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??K8?? =?K8?? ?\??? ????? z???:?? ??:ê8 z???:?? S??? ??k??? K8a.

ên tri

/

4?7 hop

? ? mir

文件读写
1s 10 10 128MB ? D? 1s 10 10 128MB ?

D? 1s 20 5 128MB ? D?

注意事项: 1、文件名(程序名和输入输出文件名)必须使用英文大写。 2、C/C++中函数main()的返回值类型必须是int,程序正常结束时的返回值必须是0。 3、最终测试时,所有编译命令均不打开任何优化开关。 4、只提供Windows格式附加样例文件。 5、特别提醒:评测在Windows下进行。

1

1
1.1

ên /
K8??
?o n /? ù?AT?z?<?? :§1i?: / "3 K ?§ · ? ? # N n ? ?A?u0" ?I?(xi , yi )"\I?O?§ n ~"

/?yòz ??§=z^> ???z? y3???kn?üü?-? ±§????:§? /§??§? U ¤ n

?ê"5?§=??ü?

???? §?@???? n /§??

1.2

?\??
1?1??? 3d? ên§“L: ?ê" êxi , yi §“L1i?: ?I" e5n1§z1?é?K

?U??k?{ ?\§????"

1.3

????
?????K ê§=? U ¤ n / ?ê"

1.4
5 00 10 20 01 11

~?\

2333 3333

1.5
9

~??

1.6
b BCD,

~)?
??:?g?A, B, C, D, E " /?O? ABD, CDE " 2 ABE , ACD, ACE , ADE , BCE , BDE , @o§|¤ 9?n

1.7

ê?5 ?
éu20% ,k30% éu100%

?

ê?§n = 3" ê?§ y??n?:?3?????" ê?§n ≤ 100§ y??ü?:?-?§?I???L10,000"

2
2.1

4?7
K8??
??Xdoge?,??? ? y3k?ü?f§l??mI??0 ? kn??§1i??kai ?§ zg§??Xdoge?±a ? ?ê"5?§doge?7a m"doge??30??f?" ?" ? § ? ? U ? ?3bi ?fp"

§m>4??m>7?

?fm§ ??±‘?(?iZ"

2.2

?\??
1?1?ü? ên, m§?O“L? ?ê?o ? f ê" e5n1§ êai , bi §?O“L,?? ?ê? ?"

z1ü?

2.3

????
?????K ê§??U? ? ?ê"

2.4
3 13

~?\
100 4 10 7 1 11

2.5
101

~??

3

2.6

~)?
1?ga4?§1 ga7?§o U? 101??"

2.7

ê?5 ?
éu20% éu40% éu60% éu100%

?

ê?§n = 1, m ≤ 100, 000" ê?§n ≤ 15, m ≤ 100, 000" ê?§m ≤ 100, 000" ê?§n ≤ 100, 000, m ≤ 1, 000, 000, 000, ai ≤ 10, 000, 1 ≤ bi ≤

m"

3
3.1

? ?
K8??
lck???I 3 ?????I ?é????Lm¤ "l? mx? I ?

ìO\§ le ?y ?I?ìO\" ? ? { ? Xn? ? f§ 1i? ? f ? I ?(xi , yi )" ? f ? ? ? I ? ¤45b "¤± kü?a. ?f? /\0.?//0."A?/§ :???

k???f§???k,? ?k???f" ?f ü???U ? 1?§ ?m??1§~X§éu??//0.? f§ l e ? ??" yk?^1?l ?" : ¤ 3 ? f ÷x? ?? ?§ ? § r LT ? ? § ¤3 \ 1?? ? m ? ?§ l?? \ 1?? ? ?

3.2

?\??
1?1?n? ên, m, T §?O“L?f ?ê??I ‰?" ê???i?xi , yi , ti §“L,??f ??a e5n1§z1ü?

."

3.3

????
??ü? ê§?O“LrLT ??§ x?I?y ?I"

4

3.4
528 01\ 02/ 10/ 11\ 12\

~?\

3.5
31

~??

3.6

~)?
38?ü ?m ???? m???memm"

3.7

ê?5 ?
?310% ?340% ?340% ?340% éu100%

?

ê?§n = 1" ê?§n ≤ 1, 000" ê?§m ≤ 1, 000" ê?§T ≤ 1, 000, 000" ê?§n ≤ 100, 000, m ≤ 1, 000, 000, 000, T ≤ 1018 " T ≤ 100, 000 ≤ 100, 000 ≤ 100, 000 ≤ 1, 000

?N/§ê?‰?XeL¤?? ??:?? n m 1 2,3 4,5 6,7 8 9,10 11,12,13 14,15,16 17,18,19,20 ≤ 1, 000 ≤ 1, 000 =1 ≤ 1, 000 ≤ 1, 000 =1 ≤ 1, 000 ≤ 1, 000

≤ 100, 000

5


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