Submission #553240

#	Time	Username	Problem	Language	Result	Execution time	Memory
553240		cheetose	Furniture (JOI20_furniture)	C++17	100 / 100	392 ms	8600 KiB

furniture

#include <bits/stdc++.h>
#define mp make_pair
#define pb push_back
#define X first
#define Y second
#define y0 y12
#define y1 y22
#define INF 987654321987654321
#define PI 3.141592653589793238462643383279502884
#define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
#define fdn(i,a,b,c) for(int (i)=(a);(i)>=(b);(i)-=(c))
#define MEM0(a) memset((a),0,sizeof(a))
#define MEM_1(a) memset((a),-1,sizeof(a))
#define ALL(a) a.begin(),a.end()
#define COMPRESS(a) sort(ALL(a));a.resize(unique(ALL(a))-a.begin())
#define SYNC ios_base::sync_with_stdio(false);cin.tie(0)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef double db;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef pair<int, int> Pi;
typedef pair<ll, ll> Pll;
typedef pair<ld, ld> Pd;
typedef vector<int> Vi;
typedef vector<ll> Vll;
typedef vector<ld> Vd;
typedef vector<Pi> VPi;
typedef vector<Pll> VPll;
typedef vector<Pd> VPd;
typedef tuple<int, int, int> iii;
typedef tuple<int, int, int, int> iiii;
typedef tuple<ll, ll, ll> LLL;
typedef vector<iii> Viii;
typedef vector<LLL> VLLL;
typedef complex<double> base;
const int MOD = 1000000007;
ll POW(ll a, ll b, ll MMM = MOD) { ll ret = 1; for (; b; b >>= 1, a = (a*a) % MMM)if (b & 1)ret = (ret*a) % MMM; return ret; }
int dx[] = { 0,1,0,-1,1,1,-1,-1 }, dy[] = { 1,0,-1,0,1,-1,1,-1 };
int ddx[] = { -1,-2,1,-2,2,-1,2,1 }, ddy[] = { -2,-1,-2,1,-1,2,1,2 };

int a[1005][1005];
int cnt[2010];
int main(){
	int n,m;
	scanf("%d%d",&n,&m);
	fup(i,1,n,1)fup(j,1,m,1)scanf("%d",a[i]+j);
	fup(i,1,m,1)a[0][i]=a[n+1][i]=1;
	fup(i,1,n,1)a[i][0]=a[i][m+1]=1;
	fup(i,1,n,1){
		fup(j,1,m,1){
			if(i+j==n+m || i+j==2)continue;
			if(a[i-1][j] && a[i][j-1])a[i][j]=1;
		}
	}
	fdn(i,n,1,1){
		fdn(j,m,1,1){
			if(i+j==n+m || i+j==2)continue;
			if(a[i+1][j] && a[i][j+1])a[i][j]=1;
		}
	}
	fup(i,1,n,1){
		fup(j,1,m,1){
			if(!a[i][j])cnt[i+j]++;
		}
	}
	int q;
	scanf("%d",&q);
	while(q--){
		int x,y;
		scanf("%d%d",&x,&y);
		if(a[x][y]){
			puts("1");
		}else if(cnt[x+y]==1)puts("0");
		else{
			puts("1");
			a[x][y]=1;
			cnt[x+y]--;
			queue<Pi> q;
			q.push(mp(x,y));
			while(!q.empty()){
				auto [xx,yy]=q.front();
				q.pop();
				fup(k,0,1,1){
					int nx=xx+dx[k],ny=yy+dy[k];
					if(nx>=1 && nx<=n && ny>=1 && ny<=m && !a[nx][ny] && a[nx-1][ny] && a[nx][ny-1]){
						q.push(mp(nx,ny));
						a[nx][ny]=1;
						cnt[nx+ny]--;
					}
				}
			}
			q.push(mp(x,y));
			while(!q.empty()){
				auto [xx,yy]=q.front();
				q.pop();
				fup(k,2,3,1){
					int nx=xx+dx[k],ny=yy+dy[k];
					if(nx>=1 && nx<=n && ny>=1 && ny<=m && !a[nx][ny] && a[nx+1][ny] && a[nx][ny+1]){
						q.push(mp(nx,ny));
						a[nx][ny]=1;
						cnt[nx+ny]--;
					}
				}
			}
		}
	}
}

