Submission #569782

#	Time	Username	Problem	Language	Result	Execution time	Memory
569782		mat_v	Furniture (JOI20_furniture)	C++14	100 / 100	335 ms	17820 KiB

furniture

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>

#define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
#define fb(i,a,b) for(int (i) = (a); (i) >= (b); --(i))
#define mod 998244353
#define xx first
#define yy second
#define all(a) (a).begin(), (a).end()
#define pb push_back
#define ll long long
#define pii pair<int,int>


using namespace std;
using namespace __gnu_pbds;
typedef tree<int, null_type, less<int>,rb_tree_tag, tree_order_statistics_node_update> ordered_set;/// find_by_order(x)(x+1th) , order_of_key() (strictly less)
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());


int n,m;
int mat[1005][1005];
int kol[2005];
bool dobar[1005][1005][2];

void radi(int x, int y, int idx){
    if(x <= 0 && y <= 0 && x > n || y > m)return;
    if(!dobar[x][y][idx])return;
    if(idx == 0){
        bool sta = 0;
        if(!mat[x+1][y])sta |= dobar[x+1][y][0];
        if(!mat[x][y+1])sta |= dobar[x][y+1][0];
        if(!sta){
            if(dobar[x][y][idx^1])kol[x+y]--;
            dobar[x][y][idx] = 0;
            radi(x-1,y,0);
            radi(x,y-1,0);
        }
    }
    else{
        bool sta = 0;
        if(!mat[x-1][y])sta |= dobar[x-1][y][1];
        if(!mat[x][y-1])sta |= dobar[x][y-1][1];
        if(!sta){
            if(dobar[x][y][idx^1])kol[x+y]--;
            dobar[x][y][idx] = 0;
            radi(x+1,y,1);
            radi(x,y+1,1);
        }
    }
}

int main()
{

    ios_base::sync_with_stdio(false); cin.tie(0);

    cin >> n >> m;
    ff(i,1,n){
        ff(j,1,m)cin >> mat[i][j];
    }
    dobar[n][m][0] = 1;
    dobar[1][1][1] = 1;
    fb(i,n,1){
        fb(j,m,1){

            if(i == n && j == m || mat[i][j] == 1)continue;
            if(!mat[i+1][j])dobar[i][j][0] |= dobar[i+1][j][0];
            if(!mat[i][j+1])dobar[i][j][0] |= dobar[i][j+1][0];
        }
    }
    ff(i,1,n){
        ff(j,1,m){
            if(i == 1 && j == 1 || mat[i][j] == 1)continue;
            if(!mat[i-1][j])dobar[i][j][1] |= dobar[i-1][j][1];
            if(!mat[i][j-1])dobar[i][j][1] |= dobar[i][j-1][1];
        }
    }
    ff(i,1,n){
        ff(j,1,m){
            if(dobar[i][j][0] && dobar[i][j][1])kol[i+j]++;
        }
    }
    //cout << kol[4] << "\n";
   // cout << dobar[2][2][0] << " " << dobar[2][2][1] << "\n";
    int q;
    cin >> q;
    while(q--){
        int x,y;
        cin >> x >> y;
        bool mogu = 0;
        if(!dobar[x][y][0] || !dobar[x][y][1])mogu = 1;
        if(kol[x+y] > 1)mogu = 1;
        cout << mogu << "\n";
        if(mogu){
            if(dobar[x][y][0] && dobar[x][y][1])kol[x+y]--;
            dobar[x][y][0] = dobar[x][y][1] = 0;
            radi(x-1,y,0);
            radi(x,y-1,0);
            radi(x,y+1,1);
            radi(x+1,y,1);
        }
    }


    return 0;
}

Compilation message (stderr)

furniture.cpp: In function 'void radi(int, int, int)':
furniture.cpp:29:25: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   29 |     if(x <= 0 && y <= 0 && x > n || y > m)return;
      |        ~~~~~~~~~~~~~~~~~^~~~~~~~
furniture.cpp: In function 'int main()':
furniture.cpp:6:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
furniture.cpp:61:5: note: in expansion of macro 'ff'
   61 |     ff(i,1,n){
      |     ^~
furniture.cpp:6:27: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
furniture.cpp:62:9: note: in expansion of macro 'ff'
   62 |         ff(j,1,m)cin >> mat[i][j];
      |         ^~
furniture.cpp:7:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    7 | #define fb(i,a,b) for(int (i) = (a); (i) >= (b); --(i))
      |                           ^
furniture.cpp:66:5: note: in expansion of macro 'fb'
   66 |     fb(i,n,1){
      |     ^~
furniture.cpp:7:27: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
    7 | #define fb(i,a,b) for(int (i) = (a); (i) >= (b); --(i))
      |                           ^
furniture.cpp:67:9: note: in expansion of macro 'fb'
   67 |         fb(j,m,1){
      |         ^~
furniture.cpp:69:23: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   69 |             if(i == n && j == m || mat[i][j] == 1)continue;
      |                ~~~~~~~^~~~~~~~~
furniture.cpp:6:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
furniture.cpp:74:5: note: in expansion of macro 'ff'
   74 |     ff(i,1,n){
      |     ^~
furniture.cpp:6:27: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
furniture.cpp:75:9: note: in expansion of macro 'ff'
   75 |         ff(j,1,m){
      |         ^~
furniture.cpp:76:23: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   76 |             if(i == 1 && j == 1 || mat[i][j] == 1)continue;
      |                ~~~~~~~^~~~~~~~~
furniture.cpp:6:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
furniture.cpp:81:5: note: in expansion of macro 'ff'
   81 |     ff(i,1,n){
      |     ^~
furniture.cpp:6:27: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
furniture.cpp:82:9: note: in expansion of macro 'ff'
   82 |         ff(j,1,m){
      |         ^~

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