31 lines
803 B
C++
31 lines
803 B
C++
#include <stdio.h>
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#include <string.h>
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#define Min(a,b) a<b?a:b;
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int s[1005],ss[1005],ans[1005][1005],dp[1005];
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int main(){
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int n,m,i,j,k;
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while(~scanf("%d%d",&n,&m),(n+m)){
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memset(dp,0,sizeof(dp));
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memset(ans,0,sizeof(ans));
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ss[0]=0;
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for(i=0;i<n;i++){
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scanf("%d",&s[i]);
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ss[i+1]=ss[i]+s[i];
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}
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for(i=0;i<n;i++){
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for(j=i+1;j<n;j++)
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ans[i][j]=ans[i][j-1]+s[j]*(ss[j]-ss[i]);
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}
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for(i=0;i<n;i++)
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dp[i]=ans[0][i];
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for(i=0;i<m;i++){
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for(j=n-1;j>=0;j--){
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for(k=i-1;k<j;k++)
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dp[j]=Min(dp[j],dp[k]+ans[k+1][j]);
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}
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}
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printf("%d\n",dp[n-1]);
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}
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return 0;
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}
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