Submission #840867

#	Time	Username	Problem	Language	Result	Execution time	Memory
840867		YassirSalama	Soccer Stadium (IOI23_soccer)	C++17	0 / 100	1 ms	336 KiB

soccer

#include "soccer.h"
#include<bits/stdc++.h>
using namespace std;
#define OVL(x,s) for(auto y:x) cout<<y<<s; cout<<"\n";
void dbg_out() { cout << endl; }
template<typename Head, typename... Tail> void dbg_out(Head H, Tail... T) { cout << ' ' << H; dbg_out(T...); }
#define dbg(...) cout << "(" << #__VA_ARGS__ << "):", dbg_out(__VA_ARGS__);
#define endl "\n"
#define pb push_back
#define F first
#define S second
#define ll long long
#define mod 1000000007
#define all(v) v.begin(),v.end()
int comp=0;
map<pair<int,int>,int> mp;
int dx[4]={1,-1,0,0};
int dy[4]={0,0,1,-1};
vector<vector<int>> v;
vector<vector<bool>> visited;
bool check(int i,int j){
    int n=v.size();
    return i>=0&&j>=0&&i<n&&j<n&&!visited[i][j];
}
map<int,int> sz;
void dfs(int i,int j){
    mp[{i,j}]=comp;
    sz[comp]++;
    visited[i][j]=true;
    for(int x=0;x<4;x++){
        int ni=dx[x]+i;
        int nj=dy[x]+j;
        if(check(ni,nj)) dfs(ni,nj);
    }
}
int biggest_stadium(int n, vector<vector<int>> d)
{
    int ii=-1;
    v=d;
    int jj=-1;
    for(int i=0;i<n;i++){
        for(int j=0;j<n;j++){
            if(v[i][j]){
                ii=i;
                jj=j;
                break;
            }
        }
    }
    if(ii==-1)
        return n*n;
    // dbg(ii,jj);
    int ans=0;
    vector<vector<bool>> visted(n,vector<bool>(n,0));
    visited=visted;
    for(int i=0;i<n;i++){
        for(int j=0;j<n;j++){
            if(i==ii) visited[i][j]=true;
            if(j==jj) visited[i][j]=true;
        }
    }
    for(int i=0;i<n;i++){
        for(int j=0;j<n;j++){
            // cout<<visited[i][j]<<" ";
        }
        // cout<<endl;
    }
    for(int i=0;i<n;i++){
        for(int j=0;j<n;j++){
            if(!visited[i][j]) {
                dfs(i,j);
                comp++;
            }
        }
    }
    ans=max({sz[0],sz[1],sz[2],sz[3],
             sz[0]+sz[1],sz[0]+sz[2],sz[1]+sz[3],sz[2]+sz[3]});
    return ans;
}

#ifdef IOI

int main()
{
    int N;
    assert(1 == scanf("%d", &N));
    vector<vector<int>> F(N, vector<int>(N));
    for (int i = 0; i < N; i++)
    {
        for (int j = 0; j < N; j++)
        {
            assert(1 == scanf("%d", &F[i][j]));
        }
    }
    fclose(stdin);

    int res = biggest_stadium(N, F);

    printf("%d\n", res);
    fclose(stdout);
    return 0;
}

#endif

• 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