Submission #850092

#	Time	Username	Problem	Language	Result	Execution time	Memory
850092		Mr_Ph	Furniture (JOI20_furniture)	C++14	5 / 100	1070 ms	1324 KiB

furniture

///Never gonna give you up.
#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
typedef long long ll;
typedef long long int lli;
typedef unsigned long long ull;
using namespace std;
using namespace __gnu_pbds;
template<class x>
using ordered_set = tree<x, null_type,less<x>, rb_tree_tag,tree_order_statistics_node_update>;
const ll mod=(ll)1e9+7;
const ll mod1=998244353;
///the defines :)
//#define endl '\n'
#define vi vector<int>
#define vll vector<ll>
#define ent(arr) for(int i=0;i<arr.size();i++)cin>>arr[i];
#define all(arr) arr.begin(),arr.end()
#define allr(arr) arr.rbegin(),arr.rend()
#define sz size()
#define int long long
vector<vector<int>>arr;
int n,m;
int q;
int dp[101][101];
int ans(int i,int j)
{
    if(i>n||j>m)return 0;
    if(i==n-1&&j==m-1)
        return 1;
    if(dp[i][j]!=-1)return dp[i][j];
    int e=0;
    if(i+1<n&&arr[i+1][j]!=1)e=ans(i+1,j);
    if(j+1<m&&arr[i][j+1]!=1)e=max(e,ans(i,j+1));
    return dp[i][j]=e;
}
void preprocess() {}
void solve()
{
    cin>>n>>m;
    arr.resize(n);
    for(int i=0;i<n;i++)
    {
        for(int j=0;j<m;j++)
        {
            int x;
            cin>>x;
            arr[i].push_back(x);
        }
    }
    int q;
    cin>>q;
    while(q--)
    {
        memset(dp,-1,sizeof dp);
        int i,j;
        cin>>i>>j;
        i--,j--;
        arr[i][j]=1;
        int x=ans(0,0);
        cout<<x<<endl;
        if(x==0)arr[i][j]=0;
    }
}
signed main()
{
    // freopen("div7.in","r",stdin);
    //freopen("div7.out","w",stdout);
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    preprocess();
    //bla();
    int t=1;
    //cin>>t;
    while(t--)
        solve();
}

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