// Slower C++ solution:
#include<bits/stdc++.h>



using namespace std;



#define all(v)				((v).begin()), ((v).end())

#define allr(v)				((v).rbegin()), ((v).rend())

#define sz(v)				((int)((v).size()))

#define ll long long

#define pb					push_back

#define fIO ios_base::sync_with_stdio(0);cin.tie(0);



const ll oo = 1e8;

const double pi = 3.1415926535897;





const double EPS = (1e-7);

int dcmp(double x, double y) {	return fabs(x-y) <= EPS ? 0 : x < y ? -1 : 1;	}





typedef vector<int>                vi;

typedef vector<pair<int,int>>      vii;

typedef vector<ll>                 vll;

typedef vector<double>             vd;

typedef vector< vi >               vvi;

typedef vector< vd >               vvd;

typedef vector<string>             vs;

typedef pair<int, int>             pii;



/**

    * PLEASEEE READDD PROBLEEEM CARFULLY ****

    * Always check for OVERFLOW ll vs int

    * Always check for array bounds

    * Check for function return

    * READ OUTPUT SECTION AGAIN!!!

**/



struct edge{

    int from, to, w;



    edge(){}

    edge(int x, int y, int we): from(x), to(y), w(we){}



    bool operator < (const edge &rhs) const{

        return w > rhs.w;

    }



};



const int N = 400 + 5;



ll dp[N][N];

ll pre[N];

int a[N];



ll sol(int l ,int r) {

    if(l == r) return 0;



    ll &ret = dp[l][r];

    if(ret != -1) return ret;



    ret = 1e18L;

    for(int i = l; i < r; i++) {

        ret = min(ret, sol(l, i) + sol(i + 1, r) + pre[r + 1] - pre[l]);

    }



    return ret;

}







int main(){

    fIO

//    freopen("", "r", stdin);

//    freopen("", "w", stdout);



    memset(dp, -1, sizeof(dp));



    int n;

    cin >> n;



    for(int i = 0; i < n; i++) cin >> a[i];



    for(int i = 0; i < n; i++) pre[i + 1] = pre[i] + a[i];



    cout << sol(0, n - 1) << "\n";

}














// Faster C++ solution for the same problem (measured speedup: 2.2670932265960664x):
#include<bits/stdc++.h>

#include<cstdio>

#define ll long long

#define fi first

#define se second

using namespace std;

typedef pair<ll,ll> lp;

const int inf=0x3f3f3f3f;

const int mod=1e9+7;

void A() {

    int n;

    cin>>n;

    vector<int> a(n,0);

    for(int i=0; i<n; i++)

        cin>>a[i];

    vector<int> dp(n+1,inf);

    dp[0]=0;

    for(int i=1; i<n; i++) {

        dp[i]=min(dp[i],dp[i-1]+abs(a[i]-a[i-1]));

        if(i>=2)

            dp[i]=min(dp[i],dp[i-2]+abs(a[i]-a[i-2]));

    }

    cout<<dp[n-1]<<endl;



}

void B() {

    int n,k;

    cin>>n>>k;

    vector<int> dp(n+1,inf);

    vector<int> h(n,0);

    for(int i=0; i<n; i++)

        cin>>h[i];

    dp[0]=0;

    for(int i=1; i<n; i++) {

        for(int len=1; len<=min(k+1,i+1); len++) {

            int j=i-len+1;

            dp[i]=min(dp[i],dp[j]+abs(h[j]-h[i]));

        }

    }

    cout<<dp[n-1]<<endl;

}

void C() {

    int n;

    cin>>n;

    vector<vector<int>> a(n,vector<int>(3,0));

    for(int i=0; i<n; i++)

        cin>>a[i][0]>>a[i][1]>>a[i][2];

    vector<vector<int>> dp(n,vector<int>(3,0));

    dp[0][0]=a[0][0];

    dp[0][1]=a[0][1];

    dp[0][2]=a[0][2];

    for(int i=1; i<n; i++) {

        for(int j=0; j<3; j++) {

            for(int k=0; k<3; k++) {

                if(j==k)

                    continue;

                dp[i][j]=max(dp[i][j],dp[i-1][k]+a[i][j]);

                //cout<<dp[i][j]<<endl;

            }

        }

    }

    cout<<max(dp[n-1][0],max(dp[n-1][1],dp[n-1][2]))<<endl;

}

void D() {

    ll n,W;

    cin>>n>>W;

    vector<lp> p;

    for(int i=0; i<n; i++) {

        ll a,b;

        cin>>a>>b;

        p.emplace_back(a,b);

