Submission #866959

#	Time	Username	Problem	Language	Result	Execution time	Memory
866959		edogawa_something	Furniture (JOI20_furniture)	C++17	5 / 100	5032 ms	7352 KiB

furniture

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<ll> vii;
typedef pair<ll,ll> pii;
#define F first 
#define S second 
#define pb push_back
#define all(v) v.begin(),v.end()
const ll M=1001;
ll n,m;
bool a[M][M];
int c[M][M];
bool chk(ll x=0,ll y=0){
    if(x==n-1&&y==m-1)
    return 1;
    if(c[x][y]>-1)
    return c[x][y];
    if(a[x][y])
    return 0;
    bool res=0;
    if(x<n-1)
    res|=chk(x+1,y);
    if(y<m-1)
    res|=chk(x,y+1);
    c[x][y]=res;
    return res;
}
int main(){
    ios_base::sync_with_stdio(0),cin.tie(0);
    cin>>n>>m;
    for(int i=0;i<n;i++){
        for(int j=0;j<m;j++)
        cin>>a[i][j];
    }
    ll q;
    cin>>q;
    while(q--){
        for(int i=0;i<n;i++){
            for(int j=0;j<m;j++)
            c[i][j]=-1;
        }
        ll x,y;
        cin>>x>>y;
        x--,y--;
        a[x][y]=1;
        if(chk())
        cout<<1<<'\n';
        else{
            cout<<0<<'\n';
            a[x][y]=0;
        }
    }
}

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