ACdream训练赛系列のJava专场
2024-08-27 09:52:15
/*
* this code is made by mhy12345
* Problem: 1669
* Verdict: Accepted
* Submission Date: 2015-04-21 13:39:02
* Time: 140MS
* Memory: 23196KB
*/
import java.util.*;
import java.math.*; public class Main
{
static public void main(String args[])
{
Scanner in=new Scanner(System.in);
while (in.hasNext())
{
BigInteger n=in.nextBigInteger();
BigInteger l,r,mid;
l=new BigInteger("0");
r=n.add(BigInteger.valueOf(1));
while (r.subtract(l).compareTo(BigInteger.valueOf(1))>0)
{
// System.out.println(l);
// System.out.println(r);
mid=(r.add(l)).divide(BigInteger.valueOf(2));
if (mid.multiply(mid).compareTo(n)>0)
{
r=mid;
}else
{
l=mid;
}
}
System.out.println(l.remainder(BigInteger.valueOf(2)));
}
}
}
B
/*
* this code is made by mhy12345
* Problem: 1670
* Verdict: Accepted
* Submission Date: 2015-04-21 15:01:14
* Time: 172MS
* Memory: 27336KB
*/
import java.util.*;
import java.math.*;
import java.io.File;
import java.io.IOException; public class Main
{
static public void main(String args[])throws IOException
{
Scanner in = new Scanner(System.in);
//Scanner in = new Scanner(new File("input.txt"));
while (in.hasNext())
{
BigInteger n=in.nextBigInteger();
BigInteger x=new BigInteger("1");
for (int i=2;i<=10000000;i++)
{
boolean flag=true;
for (int j=2;j<i;j++)
{
if (i%j==0)
{
flag=false;
break;
}
}
if (!flag)continue;
if (x.multiply(BigInteger.valueOf(i)).compareTo(n)>0)
break;
x=x.multiply(BigInteger.valueOf(i));
}
System.out.println(x.toString());
}
C
/*
* this code is made by mhy12345
* Problem: 1668
* Verdict: Accepted
* Submission Date: 2015-04-21 17:43:49
* Time: 992MS
* Memory: 152756KB
*/
import java.io.*;
import java.math.*;
import java.util.*; public class Main
{
static public void main(String args[])throws IOException
{
Scanner in = new Scanner(System.in);
int n;
while (in.hasNext())
{
n=in.nextInt();
int a1,b1,a2,b2,a3,b3;
a1=in.nextInt();
b1=in.nextInt();
a2=in.nextInt();
b2=in.nextInt();
a3=in.nextInt();
b3=in.nextInt();
BigDecimal v1=BigDecimal.valueOf(a1).divide(BigDecimal.valueOf(b1),100,BigDecimal.ROUND_HALF_EVEN);
BigDecimal v2=BigDecimal.valueOf(a2).divide(BigDecimal.valueOf(b2),100,BigDecimal.ROUND_HALF_EVEN);
BigDecimal v3=BigDecimal.valueOf(a3).divide(BigDecimal.valueOf(b3),100,BigDecimal.ROUND_HALF_EVEN);
BigDecimal dp[][]=new BigDecimal[110][];
for (int i=0;i<110;i++)
dp[i]=new BigDecimal[110];
for (int i=0;i<110;i++)
for (int j=0;j<110;j++)
dp[i][j]=new BigDecimal("0");
BigDecimal poss[][]=new BigDecimal[110][];
for (int i=0;i<110;i++)
poss[i]=new BigDecimal[110];
for (int i=0;i<110;i++)
for (int j=0;j<110;j++)
