bzoj 1084

看到m<=2，果断乱搞。。然后搞着搞着自己被搞晕了233333

 1 #include<bits/stdc++.h>
 2 #define inc(i,l,r) for(i=l;i<=r;i++)
 3 #define dec(i,l,r) for(i=l;i>=r;i--)
 4 #define inf 1e9
 5 #define ll long long
 6 #define mem(a) memset(a,0,sizeof(a))
 7 using namespace std;
 8 int n,m,p,i,j,k,c[105][15],a[105][3],f[105][105][15],ans,v,t;
 9 int read(){
10     int x=0,f=1;char ch=getchar();
11     while(!isdigit(ch)){if(ch==‘-‘)f=-1;ch=getchar();}
12     while(isdigit(ch))x=x*10+ch-‘0‘,ch=getchar();
13     return x*f;
14 }
15 int main(){
16     n=read();m=read();p=read();
17     inc(i,1,n){
18         inc(j,1,m)
19         a[i][j]=read(),a[i][j]+=a[i-1][j];
20     }
21     if(m==1){
22         inc(i,1,n)a[i][2]=-inf;
23     }
24         inc(i,0,n)
25         inc(j,0,n)
26         inc(k,0,p){
27             inc(v,i+1,n){
28                 f[v][j][k]=max(f[v][j][k],f[i][j][k]);
29                 f[v][j][k+1]=max(f[v][j][k+1],f[i][j][k]+a[v][1]-a[i][1]);
30             }
31             inc(v,j+1,n){
32                 f[i][v][k]=max(f[i][v][k],f[i][j][k]);
33                 f[i][v][k+1]=max(f[i][v][k+1],f[i][j][k]+a[v][2]-a[j][2]);
34             }
35             t=max(i,j);
36             inc(v,t+1,n){
37                 f[v][v][k]=max(f[v][v][k],f[i][j][k]);
38                 f[v][v][k+1]=max(f[v][v][k+1],f[i][j][k]+a[v][1]+a[v][2]-a[t][1]-a[t][2]);
39             }
40         }
41         inc(i,1,n)
42         inc(j,1,n)
43         inc(k,1,p)
44         ans=max(ans,f[i][j][k]);
45         printf("%d",ans);
46         return 0;
47 }