#include <bits/stdc++.h>
using namespace std;
const int N = 110;
int n , s[N];
int f[N][N][2];
int a[N];
int sum(int l, int r)
{
return s[r] - s[l - 1];
}
int main()
{
cin >> n;
for(int i = 1;i <= n;i ++)
{
cin >> a[i];
s[i] = s[i - 1] + a[i];
}
for(int i = 1;i <= n;i ++)
{
f[i][i][0] = a[i];
f[i][i][1] = a[i];
f[i][i + 1][0] = max(a[i] , a[i + 1]);
f[i][i + 1][1] = max(a[i] , a[i + 1]);
}
for(int i = n;i >= 1;i --)
{
for(int j = i + 1;j <= n; j ++)
{
for(int k = 0;k <= 1;k ++)
{
f[i][j][k] = max(f[i][j][k] , sum(i , j - 1)
- f[i][j - 1][1 - k] + a[j]);
f[i][j][k] = max(f[i][j][k] , sum(i + 1 , j)
- f[i + 1][j][1 - k] + a[i]);
}
}
}
cout << f[1][n][0] << ' ' << sum(1 , n) - f[1][n][0] << endl;
return 0;
}
蓝桥杯-每日刷题-030
2024-04-21 23:20:06 49 阅读