Submission #1060066

#	Time	Username	Problem	Language	Result	Execution time	Memory
1060066		epicci23	Soccer Stadium (IOI23_soccer)	C++17	3.50 / 100	196 ms	54604 KiB

soccer

#include "bits/stdc++.h"
//#define int long long
#define all(v) v.begin() , v.end()
#define sz(a) (int)a.size()
using namespace std;
#include "soccer.h"


//int dp[8][8][8][8][8][8];
vector<vector<int>> ar;
int ans=0,n;
const int INF = 1e7;

/*int calc(int a,int b,int c,int d,int e,int f){
  if(dp[a][b][c][d][e][f]!=-1) return dp[a][b][c][d][e][f];
  int cevv=0;
  for(int i=b;i<=c;i++) if(ar[a][i]) return dp[a][b][c][d][e][f]=-INF;
  for(int i=e;i<=f;i++) if(ar[d][i]) return dp[a][b][c][d][e][f]=-INF;
  if(a>0){	
   for(int i=0;i<n;i++){
  	 for(int j=i;j<n;j++){
  	   if(ar[a-1][j]) break;
  	   if(b<=i && j<=c && ((i<=e && f<=j) || (e<=i && j<=f)) ) cevv=max(cevv,calc(a-1,i,j,d,e,f)+j-i+1);  
  	 }
   }
  }
  if(d+1<n){
  	for(int i=0;i<n;i++){
  	 for(int j=i;j<n;j++){
  	   if(ar[d+1][j]) break;
  	   if(e<=i && j<=f && ((i<=b && c<=j) || (b<=i && j<=c)) ) cevv=max(cevv,calc(a,b,c,d+1,i,j)+j-i+1);  
  	 }
   }
  }
  return dp[a][b][c][d][e][f]=cevv;
}*/

int biggest_stadium(int N, vector<vector<int>> xd){
  //memset(dp,-1,sizeof(dp));
  ar=xd;n=N;
  /*if(n<=7){
   for(int i=0;i<n;i++){
  	for(int j=0;j<n;j++){
  	  for(int k=j;k<n;k++){
        if(ar[i][k]) break;
        ans=max(ans,calc(i,j,k,i,j,k)+k-j+1);
  	  }
  	}
   }
   return ans;
  }*/
  
  array<int,2> row[n],col[n];
  int ilk_row=-1,son_row=-1,ilk_col=-1,son_col=-1;
  for(int i=0;i<n;i++){
  	array<int,2> lol={-1,-1};
  	for(int j=0;j<n;j++){
  	  if(!ar[i][j]){
        if(lol[0]==-1) lol={j,j};
        else if(lol[1]==j-1) lol[1]++;
        else return -1;
  	  }
  	}
  	row[i]=lol;
    if(ilk_row==-1 && row[i][0]!=-1) ilk_row=i;
    if(row[i][0]!=-1) son_row=i;
  }

  for(int i=ilk_row+1;i<=son_row;i++){
  	bool ok=0,ok2=0;
    if(row[i][0]==-1) return -1;
    if(row[i][0]<=row[ilk_row][0] && row[ilk_row][1]<=row[i][1]) ok2=1;
    if(row[ilk_row][0]<=row[i][0] && row[i][1]<=row[ilk_row][1]) ok2=1;
  	if(row[i-1][0]<=row[i][0] && row[i][1]<=row[i-1][1]) ok=1;
  	if(row[i][0]<=row[i-1][0] && row[i-1][1]<=row[i][1]) ok=1;
  	if(!ok || !ok2) return -1;
  }

  for(int j=0;j<n;j++){
  	array<int,2> lol={-1,-1};
  	for(int i=0;i<n;i++){
  	  if(!ar[i][j]){
        if(lol[0]==-1) lol={i,i};
        else if(lol[1]==i-1) lol[1]++;
        else return -1;
  	  }
  	}
  	col[j]=lol;
    if(ilk_col==-1 && col[j][0]!=-1) ilk_col=j;
    if(col[j][0]!=-1) son_col=j;
  }

  for(int i=ilk_col+1;i<=son_col;i++){
  	bool ok=0,ok2=0;
    if(col[i][0]==-1) return -1;
    if(col[i][0]<=col[ilk_col][0] && col[ilk_col][1]<=col[i][1]) ok2=1;
    if(col[ilk_col][0]<=col[i][0] && col[i][1]<=col[ilk_col][1]) ok2=1;
  	if(col[i-1][0]<=col[i][0] && col[i][1]<=col[i-1][1]) ok=1;
  	if(col[i][0]<=col[i-1][0] && col[i-1][1]<=col[i][1]) ok=1;
  	if(!ok || !ok2) return -1;
  }
  
  int cnt=0;
  for(int i=0;i<n;i++)
  	for(int j=0;j<n;j++) cnt+=(ar[i][j]==0);

  return cnt;
}


/*void _(){
  int nn; cin >> nn;
  vector<vector<int>> v(nn,vector<int>(nn));
  for(int i=0;i<nn;i++){
  	for(int j=0;j<nn;j++){
     cin >> v[i][j];
  	}
  }

  cout << biggest_stadium(nn,v) << '\n';

}

int32_t main(){
  cin.tie(0); ios::sync_with_stdio(0);
  int tc=1;//cin >> tc;
  while(tc--) _();
  return 0;
}*/

• Subtask 0: 0 / 0
• Subtask 1: 1.5 / 6
• Subtask 2: 2 / 8
• Subtask 3: 0 / 22
• Subtask 4: 0 / 18
• Subtask 5: 0 / 16
• Subtask 6: 0 / 30