Given an increasing sequence S of N integers, the median is the number at the middle position. For example, the median of S1={11, 12, 13, 14} is 12, and the median of S2={9, 10, 15, 16, 17} is 15. The median of two sequences is defined to be the median of the nondecreasing sequence which contains all the elements of both sequences. For example, the median of S1 and S2 is 13.
Given two increasing sequences of integers, you are asked to find their median.
Input
Each input file contains one test case. Each case occupies 2 lines, each gives the information of a sequence. For each sequence, the first positive integer N (<=1000000) is the size of that sequence. Then N integers follow, separated by a space. It is guaranteed that all the integers are in the range of long int.
Output
For each test case you should output the median of the two given sequences in a line.
Sample Input4 11 12 13 14 5 9 10 15 16 17Sample Output
13
#include<cstdio>
#include<vector>
#include<algorithm>
#define MAX 2000005
using namespace std;
long long v[MAX];
int main(int argc,char *argv[])
{
long long n,m;
long long i,j,temp;
scanf("%lld",&n);
for(i=0;i<n;i++)
{
scanf("%lld",&temp);
v[i]=temp;
}
scanf("%lld",&m);
for(j=0;j<m;j++)
{
scanf("%lld",&temp);
v[i]=temp;
i++;
}
sort(v,v+m+n);
if((m+n)%2==0)
printf("%lld\n",v[(m+n)/2-1]);
else
printf("%lld\n",v[(m+n)/2]);
return 0;
}
#include<cstdio>
#define MAX 1000005
using namespace std;
void Output(int N[],int M[],int ans,int n,int m,int count);
int N[MAX],M[MAX];
int main(int argc,char *argv[])
{
int n,m;
int count,i,j;
scanf("%d",&n);
for(i=0;i<n;i++)
scanf("%d",&N[i]);
scanf("%d",&m);
for(i=0;i<m;i++)
scanf("%d",&M[i]);
i=j=0;
count=0;
int ans;
while(i<n&&j<m)
{
if(N[i]<M[j])
{
ans=N[i];
count++;
i++;
}
else if(N[i]==M[j])
{
ans=N[i];
count++;
i++;
Output(N,M,ans,n,m,count);
count++;
j++;
}
else
{
ans=M[j];
count++;
j++;
}
Output(N,M,ans,n,m,count);
}
if(i==n)
{
while(j<m)
{
ans=M[j];
count++;
j++;
Output(N,M,ans,n,m,count);
}
}
else if(j==m)
{
while(i<n)
{
ans=N[i];
count++;
i++;
Output(N,M,ans,n,m,count);
}
}
return 0;
}
void Output(int N[],int M[],int ans,int n,int m,int count)
{
if((m+n)%2==0)
{
if(count==(m+n)/2)
{
printf("%d\n",ans);
return;
}
}
else
{
if(count==(m+n)/2+1)
{
printf("%d\n",ans);
return;
}
}
}
Pat(Advanced Level)Practice--1029(Median),布布扣,bubuko.com
Pat(Advanced Level)Practice--1029(Median)
原文：http://blog.csdn.net/cstopcoder/article/details/20831379