    }

    sort(p.begin(),p.end());

    vector<ll> dp(W+1,0);

    for(int i=0; i<n; i++) {

        for(int j=W; j>=p[i].first; j--) {

            if(j>0)

                dp[j]=max(dp[j],dp[j-1]);

            dp[j]=max(dp[j],dp[j-p[i].fi]+p[i].se);

        }

    }

    cout<<dp[W]<<endl;



}

void E() {

    //价值比较小，将dp[i]转化为获得当前i的价值的最小体积，然后根据W寻找符合要求的解；

    int n,W;

    cin>>n>>W;

    vector<ll> w(n,0);

    vector<ll> v(n,0);

    for(int i=0; i<n; i++)

        cin>>w[i]>>v[i];

    vector<ll> dp(100005,inf);

    dp[0]=0;

    int res=0;

    for(int i=0; i<n; i++) {

        for(int j=1e5; j>=v[i]; j--) {

            dp[j]=min(dp[j],dp[j-v[i]]+w[i]);

            if(dp[j]<=W) {

                res=max(res,j);

            }

        }

    }

    cout<<res<<endl;



}

void F() {

    string s,t;

    cin>>s>>t;

    int n=s.size(),m=t.size();

    vector<vector<int>> dp(n+1,vector<int>(m+1,0));

    for(int i=1; i<=n; i++) {

        for(int j=1; j<=m; j++) {

            char a=s[i-1],b=t[j-1];

            if(a==b) {

                dp[i][j]=max(dp[i][j],dp[i-1][j-1]+1);

            }

            dp[i][j]=max(dp[i][j],max(dp[i-1][j],dp[i][j-1]));

        }

    }

    int i=n,j=m;

    stack<char> st;

    while(i!=0&&j!=0) {

        char a=s[i-1],b=t[j-1];

        if(a==b) {

            st.push(a);

            j--;

            i--;

        } else {

            if(dp[i][j]==dp[i-1][j])

                i--;

            else

                j--;

        }

    }

    string res;

    while(!st.empty()) {

        res+=st.top();

        st.pop();

    }

    cout<<res<<endl;

}

int Ghelper(vector<int>& dp,vector<vector<int>>& edge,int cur,int& ans) {

    if(dp[cur]!=-1)

        return dp[cur];

    int res=0;

    for(auto nb:edge[cur]) {

        res=max(res,Ghelper(dp,edge,nb,ans)+1);

    }

    ans=max(ans,res);

    dp[cur]=res;

    return res;

}

void G() {

    int n,m;

    cin>>n>>m;

    vector<vector<int>> edge(n+1,vector<int>());

    for(int i=0; i<m; i++) {

        int x,y;

        cin>>x>>y;

        edge[x].push_back(y);

    }

    vector<int> dp(n+1,-1);

//    vector<bool> vis(n+1,0);

    int res=0;

    for(int i=1; i<=n; i++) {

//        if(vis[i]) continue;

//        vis[i]=true;

        Ghelper(dp,edge,i,res);

    }

    cout<<res<<endl;

}

void H() {

    int H,W;

    cin>>H>>W;

    vector<vector<char>> grid(H+1,vector<char>(W+1,'.'));

    vector<vector<ll>> dp(H+1,vector<ll>(W+1,0));

    for(int i=1; i<=H; i++) {

        for(int j=1; j<=W; j++) {

            cin>>grid[i][j];

        }

    }

    dp[1][1]=1;

    for(int i=1; i<=H; i++) {

        for(int j=1; j<=W; j++) {

            if(i==1&&j==1)

                continue;

            if(grid[i][j]=='#')

                dp[i][j]=0;

            else {

                dp[i][j]=(dp[i-1][j]+dp[i][j-1])%mod;

            }

        }

    }

    cout<<dp[H][W]<<endl;

}

void I() {

    int n;

    cin>>n;

    vector<vector<double>> dp(n+1,vector<double>(n+1,0.0));

    vector<double> p(n,0.0);

    for(int i=0; i<n; i++)

        cin>>p[i];

    dp[0][0]=1.0;

    for(int i=1; i<=n; i++) {

        for(int j=0; j<=i; j++) {

            if(j>0)

                dp[i][j]+=dp[i-1][j-1]*p[i-1];

            dp[i][j]+=dp[i-1][j]*(1-p[i-1]);

        }

    }

    double res=0.0;

    for(int i=(n+1)/2; i<=n; i++)

        res+=dp[n][i];

    printf("%.10f\n",res);

}

double JHelper(vector<vector<vector<double>>>& dp,int a,int b,int c,int n) {

    //cout<<a<<" "<<b<<" "<<c<<endl;

    if(a==0&&b==0&&c==0)

        return 0;

    if(dp[a][b][c]>0)

        return dp[a][b][c];

    double sum=a+b+c;

    double ans=1.0*n/sum;

    if(a)

        ans+=JHelper(dp,a-1,b,c,n)*(1.0*a/sum);

    if(b)

        ans+=JHelper(dp,a+1,b-1,c,n)*(1.0*b/sum);

    if(c)

        ans+=JHelper(dp,a,b+1,c-1,n)*(1.0*c/sum);

    dp[a][b][c]=ans;

    return ans;

