This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "fish.h"//sub5
#include <bits/stdc++.h>
using namespace std;
long long max_weights(int n, int m,vector<int> x,vector<int> y,vector<int> w)
{
long long tab[n][n+1],ans=0,dp[n][n+1][n+1];
for(int a=0;a<n;a++)
{
for(int b=0;b<n+1;b++)
{
tab[a][b]=0;
for(int c=0;c<n+1;c++)
dp[a][b][c]=0;
}
}
for(int a=0;a<m;a++)
tab[x[a]][y[a]+1]=w[a];
for(int a=0;a<n;a++)
{
for(int b=1;b<n+1;b++)
tab[a][b]+=tab[a][b-1];
}
for(int a=0;a<n+1;a++)
{
for(int b=0;b<n+1;b++)
{
if(a>b)
dp[1][a][b]=tab[1][a]-tab[1][b];
else
dp[1][a][b]=tab[0][b]-tab[0][a];
}
}
for(int c=2;c<n;c++)
{
for(int a=0;a<n+1;a++)
{
int d=0,cur=0;
for(int e=0;e<n+1;e++)
{
if(dp[c-1][e][a]>cur)
{
cur=dp[c-1][e][a];
d=e;
}
}
for(int b=0;b<n+1;b++)
{
dp[c][a][b]=max(dp[c][a][b],dp[c-1][d][a]);
if(a>b)
dp[c][a][b]=max(dp[c-1][d][a]+tab[c][a]-tab[c][b],dp[c][a][b]);
else if (b>d)
dp[c][a][b]=max(dp[c-1][d][a]+tab[c-1][b]-tab[c-1][max(d,a)],dp[c][a][b]);
}
}
}
for(int a=0;a<n+1;a++)
{
for(int b=0;b<n+1;b++)
ans=max(ans,dp[n-1][a][b]);
}
return ans;
}
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