Submission #1227881

#	Time	Username	Problem	Language	Result	Execution time	Memory
1227881		Muhammad_Aneeq	Homecoming (BOI18_homecoming)	C++20	Compilation error	0 ms	0 KiB

homecoming

long long solve(int N, int K, int *A, int *B)
{
  int n=N;
  long long dp[N+10][N+10]={};
  long long pre[2*N+10]={};
  for (int i=0;i<2*N;i++)
    pre[i+1]=pre[i]+B[i%N];
  for (int i=0;i<N;i++)
    for (int j=0;j<N;j++)
      dp[i][j]=-1e15;
  long long ans=0;
  for (int i=0;i<N;i++)
  {
    dp[i][i]=A[i]-(pre[i+K]-pre[i]);
    ans=max(ans,dp[i][i]);
  }
  for (int i=0;i<n;i++)
  {
    for (int j=i;j<n;j++)
    {
      for (int k=j+1;k<n;k++)
      {
        int l=k,r=k+K;
        l=max(l,j+K);
        r=min(r,i+n);
        long long sm=0;
        if (r>=l)
          sm=pre[r]-pre[l];
        dp[i][k]=max(dp[i][k],dp[i][j]-sm+A[k]);
        ans=max(ans,dp[i][k]);
      }
    }
  }
  return ans;
}

Compilation message (stderr)

homecoming.cpp: In function 'long long int solve(int, int, int*, int*)':
homecoming.cpp:15:9: error: 'max' was not declared in this scope
   15 |     ans=max(ans,dp[i][i]);
      |         ^~~
homecoming.cpp:24:11: error: 'max' was not declared in this scope
   24 |         l=max(l,j+K);
      |           ^~~
homecoming.cpp:25:11: error: 'min' was not declared in this scope
   25 |         r=min(r,i+n);
      |           ^~~