}

void J() {

    int n;

    cin>>n;

    vector<int> a(n,0);

    for(int i=0; i<n; i++)

        cin>>a[i];

    int cnt[4]= {0,0,0,0};

    for(int i:a) {

        cnt[i]++;

    }

    //cout<<"OK"<<endl;

    vector<vector<vector<double>>> dp(n+1,vector<vector<double>>(n+1,vector<double>(n+1,-1.0)));

    printf("%.13f\n",JHelper(dp,cnt[1],cnt[2],cnt[3],n));

}

//int KHelper(vector<int>& a,vector<int>& dp,int cur,int n)

//{

//    cout<<cur<<" "<<endl;

//    if(dp[cur]!=-1) return dp[cur];

//    dp[cur]=0;

//    for(int i=0;i<n&&cur>=a[i];i++){

//        dp[cur]|=1-KHelper(a,dp,cur-a[i],n);

//        if(dp[cur]==1) break;

//    }

//    return dp[cur];

//}

void K() {

    int n,k;

    cin>>n>>k;

    vector<int> a(n+1,0);

    vector<int> dp(k+3,-1);

    for(int i=0; i<n; i++) {

        cin>>a[i];

    }

//    if(KHelper(a,dp,k,n)==1) cout<<"First"<<endl;

//    else cout<<"Second"<<endl;

    dp[0]=0;

    for(int i=1; i<=k; i++) {

        dp[i]=0;

        for(int j=0; j<n&&a[j]<=i; j++) {

            dp[i]|=1-dp[i-a[j]];

            if(dp[i]==1)

                break;

        }

    }

    if(dp[k]==1)

        cout<<"First"<<endl;

    else

        cout<<"Second"<<endl;

}

void L() {

    int n;

    cin>>n;

    vector<ll> a(n+1,0);

    for(int i=1; i<=n; i++)

        cin>>a[i];

    vector<vector<ll>> dp(n+2,vector<ll>(n+2,0));

    for(int len=1; len<=n; len++) {

        for(int i=1; i+len<=n+1; i++) {

            int j=i+len-1;

            if((n-len)%2==0) {

                dp[i][j]=max(dp[i+1][j]+a[i],dp[i][j-1]+a[j]);

            } else {

                dp[i][j]=min(dp[i+1][j]-a[i],dp[i][j-1]-a[j]);

            }

        }

    }

    cout<<dp[1][n]<<endl;

}

void M() {

    int n,K;

    cin>>n>>K;

    vector<int> a(n+1,0);

    for(int i=1; i<=n; i++)

        cin>>a[i];

    vector<vector<int>> dp(n+1,vector<int>(K+1,0));

    for(int i=0; i<=n; i++)

        dp[i][0]=1;

//    for(int i=0;i<=K;i++) dp[0][i]=1;

    for(int i=1; i<=n; i++) {

        dp[i][0]=1;

        for(int j=0; j<K; j++) {

            dp[i][j+1]=(dp[i][j+1]+dp[i][j]+dp[i-1][j+1])%mod;

            if(j>=a[i]) {

                dp[i][j+1]=(dp[i][j+1]-dp[i-1][j-a[i]]+mod)%mod;

            }



        }

    }

    cout<<dp[n][K]<<endl;

}

void N() {

    int n;

    cin>>n;

    vector<ll> a(n+1,0);

    vector<ll> sum(n+1,0);

    vector<vector<ll>> dp(n+1,vector<ll>(n+1,-1));

    for(int i=1;i<=n;i++) {

        cin>>a[i];

        sum[i]=sum[i-1]+a[i];

    }

    for(int i=1;i<=n-1;i++) {

        dp[i][i]=0;

        dp[i][i+1]=a[i]+a[i+1];

    }

    dp[n][n]=0;

    for(int len=3;len<=n;len++){

        for(int i=1;i+len-1<=n;i++){

            int j=i+len-1;

            for(int k=i;k<j;k++){

                if(dp[i][j]==-1) dp[i][j]=dp[i][k]+dp[k+1][j]+sum[j]-sum[i-1];

                else dp[i][j]=min(dp[i][j],dp[i][k]+dp[k+1][j]+sum[j]-sum[i-1]);

            }

        }

    }

    cout<<dp[1][n]<<endl;

}

int main() {

    ios::sync_with_stdio(false);

    cin.tie(0);

    cout.tie(0);

    N();

}