41 lines
910 B
C++
41 lines
910 B
C++
#include<stdio.h>
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#include<algorithm>
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#define min(a,b) a<b?a:b
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int n,k;
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int thing[2001];
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int select[2001][1001];
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int cmp(const void *a,const void *b)
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{
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return *((int*)a)-*((int*)b);
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}
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int dp()
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{
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qsort(thing+1,n,sizeof(int),cmp);
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select[0][0]=0;
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for(int j=1;j<=n;j++)
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{
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select[j][0]=0;
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for(int i=1;i<=j/2;i++)
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{
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if(j-1>=2*i)
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{
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select[j][i]=min(select[j-1][i],select[j-2][i-1]+(thing[j]-thing[j-1])*(thing[j]-thing[j-1]));
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}
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else
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select[j][i]=select[j-2][i-1]+(thing[j]-thing[j-1])*(thing[j]-thing[j-1]);
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}
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}
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printf("%d\n",select[n][k]);
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return 0;
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}
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int main()
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{
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while(scanf("%d%d",&n,&k)!=EOF&&n>=2*k&&n<2000&&k>=1)
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{
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for(int i=1;i<=n;i++)
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scanf("%d",&thing[i]);
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dp();
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}
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return 0;
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}
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