Submission #1207249

#	Time	Username	Problem	Language	Result	Execution time	Memory
1207249		HappyCapybara	Soccer Stadium (IOI23_soccer)	C++17	49.50 / 100	4560 ms	794100 KiB

soccer

#include "soccer.h"
#include<bits/stdc++.h>
using namespace std;

int N;
vector<vector<int>> F;
//vector<vector<vector<vector<vector<vector<int>>>>>> dp;

unordered_map<int,int> dp;

int h(int t, int tl, int tr, int b, int bl, int br){
    return t*pow(31, 5)+tl*pow(31, 4)+tr*pow(31, 3)+b*pow(31, 2)+bl*31+br;
}

int solve(int t, int tl, int tr, int b, int bl, int br){
    if (tl == -1 || bl == -1) return -pow(10, 9);
    if (dp.find(h(t, tl, tr, b, bl, br)) != dp.end()) return dp[h(t, tl, tr, b, bl, br)];
    int res = 0;
    if (t > 0){
        int l = -1;
        for (int j=max(tl, bl); j<=min(tr, br)+1; j++){
            if (j == min(tr, br)+1 || F[t-1][j]){
                res = max(res, j-l+solve(t-1, l, j-1, b, bl, br));
                l = -1;
            }
            else if (l == -1) l = j;
        }
    }
    if (b < N-1){
        int l = -1;
        for (int j=max(tl, bl); j<=min(tr, br)+1; j++){
            if (j == min(tr, br)+1 || F[b+1][j]){
                res = max(res, j-l+solve(t, tl, tr, b+1, l, j-1));
                l = -1;
            }
            else if (l == -1) l = j;
        }
    }
    return dp[h(t, tl, tr, b, bl, br)] = res;
}

int biggest_stadium(int N, vector<vector<int>> F){
    ::N = N;
    ::F = F;
    //dp.resize(N, vector<vector<vector<vector<vector<int>>>>>(N, vector<vector<vector<vector<int>>>>(N, vector<vector<vector<int>>>(N, vector<vector<int>>(N, vector<int>(N, -1))))));
    int res = 0;
    for (int i=0; i<N; i++){
        int l = -1;
        for (int j=0; j<=N; j++){
            if (j == N || F[i][j]){
                res = max(res, j-l+solve(i, l, j-1, i, l, j-1));
                l = -1;
            }
            else if (l == -1) l = j;
        }
    }
    return res;
}

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