OJ-Problems-Source/HDOJ/2921_autoAC.cpp

55 lines
1.5 KiB
C++
Raw Normal View History

#include<iostream>
#include<algorithm>
#include<cstdio>
#include<cstring>
#include<string>
#include<map>
#include<cmath>
using namespace std;
int f[410][820], val[410][810];
int main()
{
int n, kase = 0;
while (cin >> n)
{
if (n == 0) break;
for (int i = 1; i <= n; i++)
{
f[i][0] = 0;
for (int j = 1; j <= 2 * i - 1; j++)
{
scanf("%d", &val[i][j]);
f[i][j] = f[i][j - 1] + val[i][j];
}
}
int ans = -0x3f3f3f3f;
for (int i = 1; i <= n; i++)
for (int j = 1; j <= 2 * i - 1; j += 2)
{
int tmp = 0;
for (int k = i; k <= n; k++)
{
if (j + 2 * (k - i) > 2 * k - 1) break;
tmp += f[k][j + 2 * (k - i)] - f[k][j - 1];
if (tmp > ans) ans = tmp;
}
}
for (int i = n; i >= 1; i--)
{
for (int j = 2; j <= 2 * i - 1; j += 2)
{
int tmp = 0;
for (int k = i; k >= 1; k--)
{
if (j - 2 * (i - k) < 1) break;
if (j > 2 * k - 1) break;
tmp += f[k][j] - f[k][j - 2 * (i - k) - 1];
if (tmp > ans) ans = tmp;
}
}
}
kase++;
cout << kase << ". " << ans << endl;
}
}