Compilation message (stderr)

furniture.cpp: In function 'int main()':
furniture.cpp:10:30: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
      |                              ^
furniture.cpp:48:2: note: in expansion of macro 'fup'
   48 |  fup(i,1,n,1)fup(j,1,m,1)scanf("%d",a[i]+j);
      |  ^~~
furniture.cpp:10:30: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
      |                              ^
furniture.cpp:48:14: note: in expansion of macro 'fup'
   48 |  fup(i,1,n,1)fup(j,1,m,1)scanf("%d",a[i]+j);
      |              ^~~
furniture.cpp:10:30: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
      |                              ^
furniture.cpp:49:2: note: in expansion of macro 'fup'
   49 |  fup(i,1,m,1)a[0][i]=a[n+1][i]=1;
      |  ^~~
furniture.cpp:10:30: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
      |                              ^
furniture.cpp:50:2: note: in expansion of macro 'fup'
   50 |  fup(i,1,n,1)a[i][0]=a[i][m+1]=1;
      |  ^~~
furniture.cpp:10:30: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
      |                              ^
furniture.cpp:51:2: note: in expansion of macro 'fup'
   51 |  fup(i,1,n,1){
      |  ^~~
furniture.cpp:10:30: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
      |                              ^
furniture.cpp:52:3: note: in expansion of macro 'fup'
   52 |   fup(j,1,m,1){
      |   ^~~
furniture.cpp:11:30: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   11 | #define fdn(i,a,b,c) for(int (i)=(a);(i)>=(b);(i)-=(c))
      |                              ^
furniture.cpp:57:2: note: in expansion of macro 'fdn'
   57 |  fdn(i,n,1,1){
      |  ^~~
furniture.cpp:11:30: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   11 | #define fdn(i,a,b,c) for(int (i)=(a);(i)>=(b);(i)-=(c))
      |                              ^
furniture.cpp:58:3: note: in expansion of macro 'fdn'
   58 |   fdn(j,m,1,1){
      |   ^~~
furniture.cpp:10:30: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
      |                              ^
furniture.cpp:63:2: note: in expansion of macro 'fup'
   63 |  fup(i,1,n,1){
      |  ^~~
furniture.cpp:10:30: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
      |                              ^
furniture.cpp:64:3: note: in expansion of macro 'fup'
   64 |   fup(j,1,m,1){
      |   ^~~
furniture.cpp:10:30: warning: unnecessary parentheses in declaration of 'k' [-Wparentheses]
   10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
      |                              ^
furniture.cpp:85:5: note: in expansion of macro 'fup'
   85 |     fup(k,0,1,1){
      |     ^~~
furniture.cpp:10:30: warning: unnecessary parentheses in declaration of 'k' [-Wparentheses]
   10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
      |                              ^
furniture.cpp:98:5: note: in expansion of macro 'fup'
   98 |     fup(k,2,3,1){
      |     ^~~
furniture.cpp:47:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |  scanf("%d%d",&n,&m);
      |  ~~~~~^~~~~~~~~~~~~~
furniture.cpp:48:31: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |  fup(i,1,n,1)fup(j,1,m,1)scanf("%d",a[i]+j);
      |                          ~~~~~^~~~~~~~~~~~~
furniture.cpp:69:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   69 |  scanf("%d",&q);
      |  ~~~~~^~~~~~~~~
furniture.cpp:72:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   72 |   scanf("%d%d",&x,&y);
      |   ~~~~~^~~~~~~~~~~~~~

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