Submission #849825

#	Time	Username	Problem	Language	Result	Execution time	Memory
849825		Abito	Furniture (JOI20_furniture)	C++17	0 / 100	2 ms	9052 KiB

furniture

#include <bits/stdc++.h>
#define F first
#define S second
#define pb push_back
#define ppb pop_back
#define ep insert
#define endl '\n'
#define elif else if
#define pow pwr
#define sqrt sqrtt
//#define int long long
#define y1 YONE
typedef unsigned long long ull;
using namespace std;
const int N=3005;
int n,m,q,a[N][N],d[N][N],c,vis[N][N],f[N];
bool b[N][N],dp[N][N];
bool rec(int x,int y,int dd){
    if (x>n || y>m || b[x][y]) return 0;
    if (x==n && y==m){
        d[x][y]=dd;
        return 1;
    }
    if (vis[x][y]) return dp[x][y];
    vis[x][y]=-1;
    dp[x][y]=rec(x+1,y,dd+1)|rec(x,y+1,dd+1);
    d[x][y]=dd*dp[x][y];
    f[d[x][y]]++;
    return dp[x][y];
}
void dfs1(int x,int y){
    f[d[x][y]]--;
    d[x][y]=0;
    if (x<n && !d[x+1][y-1] && d[x+1][y]) dfs1(x+1,y);
    if (y<m && !d[x-1][y+1] && d[x][y+1]) dfs1(x,y+1);
    return;
}
void dfs2(int x,int y){
    vis[x][y]=c;
    if (!d[x+1][y] && !d[x][y+1]) f[d[x][y]]--,d[x][y]=0;
    if (d[x][y]) return;
    if (x>1 && vis[x-1][y]!=c) dfs2(x-1,y);
    if (y>1 && vis[x][y-1]!=c) dfs2(x,y-1);
}
int32_t main(){
    ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
    cin>>n>>m;
    for (int i=1;i<=n;i++) for (int j=1;j<=m;j++) cin>>b[i][j];
    rec(1,1,0);
    /*for (int i=1;i<=n;i++){
        for (int j=1;j<=m;j++) cout<<d[i][j]<<' ';
        cout<<endl;
    }*/
    cin>>q;
    while (q--){
        c++;
        int x,y;cin>>x>>y;
        if (!d[x][y]){
            b[x][y]=true;
            cout<<1<<endl;
            continue;
        }
        if (f[d[x][y]]>1){
            for (int i=1;i<=10;i++){
            dfs2(x,y);
            dfs1(x,y);}
            b[x][y]=true;
            cout<<1<<endl;
            continue;
        }cout<<0<<endl;
    }
    return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 95