Submission #538575

#	Time	Username	Problem	Language	Result	Execution time	Memory
538575		rrrr10000	Furniture (JOI20_furniture)	C++14	Compilation error	0 ms	0 KiB

furniture

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll,ll> P;
typedef tuple<ll,ll,ll> PP;
typedef vector<ll> vi;
typedef vector<vi> vvi;
typedef vector<P> vp;
typedef vector<bool> vb;
typedef vector<vb> vvb;
#define rep(i,n) for(ll i=0;i<(ll)(n);i++)
#define REP(i,k,n) for(ll i=(ll)(k);i<(ll)(n);i++)
#define all(a) a.begin(),a.end()
#define fi first
#define se second
#define pb emplace_back
#define lb(v,k) (lower_bound(all(v),k)-v.begin())
template<class T> void out(T a){cout<<a<<'\n';}
template<class T> void outv(T v){rep(i,v.size()){if(i)cout<<' ';cout<<v[i];}cout<<'\n';}
template<class T> void outvv(T v){rep(i,v.size())outv(v[i]);}
const ll mod=1000000007;
ll modpow(ll a,ll b){
    ll res=1;
    while(b){
        if(b&1)res=res*a%mod;
        b>>=1;
        a=a*a%mod;
    }
    return res;
}
int main(){
    cin.tie(0);ios::sync_with_stdio(false);
    ll n,m;cin>>n>>m;
    vvi v(n,vi(m));
    rep(i,n)rep(j,m)cin>>v[i][j];
    vvb s(n,vb(m,true)),t(n,vb(m,true));
    queue<P> que;
    vi dx={1,0,0,-1},dy={0,1,-1,0};
    vi cnt(n+m-1,inf);
    auto sols=[&](){
        while(!que.empty()){
            auto x=que.front();que.pop();
            rep(k,2){
                P nx(x.fi+dx[k],x.se+dy[k]);
                if(nx.fi<n&&nx.se<m&&s[nx.fi][nx.se]){
                    P nnx(nx.fi-dx[1-k],nx.se-dy[1-k]);
                    if(nnx.fi>=0&&nnx.se>=0&&s[nnx.fi][nnx.se])continue;
                    if(t[nx.fi][nx.se])cnt[nx.fi+nx.se]--;
                    assert(cnt[nx.fi+nx.se]>0);
                    s[nx.fi][nx.se]=false;que.emplace(nx);
                }
            }
        }
    };
    auto solt=[&](){
        while(!que.empty()){
            auto x=que.front();que.pop();
            REP(k,2,4){
                P nx(x.fi+dx[k],x.se+dy[k]);
                if(nx.fi>=0&&nx.se>=0&&t[nx.fi][nx.se]){
                    P nnx(nx.fi-dx[5-k],nx.se-dy[5-k]);
                    if(nnx.fi<n&&nnx.se<m&&t[nnx.fi][nnx.se])continue;
                    if(s[nx.fi][nx.se])cnt[nx.fi+nx.se]--;
                    assert(cnt[nx.fi+nx.se]>0);
                    t[nx.fi][nx.se]=false;que.emplace(nx);
                }
            }
        }
    };
    rep(i,n)rep(j,m)if(v[i][j]){
        s[i][j]=false;que.emplace(i,j);
    }sols();
    rep(i,n)rep(j,m)if(v[i][j]){
        t[i][j]=false;que.emplace(i,j);
    }solt();
    rep(i,n+m-1)cnt[i]=0;
    rep(i,n)rep(j,m)if(s[i][j]&&t[i][j])cnt[i+j]++;
    // outvv(s);
    // outvv(t);
    // outv(cnt);
    ll q;cin>>q;
    rep(qq,q){
        ll x,y;cin>>x>>y;x--;y--;
        if(s[x][y]&&t[x][y]&&cnt[x+y]==1)out(0);
        else{
            out(1);
            if(s[x][y]&&t[x][y])cnt[x+y]--;
            s[x][y]=false;sols();
            t[x][y]=false;solt();
        }
    }
}

Compilation message (stderr)

furniture.cpp: In function 'int main()':
furniture.cpp:39:18: error: 'inf' was not declared in this scope; did you mean 'ynf'?
   39 |     vi cnt(n+m-1,inf);
      |                  ^~~
      |                  ynf