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21 lines
314 B
C#
21 lines
314 B
C#
using System;
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namespace problem_96A
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{
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public class problem_96A
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{
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public static void Main(string[] args)
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{
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string s = Console.ReadLine();
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if (s.Contains("0000000") || s.Contains("1111111"))
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{
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Console.Write("YES");
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}
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else
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{
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Console.Write("NO");
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}
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}
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}
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}
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