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 <vector>
using namespace std;
long long max_weights(int N, int M, vector<int> X, vector<int> Y,vector<int> W)
{
bool subt1=1,subt2=1,subt3=1;
for (int i=0;i<M;i++)
{
if (X[i]%2)
subt1=0;
if (X[i]>1)
subt2=0;
if (Y[i]!=0)
subt3=0;
}
if (subt1)
{
long long sm=0;
for (int i=0;i<M;i++)
sm+=W[i];
return sm;
}
if (subt2)
{
long long sm[N]={};
long long val[N][2]={};
for (int i=0;i<M;i++)
val[Y[i]][X[i]]=W[i];
sm[0]=val[0][1];
for (int i=1;i<N;i++)
sm[i]=sm[i-1]+val[i][1];
long long ans=sm[N-1];
long long x=0;
for (int i=0;i<N;i++)
{
x+=val[i][0];
if (N>2)
ans=max(ans,x+sm[N-1]-sm[i]);
}
ans=max(ans,x);
return ans;
}
if (subt3)
{
long long dp[N][2]={};
int val[N]={};
for (int i=0;i<M;i++)
val[X[i]]=W[i];
dp[0][0]=0,dp[0][1]=val[0];
long long ans=0;
long long mx=0;
for (int i=1;i<N;i++)
{
if (i>1)
dp[i][0]=mx+val[i];
if (i<N-1)
dp[i][1]=max(dp[i][0],dp[i-1][0]+val[i]);
mx=max(mx,max(dp[i-1][0],dp[i-1][1]));
ans=max(ans,max(dp[i][0],dp[i][1]));
}
return ans;
}
return 0;
}
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