14. Football

14. Football

　　Petya loves football very much. One day, as he was watching a football match, he was writing the players' current positions on a piece of paper. To simplify the situation he depicted it as a string consisting of zeroes and ones. A zero corresponds to players of one team; a one corresponds to players of another team. If there are at least 7 players of some team standing one after another, then the situation is considered dangerous. For example, the situation 00100110111111101 is dangerous and 11110111011101 is not. You are given the current situation. Determine whether it is dangerous or not.

Input

　　The first input line contains a non-empty string consisting of characters "0" and "1", which represents players. The length of the string does not exceed 100 characters. There's at least one player from each team present on the field.

Output

　　Print "YES" if the situation is dangerous. Otherwise, print "NO".

Examples

Input

　　001001

Output

　　NO

Input

　　1000000001

Output

　　YES

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说明：不要看题目很长，其实这是一道水题，只需要判断字符串是否出现"0000000"或者"1111111"，如果出现输出"YES"，没有出现输出"NO"。两种方法：

方法一：

import java.util.Scanner;

public class Test14 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String str = sc.nextLine();
        if(str.contains("0000000") || str.contains("1111111")){
            System.out.println("YES");
        }else{
            System.out.println("NO");
        }
        sc.close();
    }
}

方法二：

import java.util.Scanner;

public class Test14 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String str = sc.nextLine();
        
        char[] chArr = str.toCharArray();
        int max = 0;
        int num = 0;

        for (int i = 0; i < chArr.length - 1; i++) {
            if (chArr[i] == chArr[i + 1]) {
                num++;
                if (num > max) {
                    max = num;
                }
                continue;
            } else {
                num = 0;
            }
        }

        if (max >= 7) {
            System.out.println("YES");
        } else {
            System.out.println("NO");
        }
        sc.close();
    }
}