Submission #1008322

#	Time	Username	Problem	Language	Result	Execution time	Memory
1008322		Amr	Soccer Stadium (IOI23_soccer)	C++17	0 / 100	1 ms	1628 KiB

soccer

#include "soccer.h"
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
using namespace std;
#define F first
#define S second
#define sz size()
#define all(x) (x).begin(), (x).end()
const int N = 32;
ll n;
vector<vector<int> > a;
ll dp[N][N][N][2];
ll pre[N][N];
int biggest_stadium(int N, std::vector<std::vector<int>> F)
{
    n = N, a = F;
    for(int i = 1; i <= n; i++) for(int j = 1; j <= n; j++) pre[i][j] = pre[i][j-1]+a[i-1][j-1];
    //for(int i = 1; i <= n; i++) {for(int j = 1; j <= n;j++) cout << pre[i][j] << " "; cout << endl;}
    // base case
    for(int r = 1; r <= n; r++)
    for(int i = 1; i <= n; i++) for(int j = i; j <= n ;j++)
    {
        ll cnt = pre[r][j]-pre[r][i-1];
        if(cnt>0) continue;
        dp[r][i][j][0] = j-i+1;
       // cout << dp[1][i][j][0] << " ";
    }
    for(int r = 2; r<= n; r++)
    for(int i2 = 1; i2 <= n; i2++)
    {
        for(int j2 = i2; j2 <= n; j2++)
        {
            ll cnt = pre[r-1][j2]-pre[r-1][i2-1];
            if(cnt>0) continue;
            for(int i = 1; i <= n; i++)
            {
                for(int j =i ; j <= n; j++)
                {
                    cnt = pre[r][j]-pre[r][i-1];
                    if(cnt>0) continue;
                  // if(i==2&&j==5&&r==2&&i2==1&&j2==5) cout << dp[r-1][i2][j2][0] << endl;
                    if(i2>=i&&j2<=j) // prev is sub from me
                        {dp[r][i][j][0] = max(dp[r][i][j][0],dp[r-1][i2][j2][0]+j-i+1);
                         dp[r][i][j][1] = max(dp[r][i][j][1],dp[r-1][i2][j2][0]+j-i+1);
                        }
                    else if(i2<=i&&j2>=j)
                        dp[r][i][j][1] = max({dp[r][i][j][1],dp[r-1][i2][j2][0]+j-i+1,dp[r-1][i2][j2][1]+j-i+1});
                }
            }
        }
    }
   // cout << dp[2][3][4][1] << endl;
    ll best = 0;
    for(int r = 1; r <= n; r++)
    for(int i = 1; i <= n; i++)
    {
        for(int j = i; j <= n; j++)
           //if(dp[r][i][j][1]==21) cout<<r << i << " " << j << endl;
           best = max({best,dp[r][i][j][0],dp[r][i][j][1]});
    }
    return best;
}
/*
5
0 0 0 0 0
1 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 1 0 0

*/

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