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psylambda
Algorithms
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master
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Algorithms
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algorithms
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src
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main
/
java
/
MagicCoin.java
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44 lines (38 loc) · 1.4 KB
master
Breadcrumbs
Algorithms
/
algorithms
/
src
/
main
/
java
/
MagicCoin.java
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//小易准备去魔法王国采购魔法神器,购买魔法神器需要使用魔法币,但是小易现在一枚魔法币都没有,但是小易有两台魔法机器可以通过投入x(x可以为0)个魔法币产生更多的魔法币。
//魔法机器1:如果投入x个魔法币,魔法机器会将其变为2x+1个魔法币
//魔法机器2:如果投入x个魔法币,魔法机器会将其变为2x+2个魔法币
//小易采购魔法神器总共需要n个魔法币,所以小易只能通过两台魔法机器产生恰好n个魔法币,小易需要你帮他设计一个投入方案使他最后恰好拥有n个魔法币。
import
java
.
util
.*;
import
java
.
lang
.*;
public
class
MagicCoin
{
public
static
void
main
(
String
[]
args
)
{
Scanner
sc
=
new
Scanner
(
System
.
in
);
while
(
sc
.
hasNext
())
{
String
s
=
sc
.
next
();
double
m
=
compute
(
s
);
System
.
out
.
println
(
String
.
format
(
"%.2f"
,
m
));
}
}
private
static
double
compute
(
String
s
)
{
int
sum
=
0
,
num
=
0
;
int
count
=
0
;
char
last
=
'\0'
;
for
(
char
c
:
s
.
toCharArray
())
{
if
(
c
!=
last
)
{
last
=
c
;
sum
+=
count
;
num
++;
count
=
1
;
}
else
count
++;
}
sum
+=
count
;
//System.out.println(sum+" "+num);
return
(
double
)
sum
/
num
;
}
}
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