HDU 5701 中位数计数 暴力

#include <cstdio>
#include <iostream>
#include <cstring>
using namespace std;
const int N=1e4+5;
int num
,sum
,l[N*2],r[N*2],a
;
int n;
int get(int x){
int p,ans=0;
memset(sum,0,sizeof(sum));
memset(l,0,sizeof(l));
memset(r,0,sizeof(r));
for(int i=1;i<=n;i++)
{
if(a[i]>x)num[i]=1;
else if(a[i]==x){num[i]=0;p=i;}
else num[i]=-1;
}
l
=1;r
=1;
for(int i=p-1;i>=1;i--)
{sum[i]=sum[i+1]+num[i];l[sum[i]+n]++;}
for(int i=p+1;i<=n;i++)
{sum[i]=sum[i-1]+num[i];r[sum[i]+n]++;}
for(int i=0;i<=2*n-1;i++)ans+=l[i]*r[2*n-i];
return ans;
}
int main()
{
while(~scanf("%d",&n)){
for(int i=1;i<=n;++i)
scanf("%d",&a[i]);
for(int i=1;i<n;++i){
printf("%d ",get(a[i]));
}
printf("%d\n",get(a
));
}
return 0;
}