#include "soccer.h"
#include<bits/stdc++.h>
using namespace std;
const int N=550;
int n,psum[N][N],l[N][N],r[N][N],currl[N][N],currr[N][N],dp[N][N],ans;
vector<vector<int>> f;
int get(int _x1,int _y1,int _x2,int _y2){
if (_x1>_x2) swap(_x1,_x2);
if (_y1>_y2) swap(_y1,_y2);
return psum[_x2][_y2]-psum[_x1-1][_y2]-psum[_x2][_y1-1]+psum[_x1-1][_y1+1];
}
int biggest_stadium(int N, vector<vector<int>> F) {
n=N;
f=F;
for (int i=1;i<=n;i++) for (int j=1;j<=n;j++){
psum[i][j]=psum[i-1][j]+psum[i][j-1]+F[i-1][j-1]-psum[i-1][j-1];
}
//l: first block r: last space
for (int i=1;i<=n;i++){
l[i][0]=0;
for (int j=1;j<=n;j++) l[i][j]=(F[i-1][j-1]?j:l[i][j-1]);
r[i][n+1]=n;
for (int j=n;j>=1;j--) r[i][j](F[i-1][j-1]?j-1:r[i][j+1]);
}
for (int y=1;y<=n;y++){
for (int i=1;i<=n;i++) currl[i][i]=l[i][y],currr[i][i]=r[i][y];
for (int i=n;i>=1;i--) for (int j=i+1;j<=n;j++){
currl[i][j]=max(currl[i+1][j],currl[i][j-1]);
currr[i][j]=min(currr[i+1][j],currr[i][j-1]);
}
for (int i=1;i<=n;i++) for (int j=1;j<=n;j++) dp[i][j]=0;
for (int i=1;i<=n;i++) dp[i][i]=currr[i][i]-currl[i][i];
for (int i=n;i>=1;i--) for (int j=i+1;j<=n;j++){
dp[i][j]=max(dp[i+1][j],dp[i][j-1]);
dp[i][j]=max(dp[i][j],dp[i+1][j]+currr[i][j]-currl[i][j]);
dp[i][j]=max(dp[i][j],dp[i][j-1]+currr[i][j]-currl[i][j]);
}
ans=max(ans,dp[1][n]);
}
return ans;
}
Compilation message
soccer.cpp: In function 'int biggest_stadium(int, std::vector<std::vector<int> >)':
soccer.cpp:24:65: error: expression cannot be used as a function
24 | for (int j=n;j>=1;j--) r[i][j](F[i-1][j-1]?j-1:r[i][j+1]);
| ^
