Problem: Toad Rash has a binary string s. A binary string consists only of zeros and ones.

Let n be the length of s.

Rash needs to find the number of such pairs of integers l, r that 1 ≤ l ≤ r ≤ n and there is at least one pair of integers x, k such that 1 ≤ x, k ≤ n, l ≤ x < x + 2k ≤ r, and s_x = s_{x+k} = s_{x+2k}.

Find this number of pairs for Rash.

Input

The first line contains the string s (1 ≤ |s| ≤ 300 000), consisting of zeros and ones.

Output

Output one integer: the number of such pairs of integers l, r that 1 ≤ l ≤ r ≤ n and there is at least one pair of integers x, k such that 1 ≤ x, k ≤ n, l ≤ x < x + 2k ≤ r, and s_x = s_{x+k} = s_{x+2k}.

Examples

Input


010101


Output


3


Input


11001100


Output


0

Note

In the first example, there are three l, r pairs we need to count: 1, 6; 2, 6; and 1, 5.

In the second example, there are no values x, k for the initial string, so the answer is 0.

Solution (in JAVA):

Solution:
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStreamWriter;
import java.lang.invoke.MethodHandles;
import java.math.BigInteger;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.PriorityQueue;
import java.util.Random;
import java.util.TreeSet;

public final class CF_562_D2_D
{





	static boolean verb=true;
	static void log(Object X){if (verb) System.err.println(X);}
	static void log(Object[] X){if (verb) {for (Object U:X) System.err.print(U+" ");System.err.println("");}}
	static void log(int[] X){if (verb) {for (int U:X) System.err.print(U+" ");System.err.println("");}}
	static void log(int[] X,int L){if (verb) {for (int i=0;i<L;i++) System.err.print(X[i]+" ");System.err.println("");}}
	static void log(long[] X){if (verb) {for (long U:X) System.err.print(U+" ");System.err.println("");}}

	static void logWln(Object X){if (verb) System.err.print(X);}
	static void info(Object o){	System.out.println(o);}
	static void output(Object o){outputWln(""+o+"\n");	}
	static void outputWln(Object o){try {out.write(""+ o);} catch (Exception e) {}}

	static long mod=1000000007;

	// Global vars
	static BufferedWriter out;
	static InputReader reader;


	static long powerMod(long b,long e,long m){
		long x=1;
		while (e>0) {
			if (e%2==1)
				x=(b*x)%m;
			b=(b*b)%m;
			e=e/2;
		}
		return x; 
	}


	static long pgcd(long a,long b){
		if (b>a)
			return pgcd(b,a);
		while (b>0){
			long c=b;
			b=a%b;
			a=c;
		}
		return a;
	}




	static void test() {
		log("testing");

		log("done");
	}


	static boolean ok(String s,int e,int f) {
		
		/*
		int L=f-e;
		int x=Integer.parseInt(s.substring(e,f),2);
		if (cache[L][x]!=0)
			return cache[L][x]==1;
		*/
		
		loop:for (int i=e;i<f;i++) {
			for (int k=1;i+2*k<f;k++) {
				if (s.charAt(i)==s.charAt(i+k) && s.charAt(i)==s.charAt(i+2*k)) {
					//cache[L][x]=1;
					return true;
				}
			}
		}
		//cache[L][x]=-1;
	return false;
	}

	static void explore(int L) {
		int MX=1<<L;
		int[] found=new int[MX];
		Arrays.fill(found, -1);
		int cnt=0;
		for (int u=0;u<MX;u++) {
			String s=Integer.toBinaryString(u);
			while (s.length()<L)
				s="0"+s;
			if (ok(s,0,s.length()))
				cnt++;
			else {
				log("not working with s:"+s);
			}
				
		}
		log("MX:"+MX+" cnt:"+cnt);
	}
	
	static int GOOD=9;
	
	static int[][] cache;

	static void process() throws Exception {

		out = new BufferedWriter(new OutputStreamWriter(System.out));
		reader = new InputReader(System.in);

		//cache=new int[GOOD][1<<(GOOD)];
		
		String s=reader.readString();
		
		long res=0;
		int L=s.length();
		for (int i=0;i<L;i++) {
			int j=i+GOOD-1;
			if (j<L) {
				res+=L-j;
			}
			for (int u=1;u<GOOD && u+i<=L;u++) {
				j=i+u;
				if (ok(s,i,j))
					res++;
			}
		}
		output(res);


		try {
			out.close();
		} catch (Exception e) {
		}

	}

	public static void main(String[] args) throws Exception {
		process();

	}

	static final class InputReader {
		private final InputStream stream;
		private final byte[] buf = new byte[1024];
		private int curChar;
		private int numChars;

		public InputReader(InputStream stream) {
			this.stream = stream;
		}

		private int read() throws IOException {
			if (curChar >= numChars) {
				curChar = 0;
				numChars = stream.read(buf);
				if (numChars <= 0) {
					return -1;
				}
			}
			return buf[curChar++];
		}

		public final String readString() throws IOException {
			int c = read();
			while (isSpaceChar(c)) {
				c = read();
			}
			StringBuilder res = new StringBuilder();
			do {
				res.append((char) c);
				c = read();
			} while (!isSpaceChar(c));
			return res.toString();
		}

		public final int readInt() throws IOException {
			int c = read();
			boolean neg = false;
			while (isSpaceChar(c)) {
				c = read();
			}
			char d = (char) c;
			// log("d:"+d);
			if (d == '-') {
				neg = true;
				c = read();
			}
			int res = 0;
			do {
				res *= 10;
				res += c - '0';
				c = read();
			} while (!isSpaceChar(c));
			// log("res:"+res);
			if (neg)
				return -res;
			return res;

		}

		public final long readLong() throws IOException {
			int c = read();
			boolean neg = false;
			while (isSpaceChar(c)) {
				c = read();
			}
			char d = (char) c;
			// log("d:"+d);
			if (d == '-') {
				neg = true;
				c = read();
			}
			long res = 0;
			do {
				res *= 10;
				res += c - '0';
				c = read();
			} while (!isSpaceChar(c));
			// log("res:"+res);
			if (neg)
				return -res;
			return res;

		}

		private boolean isSpaceChar(int c) {
			return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
		}
	}

}