比赛 |
NOIP2008集训模拟2 |
评测结果 |
AAAAAAAAAAEEEEEEEEEE |
题目名称 |
沙漠赛道 |
最终得分 |
50 |
用户昵称 |
cuixiaofei |
运行时间 |
0.000 s |
代码语言 |
Pascal |
内存使用 |
0.00 MiB |
提交时间 |
2008-11-11 11:13:26 |
显示代码纯文本
program mirage;
var
chehuo :array[1..4,1..2] of real;
fadongji :array[1..2] of real;
af,bf,abf,bbf :real;
asheng,bsheng,ping :real;
az,bz :real;
shuchu :real;
n,gea,geb :longint;
dui :array[0..100000,1..2] of real;
f1,f2 :text;
procedure init;
var
i,k,ge :longint;
shu :real;
begin
assign(f1,'mirage.in');
reset(f1);
assign(f2,'mirage.out');
rewrite(f2);
fillchar(dui,sizeof(dui),0);
az:=0;
bz:=0;
gea:=0;
geb:=0;
for i:=1 to 4 do
read(f1,chehuo[i,1]);
for i:=1 to 4 do
read(f1,chehuo[i,2]);
readln(f1,fadongji[1],fadongji[2]);
readln(f1,n);
for i:=1 to n do
begin
readln(f1,shu,k);
if k=0 then
begin
inc(gea);
dui[gea,1]:=shu;
az:=az+shu;
end
else
begin
inc(geb);
dui[geb,2]:=shu;
bz:=bz+shu;
end;
end;
end;
procedure main;
var
i :longint;
pingchenga,pingchengb :real;
yinga,yingb :real;
ji :real;
begin
abf:=1;
bbf:=1;
for i:=1 to 4 do
abf:=abf*(1-chehuo[i,1]);
for i:=1 to 4 do
bbf:=bbf*(1-chehuo[i,2]);
af:=1-abf;
bf:=1-bbf;
pingchenga:=fadongji[1]/(fadongji[1]+fadongji[2]);
pingchengb:=1-pingchenga;
asheng:=abf*bf+abf*bbf*pingchenga;
bsheng:=bbf*af+abf*bbf*pingchengb;
ping:=af*bf;
// ****************** gailv *******************
yinga:=az+bz-az*2;
yingb:=az+bz-bz*2;
ji:=1;
for i:=1 to gea do
ji:=ji*dui[i,1];
for i:=1 to geb do
ji:=ji*dui[i,2];
ji:=exp((1/(gea+geb))*ln(ji));
ji:=az+bz-ji*(gea+geb);
shuchu:=yinga*asheng+yingb*bsheng+ji*ping;
end;
procedure print;
begin
writeln(f2,asheng:0:2,' ',bsheng:0:2,' ',ping:0:2);
writeln(f2,shuchu:0:2);
close(f1);
close(f2);
end;
begin
init;
main;
print;
end.