Submission #1079517

#	Time	Username	Problem	Language	Result	Execution time	Memory
1079517		Huseyn123	Soccer Stadium (IOI23_soccer)	C++17	70 / 100	663 ms	499072 KiB

soccer

#include "soccer.h"
#include <bits/stdc++.h>
using namespace std;
int dp[501][501][501];
int r[501][501][501];
int biggest_stadium(int N, std::vector<std::vector<int>> F)
{
    int n=N;
    int cnt,x,y; 
    cnt=x=y=0;
    for(int i=0;i<N;i++){
        for(int j=0;j<N;j++){
            if(F[i][j]){
                x=i; 
                y=j; 
                cnt++; 
            }
        }
    }
    if(cnt==1){
        return N*N-min(x+1,N-x)*min(y+1,N-y);
    }
    int res=0; 
    for(int i=0;i<N;i++){
        int l=0; 
        for(int j=0;j<N;j++){
            if(F[i][j]){
                l=j+1;
            }
            else{
                r[i][i][l]=j;
                dp[i][i][l]=j-l+1;
            }
        }
    }
    for(int i=1;i<=N;i++){
        for(int j=0;j<N;j++){
            int z=j+i-1;
            if(j){
                for(int k=0;k<N;k++){
                    if(dp[j][z][k]){
                        int l=k;
                        for(int ind=k;ind<=r[j][z][k];ind++){
                            if(F[j-1][ind]){
                                l=ind+1;
                            }
                            else{
                                dp[j-1][z][l]=max(dp[j-1][z][l],ind-l+1+dp[j][z][k]);
                                r[j-1][z][l]=ind; 
                            }
                        }
                    }
                }
            }
            if(z+1<N){
                for(int k=0;k<N;k++){
                    if(dp[j][z][k]){
                        int l=k;
                        for(int ind=k;ind<=r[j][z][k];ind++){
                            if(F[z+1][ind]){
                                l=ind+1;
                            }
                            else{
                                dp[j][z+1][l]=max(dp[j][z+1][l],ind-l+1+dp[j][z][k]);
                                r[j][z+1][l]=ind; 
                            }
                        }
                    }
                }
            }
        }
    }
    for(int i=0;i<N;i++){
        for(int j=i;j<N;j++){
            for(int z=0;z<N;z++){
                res=max(res,dp[i][j][z]); 
            }
        }
    }
    return res; 
}

Compilation message (stderr)

soccer.cpp: In function 'int biggest_stadium(int, std::vector<std::vector<int> >)':
soccer.cpp:8:9: warning: unused variable 'n' [-Wunused-variable]
    8 |     int n=N;
      |         ^

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