📄 usaco 1_2_1 milking cows 题解_leokan的blog.mht
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<DIV class=3Dtit>USACO 1.2.1 Milking Cows =CC=E2=BD=E2</DIV>
<DIV class=3Ddate>2007=C4=EA12=D4=C230=C8=D5 =D0=C7=C6=DA=C8=D5 =
17:24</DIV>
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=
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=A3=BC=AF=D1=B5=B6=D3=A1=A3</P>
=
<P>=D5=FD=BA=C3=A3=AC=BF=EC=B5=BD=C6=DA=C4=A9=BF=BC=C1=CB=A3=AC=BF=BC=B5=C3=
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=
<P>=C1=ED=CD=E2USACO=D7=EEchapter4,chapter5=B5=C4=CC=E2=C4=BF=B6=BC=D7=F6=
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=
<P>-------------------------------=BF=C9=C1=AF=B5=BD=C3=BB=C8=CB=B8=F8=CB=
=FC=C3=FC=C3=FB=B5=C4=B7=D6=B8=EE=CF=DF----------------------------------=
--------------------</P>
<H2>USACO 1.2.1 Milking Cows</H2>
<DIV class=3Dt_msgfont>
<P>Milking Cows<BR><BR>Three farmers rise at 5 am each morning and =
head=20
for the barn to milk three cows. The first farmer begins milking =
his cow=20
at time 300 (measured in seconds after 5 am) and ends at time =
1000. The=20
second farmer begins at time 700 and ends at time 1200. The third =
farmer=20
begins at time 1500 and ends at time 2100. The longest continuous =
time=20
during which at least one farmer was milking a cow was 900 seconds =
(from=20
300 to 1200). The longest time no milking was done, between the =
beginning=20
and the ending of all milking, was 300 seconds (1500 minus 1200).=20
<BR><BR>Your job is to write a program that will examine a <SPAN=20
class=3Dt_tag href=3D"tag.php?name=3Dlis">lis</SPAN>t of beginning =
and ending=20
times for N (1 <=3D N <=3D 5000) farmers milking N cows and =
compute (in=20
seconds): <BR><BR>The longest time interval at least one cow was =
milked.=20
<BR>The longest time interval no cows were being milked. =
<BR>PROGRAM NAME:=20
milk2<BR>INPUT FORMAT<BR>Line 1: The single=20
integer <BR>Lines 2..N+1: Two non-negative =
integers=20
less than 1000000, the starting and ending time in seconds after =
0500=20
<BR><BR>SAMPLE INPUT (file milk2.in) <BR>3<BR>300 1000<BR>700 =
1200<BR>1500=20
2100<BR><BR><BR>OUTPUT FORMAT<BR>A single line with two integers =
that=20
represent the longest continuous time of milking and the longest =
idle=20
time. <BR>SAMPLE OUTPUT (file milk2.out)<BR>900 =
300<BR><BR><BR><BR>Milking=20
Cows<BR><BR>=BC=B7=C5=A3=C4=CC<BR><BR>=D2=EB by=20
=
Jeru<BR><BR>=C8=FD=B8=F6=C5=A9=C3=F1=C3=BF=CC=EC=C7=E5=B3=BF5=B5=E3=C6=F0=
=B4=B2=A3=AC=C8=BB=BA=F3=C8=A5=C5=A3=C5=EF=B8=F83=CD=B7=C5=A3=BC=B7=C4=CC=
=A1=A3=B5=DA=D2=BB=B8=F6=C5=A9=C3=F1=D4=DA300=CA=B1=BF=CC(=B4=D35=B5=E3=BF=
=AA=CA=BC=BC=C6=CA=B1=A3=AC=C3=EB=CE=AA=B5=A5=CE=BB)=B8=F8=CB=FB=B5=C4=C5=
=A3=BC=B7=C4=CC=A3=AC=D2=BB=D6=B1=B5=BD1000=CA=B1=BF=CC=A1=A3=B5=DA=B6=FE=
=B8=F6=C5=A9=C3=F1=D4=DA700=CA=B1=BF=CC=BF=AA=CA=BC=A3=AC=D4=DA=20
=
1200=CA=B1=BF=CC=BD=E1=CA=F8=A1=A3=B5=DA=C8=FD=B8=F6=C5=A9=C3=F1=D4=DA150=
0=CA=B1=BF=CC=BF=AA=CA=BC2100=CA=B1=BF=CC=BD=E1=CA=F8=A1=A3=C6=DA=BC=E4=D7=
=EE=B3=A4=B5=C4=D6=C1=C9=D9=D3=D0=D2=BB=B8=F6=C5=A9=C3=F1=D4=DA=BC=B7=C4=CC=
=B5=C4=C1=AC=D0=F8=CA=B1=BC=E4=CE=AA900=C3=EB(=B4=D3300=CA=B1=BF=CC=B5=BD=
