标签:des style color java os strong io for
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1 3HintFor the second case, {3},{5,3,2},{4,5,3,2,1} are Bestcoder Sequence.
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<strong><span style="font-size:18px;">#include<iostream> #include<cstdio> #include<cstring> #include<algorithm> #define M 100001 #define base 40000 using namespace std; int a[M],dp[M]; int main() { int n,m,x; while(scanf("%d%d",&n,&m)!=EOF){ for(int i=0;i<n;++i){ scanf("%d",&a[i]); if(a[i]==m) x=i; } memset(dp,0,sizeof dp); int ans=0; for(int i=x+1;i<n;++i){ if(a[i]>m) ans++; //大的加小的减 else ans--; dp[ans+base]++; //记录出现该状态的次数 } ans=++dp[base];<span style="white-space:pre"> </span>//当状态数为base,才满足中位数 int tmp=0; for(int i=x-1;i>=0;--i){ if(a[i]>m) tmp++; else tmp--; ans+=dp[-tmp+base];<span style="white-space:pre"> </span>状态相加为base的个数 } cout<<ans<<endl; } return 0; }</span></strong>
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HDU 4908——BestCoder Sequence,布布扣,bubuko.com
标签:des style color java os strong io for
原文地址:http://blog.csdn.net/u014141559/article/details/38364655