oj.uz

Submission #506365

# Submission time Handle Problem Language Result Execution time Memory
506365 2022-01-12T02:47:14 Z fcmalkcin Furniture (JOI20_furniture) C++17
100 / 100
 533 ms 60000 KB 
/*#pragma GCC optimize("Ofast")
#pragma GCC optimization("unroll-loops, no-stack-protector")
#pragma GCC target("avx,avx2,fma")*/

#include <bits/stdc++.h>
using namespace std;

#define ll  long long
#define pll pair<ll,ll>
#define ff first
#define ss second
#define pb push_back
#define endl "\n"
#define For(i,a,b) for (ll i=a;i<=b;i++)

mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());

const ll maxn=1e3+200;
const ll mod=1e9+7  ;
const ll base=3e18;

/// you will be the best but now you just are trash
/// goal 3/7

ll cnt[maxn][maxn];
ll cnt1[maxn][maxn];
bool dd[maxn][maxn];
ll ax[5]= {0,1,0,-1};
ll ay[5]= {1,0,-1,0};
ll fwt[maxn][maxn][2];
ll a[maxn][maxn];
ll n, m;

void update(ll x,ll y,ll t,ll diff)
{
    ll len=(t==0?m:n);
    for (int i=y; i<=len; i+= i&(-i))
    {
        fwt[x][i][t]+=diff;
    }
}
ll get(ll x,ll l,ll r,ll t)
{
    ll ans=0;
    for (int i=r;i;i-= i&(-i))
    {
        ans+=fwt[x][i][t];
    }
     for (int i=l-1;i;i-= i&(-i))
    {
        ans-=fwt[x][i][t];
    }
    return ans;
}
void add(ll x,ll y)
{
    if (dd[x][y]) return ;
    queue<pll> q;
    q.push(make_pair(x,y));
    dd[x][y]=1;
    while (!q.empty())
    {
        auto p=q.front();
        q.pop();
        ll x=p.ff;
        ll y=p.ss;
        update(x,y,0,-1);
        update(y,x,1,-1);
        bool chk=(make_pair(x,y)==make_pair(1ll,3ll));
        for (int t=0; t<4; t++)
        {
            ll x1=x+ax[t];
            ll y1=y+ay[t];
            if (x1>=1&&x1<=n&&y1>=1&&y1<=m&&!dd[x1][y1])
            {
                if (t<=1)
                {
                    cnt[x1][y1]--;
                    if (!cnt[x1][y1])
                    {
                        dd[x1][y1]=true;
                        q.push(make_pair(x1,y1));
                    }
                }
                else
                {
                    cnt1[x1][y1]--;
                    if (!cnt1[x1][y1])
                    {
                        dd[x1][y1]=true;
                        q.push(make_pair(x1,y1));
                    }
                }
            }
        }
    }
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    if (fopen("t.inp", "r"))
    {
        freopen("test.inp", "r", stdin);
        freopen("test.out", "w", stdout);
    }
    cin>> n>> m;
    for (int i=1; i<=n; i++)
    {
        for (int j=1; j<=m; j++)
        {
            cin>>a[i][j];
            for (int t=0; t<4; t++)
            {
                ll x1=i+ax[t];
                ll y1=j+ay[t];
                if (x1>=1&&x1<=n&&y1>=1&&y1<=m)
                {
                    if (t<=1)
                    {
                        cnt1[i][j]++;
                    }
                    else
                    {
                        cnt[i][j]++;
                    }
                }
            }
            update(i,j,0,1);
            update(j,i,1,1);
        }
    }

     for (int i=1; i<=n; i++)
    {
        for (int j=1; j<=m; j++)
        {
            if (a[i][j]==1)
            {
                add(i,j);
            }
        }
    }
   /*  for (int i=1; i<=n; i++)
    {
        for (int j=1; j<=m; j++)
        {
            cout <<dd[i][j]<<" ";
        }
        cout <<endl;
    }*/
    ll q;
    cin>> q;
    while (q--)
    {
        ll x, y;
        cin>>x>> y;
        bool chk=false;
        if (x+1<=n&&y>=2&&get(x+1,1,y-1,0))
        {
            chk=true;
        }
         if (y+1<=m&&x>=2&&get(y+1,1,x-1,1))
        {
            chk=true;
        }
        if (chk)
        {
            add(x,y);
        }
        cout <<chk<<endl;
    }
}

Compilation message

furniture.cpp: In function 'void add(long long int, long long int)':
furniture.cpp:69:14: warning: unused variable 'chk' [-Wunused-variable]
   69 |         bool chk=(make_pair(x,y)==make_pair(1ll,3ll));
      |              ^~~
furniture.cpp: In function 'int main()':
furniture.cpp:105:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  105 |         freopen("test.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
furniture.cpp:106:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  106 |         freopen("test.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1872 KB Output is correct
2 Correct 2 ms 2260 KB Output is correct
3 Correct 3 ms 2252 KB Output is correct
4 Correct 4 ms 2384 KB Output is correct
5 Correct 5 ms 2512 KB Output is correct
6 Correct 7 ms 2576 KB Output is correct
7 Correct 4 ms 2508 KB Output is correct
8 Correct 5 ms 2512 KB Output is correct
9 Correct 6 ms 2508 KB Output is correct

Subtask #2
95.0 / 95.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1872 KB Output is correct
2 Correct 2 ms 2260 KB Output is correct
3 Correct 3 ms 2252 KB Output is correct
4 Correct 4 ms 2384 KB Output is correct
5 Correct 5 ms 2512 KB Output is correct
6 Correct 7 ms 2576 KB Output is correct
7 Correct 4 ms 2508 KB Output is correct
8 Correct 5 ms 2512 KB Output is correct
9 Correct 6 ms 2508 KB Output is correct
10 Correct 23 ms 7740 KB Output is correct
11 Correct 5 ms 2388 KB Output is correct
12 Correct 326 ms 52688 KB Output is correct
13 Correct 150 ms 48076 KB Output is correct
14 Correct 533 ms 55132 KB Output is correct
15 Correct 510 ms 54544 KB Output is correct
16 Correct 464 ms 56956 KB Output is correct
17 Correct 497 ms 59484 KB Output is correct
18 Correct 476 ms 57908 KB Output is correct
19 Correct 508 ms 59980 KB Output is correct
20 Correct 508 ms 59968 KB Output is correct
21 Correct 482 ms 60000 KB Output is correct