1200=CA=B1=BF=CC)=A3=AC=B6=F8=D7=EE=B3=A4=B5=C4=CE=DE=C8=CB=BC=B7=C4=CC=B5=
=C4=C1=AC=D0=F8=CA=B1=BC=E4(=B4=D3=BC=B7=C4=CC=BF=AA=CA=BC=D2=BB=D6=B1=B5=
=BD=BC=B7=C4=CC=BD=E1=CA=F8)=CE=AA300=C3=EB(=B4=D31200=CA=B1=BF=CC=B5=BD1=
500=CA=B1=BF=CC)=A1=A3<BR><BR>=C4=E3=B5=C4=C8=CE=CE=F1=CA=C7=B1=E0=D2=BB=B8=
=F6=B3=CC=D0=F2=A3=AC=B6=C1=C8=EB=D2=BB=B8=F6=D3=D0N=B8=F6=C5=A9=C3=F1(1 =
<=3D N <=3D =
5000)=BC=B7N=CD=B7=C5=A3=B5=C4=B9=A4=D7=F7=CA=B1=BC=E4=C1=D0=B1=ED=A3=AC=BC=
=C6=CB=E3=D2=D4=CF=C2=C1=BD=B5=E3(=BE=F9=D2=D4=C3=EB=CE=AA=B5=A5=CE=BB):<=
BR><BR>=D7=EE=B3=A4=D6=C1=C9=D9=D3=D0=D2=BB=C8=CB=D4=DA=BC=B7=C4=CC=B5=C4=
=CA=B1=BC=E4=B6=CE=A1=A3=20
=
<BR>=D7=EE=B3=A4=B5=C4=CE=DE=C8=CB=BC=B7=C4=CC=B5=C4=CA=B1=BC=E4=B6=CE=A1=
=A3 <BR>PROGRAM NAME: milk2<BR>INPUT FORMAT<BR>Line 1:=20
<BR>=D2=BB=B8=F6=D5=FB=CA=FDN=A1=A3<BR><BR>Lines 2..N+1:=20
=
<BR>=C3=BF=D0=D0=C1=BD=B8=F6=D0=A1=D3=DA1000000=B5=C4=B7=C7=B8=BA=D5=FB=CA=
=FD=A3=AC=B1=ED=CA=BE=D2=BB=B8=F6=C5=A9=C3=F1=B5=C4=BF=AA=CA=BC=CA=B1=BF=CC=
=D3=EB=BD=E1=CA=F8=CA=B1=BF=CC=A1=A3<BR><BR><BR>SAMPLE INPUT (file=20
milk2.in) <BR>3<BR>300 1000<BR>700 1200<BR>1500 =
2100<BR>=A1=A1<BR>OUTPUT=20
=
FORMAT<BR>=D2=BB=D0=D0=A3=AC=C1=BD=B8=F6=D5=FB=CA=FD=A3=AC=BC=B4<SPAN =
class=3Dt_tag=20
=
href=3D"tag.php?name=3D%CC%E2%C4%BF">=CC=E2=C4=BF</SPAN>=CB=F9=D2=AA=C7=F3=
=B5=C4=C1=BD=B8=F6=B4=F0=B0=B8=A1=A3<BR><BR>SAMPLE OUTPUT=20
(file milk2.out)<BR>900 300</P>
=
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ok=3D1&u=3Dhttp://hi.baidu.com/sys/reg/' =
target=3D'_blank'>=D7=A2=B2=E1</a>");
document.write(" | <a =
href=3D'http://passport.baidu.com/?login&tpl=3Dsp&tpl_reg=3Dsp&u=3D"+myre=
f+"'>=B5=C7=C2=BC</a>");
</SCRIPT>
=20
<DIV id=3Dnmerror style=3D"DISPLAY: =
none">*=D0=D5=C3=FB=D7=EE=B3=A4=CE=AA50=D7=D6=BD=DA</DIV></TD></TR>
<TR id=3D1_err style=3D"DISPLAY: none">
<TD> </TD>
<TD>
<DIV class=3Derror id=3D1_err_con></DIV></TD></TR>
<TR>
<TD class=3Df14>=CD=F8=D6=B7=BB=F2=D3=CA=CF=E4=A3=BA</TD>
<TD><INPUT id=3DspBlogCmtURL style=3D"WIDTH: 360px" =
onfocus=3DhidErr(2);=20
tabIndex=3D2 maxLength=3D128 =
onchange=3D"checkeandu('spBlogCmtURL')"=20
name=3DspBlogCmtURL> (=D1=A1=CC=EE)</TD>
<SCRIPT>
G("spBlogCmtor").value=3D"";
G("spBlogCmtURL").value=3D"";
</SCRIPT>
</TR>
<TR id=3D2_err style=3D"DISPLAY: none">
<TD> </TD>
<TD>
<DIV class=3Derror id=3D2_err_con></DIV></TD></TR>
<TR>
<TD class=3Df14 vAlign=3Dtop>=C4=DA=A1=A1=C8=DD=A3=BA</TD>
<TD><TEXTAREA id=3DspBlogCmtText style=3D"WIDTH: 520px; HEIGHT: =
155px" onfocus=3DhidErr(3); tabIndex=3D3 =
name=3DspBlogCmtText></TEXTAREA>
<SCRIPT>
G("spBlogCmtor").value=3DG("spBlogCmtor").defaultValue;
G("spBlogCmtText").value=3D"";
</SCRIPT>
</TD></TR>
<TR id=3D3_err style=3D"DISPLAY: none">
<TD> </TD>
<TD>
<DIV class=3Derror id=3D3_err_con></DIV></TD></TR>
<TR id=3Dvercode>
<TD class=3Df14 vAlign=3Dtop>=D1=E9=D6=A4=C2=EB=A3=BA</TD>
<TD vAlign=3Dtop><INPUT type=3Dhidden=20
=
value=3D5B1BB5FC998D0219E2B1C5C8A9A228B962BFBEE869728A31A7BA5E5B1ADF624D0=
05CE8C5CD49575AD0E3C563CAA872962FC353A2730E50C9FD51076D3B68857F=20
name=3DspVcode> <INPUT id=3DspVerifyKey tabIndex=3D4 maxLength=3D4 =
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