(long n){
//	    n--;
//	    n |= n >> 1;
//	    n |= n >> 2;
//	    n |= n >> 4;
//	    n |= n >> 8;
//	    n |= n >> 16;
//	    n++;
//	    return n;
//	}
//		
//	public static long gcd(long a, long b){
//	    long t; 
//	    while (b > 0){ 
//	    	a = a%b; 
//	    	t = a; 
//	    	a = b; 
//	    	b = t; 
//    	}
//	    return a;
//	}
//		
//	public static void sieve(int n){
//		prime=new boolean[sievesize+1];
//	    long x, y; 
//	    prime[0] = prime[1] = true;
//	    for(x = 2; x * x <= sievesize; x++)
//	    { 
//	    	if(!prime[(int) x])
//	    		for(y = x * x; y <= sievesize; y += x) 
//	    			prime[(int) y]=true; 
//	    }
//	}
	
	static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }
        
        public long nextLong() {
        	return Long.parseLong(next());
        }
        
        public int[] nextIntArray(int size) {
        	while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
        	int[] arr=new int[size];
        	for(int i = 0; i < size; i++) 
        		arr[i] = Integer.parseInt(tokenizer.nextToken());
        	return arr;
        }

        public long[] nextLongArray(int size) {
        	while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
        	long[] arr=new long[size];
        	for(int i = 0; i < size; i++) 
        		arr[i] = Long.parseLong(tokenizer.nextToken());
        	return arr;
        }
        
        public double[] nextDoubleArray(int size) {
        	while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
        	double[] arr=new double[size];
        	for(int i = 0; i < size; i++) 
        		arr[i] = Double.parseDouble(tokenizer.nextToken());
        	return arr;
        }
        
        public String[] nextStringArray(int size) throws IOException {
        	String[] arr=new String[size];
        	for(int i = 0; i < size; i++) 
        		arr[i] = reader.readLine();
        	return arr;
        }
        
        public char[] nextCharArray(int size) throws IOException {
        	char[] arr=reader.readLine().toCharArray();
        	return arr;
        }
    }
	
	static class OutputWriter {
		public PrintWriter pw;
		
		public OutputWriter(OutputStream stream) {
			pw = new PrintWriter(stream);
		}
		
		public void println(Object str) {
			pw.println(str);
		}
		
		public void print(Object str) {
			pw.print(str + " ");
		}
		
		public void close() {
			pw.close();
		}
		
		public void flush() {
			pw.flush();
		}
		
		public void printStringArray(String[] arr) {
			for(int i = 0; i < arr.length; i++)
				pw.println(arr[i]);
		}
		
		public void printIntArray(int[] arr) {
			for(int i = 0; i < arr.length; i++)
				pw.print(arr[i] + " ");
		}
		
		public void printLongArray(long[] arr) {
			for(int i = 0; i < arr.length; i++)
				pw.print(arr[i] + " ");
		}
		
		public void printCharArray(char[] arr) {
			for(int i = 0; i < arr.length; i++)
				pw.print(arr[i] + " ");
		}
		
		public void printFloatArray(float[] arr) {
			for(int i = 0; i < arr.length; i++)
				pw.print(arr[i] + " ");
		}
		
		public void printDoubleArray(double[] arr) {
			for(int i = 0; i < arr.length; i++)
				pw.print(arr[i] + " ");
		}
	}
}