poss[i][j]=new BigDecimal("0");
dp[n][n]=BigDecimal.ZERO;
poss[n][n]=BigDecimal.ONE;
BigDecimal va=v1.add(v3.divide(BigDecimal.valueOf(2),100,BigDecimal.ROUND_HALF_EVEN));
BigDecimal vb=v2.add(v3.divide(BigDecimal.valueOf(2),100,BigDecimal.ROUND_HALF_EVEN));
for (int i=n;i>=1;i--)
{
for (int j=n;j>=i;j--)
{
if (j!=i && i!=1)
{
poss[i-1][j]=poss[i-1][j].add(poss[i][j].multiply(v2));
dp[i-1][j]=dp[i-1][j].add(dp[i][j].add(poss[i][j]).multiply(v2));
poss[i][j-1]=poss[i][j-1].add(poss[i][j].multiply(v3));
dp[i][j-1]=dp[i][j-1].add(dp[i][j].add(poss[i][j]).multiply(v3));
poss[i-1][j-1]=poss[i-1][j-1].add(poss[i][j].multiply(v1));
dp[i-1][j-1]=dp[i-1][j-1].add(dp[i][j].add(poss[i][j]).multiply(v1));
//System.out.println(poss[i][j-1] +" "+ poss[i][j]);
}else if (i==1 && j!=i)
{
poss[i][j-1]=poss[i][j-1].add(poss[i][j]);
dp[i][j-1]=dp[i][j-1].add(dp[i][j].add(poss[i][j]));
}else if (j==i && i!=1)
{
poss[i-1][j-1]=poss[i-1][j-1].add(poss[i][j].multiply(va));
dp[i-1][j-1]=dp[i-1][j-1].add((dp[i][j].add(poss[i][j])).multiply(va));
poss[i-1][j]=poss[i-1][j].add(poss[i][j].multiply(vb));
dp[i-1][j]=dp[i-1][j].add((dp[i][j].add(poss[i][j])).multiply(vb));
}
}
}
/*
for (int i=1;i<=n;i++)
{
for (int j=1;j<=n;j++)
{
System.out.print(dp[i][j]+" ");
}
System.out.println();
}
*/
// System.out.println(dp[1][1]);
System.out.println(dp[1][1].setScale(50, BigDecimal.ROUND_HALF_EVEN).toString());
/*
double vv1,vv2,vv3;
vv1=(double)a1/b1;
vv2=(double)a2/b2;
vv3=(double)a3/b3;
double dp[][]=new double[110][];
for (int i=0;i<110;i++)
dp[i]=new double[110];
double poss[][]=new double[110][];
for (int i=0;i<110;i++)
poss[i]=new double[110];
dp[n][n]=0;
poss[n][n]=1;
for (int i=n;i>=1;i--)
{
for (int j=n;j>=i;j--)
{
if (j!=i && i!=1)
{
//System.out.println("hehe"+i+" "+j);
poss[i-1][j]+=poss[i][j]*vv2;
dp[i-1][j]+=(dp[i][j]+poss[i][j])*vv2;
poss[i][j-1]+=poss[i][j]*vv3;
dp[i][j-1]+=(dp[i][j]+poss[i][j])*vv3;
poss[i-1][j-1]+=poss[i][j]*vv1;
dp[i-1][j-1]+=(dp[i][j]+poss[i][j])*vv1;
//System.out.println(poss[i][j-1] +" "+ poss[i][j]);
}else if (i==1 && j!=i)
{
poss[i][j-1]+=poss[i][j];
dp[i][j-1]+=dp[i][j]+poss[i][j];
}else if (j==i && i!=1)
{
poss[i-1][j-1]+=poss[i][j]*(vv1+vv3/2);
dp[i-1][j-1]+=(dp[i][j]+poss[i][j])*(vv1+vv3/2);
poss[i-1][j]+=poss[i][j]*(vv2+vv3/2);
dp[i-1][j]+=(dp[i][j]+poss[i][j])*(vv2+vv3/2);
}
}
}
for (int i=1;i<=n;i++)
{
for (int j=1;j<=n;j++)
{
System.out.print(poss[i][j]+" ");
}
System.out.println();
}
System.out.println(dp[1][1]);
//System.out.println(poss[1][1]);
*/
}
}
};
剩下两道题简直有意思。。。。。不写了。
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