Type: Default 1000ms 256MiB

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Beginning

题目描述

你有四个数字 N1N2N3N4N_1 N_2 N_3 N_4,确定是否可以将它们安排在数字序列“ 19741974”中。

输入格式

一行四个数字 N1,N2,N3,N4N_1,N_2,N_3,N_4

输出格式

如果可以拼成 19741974 ,输出 YESYES ,否则输出 NONO

样例 #1

样例输入 #1

1 7 9 4

样例输出 #1

YES

样例 #2

样例输入 #2

1 9 7 4

样例输出 #2

YES

样例 #3

样例输入 #3

1 2 9 1

样例输出 #3

NO

样例 #4

样例输入 #4

4 9 0 8

样例输出 #4

NO

数据范围

  • 0  N1, N2, N3, N4  9 0\ \leq\ N_1,\ N_2,\ N_3,\ N_4\ \leq\ 9

20240528集训

Not Attended
Status
Done
Rule
IOI
Problem
6
Start at
2024-5-28 19:00
End at
2024-5-28 21:00
Duration
2 hour(s)
Host
Partic.
16