46 lines
1.2 KiB
C++
46 lines
1.2 KiB
C++
//http://acm.hdu.edu.cn/showproblem.php?pid=4261
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#include<cstdio>
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#include<cstring>
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#include<algorithm>
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#include<queue>
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#include<cassert>
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using namespace std;
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typedef long long LL;
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const int maxn=2005;
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const int maxm=30;
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int n,m,a[maxn];
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LL f[maxm][maxn],b[maxn][maxn];
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int main()
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{
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#ifdef local
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freopen("pro.in","r",stdin);
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#endif
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while(scanf("%d%d",&n,&m)==2&&!(n==0&&m==0))
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{
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for(int i=1;i<=n;i++) scanf("%d",&a[i]);
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for(int i=1;i<=n;i++)
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{
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priority_queue<LL> L; priority_queue<LL,vector<LL>,greater<LL> > R;
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L.push(a[i]);
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LL SL=a[i],SR=0;
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for(int j=i+1;j<=n;j++)
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{
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if(a[j]>L.top()) { R.push(a[j]); SR+=a[j]; }
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else { L.push(a[j]); SL+=a[j]; }
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while((int)L.size()-(int)R.size()>=2) { SL-=L.top(); SR+=L.top(); R.push(L.top()); L.pop(); }
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while((int)R.size()-(int)L.size()>=1) { SR-=R.top(); SL+=R.top(); L.push(R.top()); R.pop(); }
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b[i][j]=L.top()*L.size()-SL+SR-L.top()*R.size();
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// printf("zws(%d,%d)=%d\n",i,j,L.top());
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// printf("b(%d,%d)=%d\n",i,j,b[i][j]);
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}
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}
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memset(f,0x3f,sizeof(f));
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f[0][0]=0;
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for(int i=1;i<=m;i++)
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for(int j=i;j<=n;j++)
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for(int k=i-1;k<j;k++)
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f[i][j]=min(f[i][j],f[i-1][k]+b[k+1][j]);
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printf("%lld\n",f[m][n]);
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}
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return 0;
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} |