Submission #1143044

#	Time	Username	Problem	Language	Result	Execution time	Memory
1143044		Noproblem29	Furniture (JOI20_furniture)	C++20	100 / 100	239 ms	10384 KiB

furniture

#include<bits/stdc++.h>
using namespace std;
#ifndef BADGNU
#pragma GCC target("sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
#endif
#pragma GCC optimize("Ofast,unroll-loops,fast-math,O3")
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp> 
using namespace __gnu_pbds;
#define ll long long
#define int ll
#define ld long double
#define y1 cheza
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
template<class T> using ordered_set = tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;
template<class T> using ordered_multiset = tree<T,null_type,less_equal<T>,rb_tree_tag,tree_order_statistics_node_update>;
const int N=1010;
const int M=5001;
const int B=447;
const int mod=998244353;
const ll INF=1e18;
const int dx[]={1,-1,0,0};
const int dy[]={0,0,1,-1};
const double eps=1e-6;
int n,m,q;
int mid[N+N];
int dp[N][N];
int tin=0;
stack<pair<int,int>>s;
void add(int x,int y){
    if(dp[x][y]==0){
        dp[x][y]=1;
        --mid[x+y];
        s.push({x,y});
    }
}
bool check(int x,int y){
    if(dp[x][y])return 1;
    if(mid[x+y]==1)return 0;
    add(x,y);
    while(s.size()){
        auto [a,b]=s.top();
        s.pop();
        if(dp[a-1][b+1]){
            add(a-1,b);
            add(a,b+1);
        }
        if(dp[a+1][b-1]){
            add(a+1,b);
            add(a,b-1);
        }
    }

    return 1;
}
void test(){
    cin>>n>>m;
    memset(dp,1,sizeof(dp));
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            mid[i+j]++;
            dp[i][j]=0;
        }
    }

    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            // cin>>a[i][j];
            char x;
            cin>>x;
            if(x=='1'){
                check(i,j);
            }
        }
    }
    cin>>q;
    for(int x,y;q--;){
        cin>>x>>y;
        cout<<check(x,y)<<'\n';

    }
}



/*

*/
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    // cout.tie(nullptr);
    int t2=1;
    // cin>>t2;
    for(int i=1;i<=t2;i++){
        test();
    }
}

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