oj.uz

Submission #296089

# Submission time Handle Problem Language Result Execution time Memory
296089 2020-09-10T09:01:30 Z groeneprof Furniture (JOI20_furniture) C++14
100 / 100
 3661 ms 28192 KB 
#include <bits/stdc++.h>

#define P(a) do{if(debug) cout<<a<<endl;} while(false)
#define H(a) P(#a<<": "<<a)
#define FR(i,a,b) for(int i = (a); i<(int)((b)); i++)
#define F(i,n) FR(i,0,n)
const int debug = 0;

using namespace std;

int n,m,Q;

bool inbounds(int x,int y){
	return x>=0 && x<n && y>=0 && y<m;
}


vector<vector<int> > C;
vector<vector<int> > A;
vector<vector<int> > B;
vector<vector<int> > D;
vector<int> vx,vy;
void updateB(int x, int y){
	if(!inbounds(x,y) || B[x][y] == 1){
		return;
	}
	if(C[x][y] == 1 || !((inbounds(x-1,y) && B[x-1][y]==0) || (inbounds(x,y-1) && B[x][y-1]==0))) {
		B[x][y] = 1;
		updateB(x+1,y);
		updateB(x,y+1);
	}

}

void updateA(int x, int y){
	if(!inbounds(x,y) || A[x][y] == 1){
		return;
	}
	if(C[x][y] == 1 || !((inbounds(x+1,y) && A[x+1][y]==0) || (inbounds(x,y+1) && A[x][y+1]==0))) {
		A[x][y] = 1;
		updateA(x-1,y);
		updateA(x,y-1);
	}

}


bool to00(int x, int y,vector<pair<int,int> >& path){
	if(!inbounds(x,y) || B[x][y] == 1) return false;
	path.push_back({x,y});
	if(rand()%2){
		if(inbounds(x-1,y) && B[x-1][y] == 0) {
			to00(x-1,y,path); 
			return true;
		}
		if(inbounds(x,y-1) && B[x][y-1] == 0) {
			to00(x,y-1,path); 
			return true;
		}
		return false;
	}
	else {
		if(inbounds(x,y-1) && B[x][y-1] == 0) {
			to00(x,y-1,path); 
			return true;
		}
		if(inbounds(x-1,y) && B[x-1][y] == 0) {
			to00(x-1,y,path); 
			return true;
		}
		return false;
	}
}

bool tonm(int x, int y,vector<pair<int,int> >& path){
	if(!inbounds(x,y) || A[x][y] == 1) return false;
	path.push_back({x,y});
	if(rand()%2){
		if(inbounds(x+1,y) && A[x+1][y] == 0) {
			tonm(x+1,y,path); 
			return true;
		}
		if(inbounds(x,y+1) && A[x][y+1] == 0) {
			tonm(x,y+1,path); 
			return true;
		}
		return false;
	}
	else {
		if(inbounds(x,y+1) && A[x][y+1] == 0) {
			tonm(x,y+1,path); 
			return true;
		}
		if(inbounds(x+1,y) && A[x+1][y] == 0) {
			tonm(x+1,y,path); 
			return true;
		}
		return false;
	}
}


int main(){
	//ios_base::sync_with_stdio(false);
	//cin.tie(0);
	cin>>n>>m;
	A.resize(n+1,vector<int> (m+1,0));
	B.resize(n+1,vector<int> (m+1,0));
	C.resize(n+1,vector<int> (m+1,0));
	D.resize(n+1,vector<int> (m+1,0));
	F(i,n) F(j,m){
		cin>>C[i][j];
	}

	F(i,n) F(j,m) {
		if(i!=0||j!=0) B[i][j] = 1;
		if(inbounds(i,j-1) && B[i][j-1]==0) B[i][j] = 0;
		if(inbounds(i-1,j) && B[i-1][j]==0) B[i][j] = 0;
		if(C[i][j] == 1) B[i][j] = 1;
	}
	for(int i = n-1; i>=0; i--) for(int j = m-1; j>=0; j--) {
		if(i!=n-1||j!=m-1) A[i][j] = 1;
		if(inbounds(i,j+1) && A[i][j+1]==0) A[i][j] = 0;
		if(inbounds(i+1,j) && A[i+1][j]==0) A[i][j] = 0;
		if(C[i][j] == 1) A[i][j] = 1;
	}

	vector<pair<int,int> > path;
	tonm(0,0,path);
	for(pair<int,int> pii : path){
		D[pii.first][pii.second] = 1;
	}
	if(debug){
		P("B");
		F(i,n){
			F(j,m){
				cout<<B[i][j]<<" ";
			}
			cout<<endl;
		}
		P("A");
		F(i,n){
			F(j,m){
				cout<<A[i][j]<<" ";
			}
			cout<<endl;
		}
		P("D");
		F(i,n){
			F(j,m){
				cout<<D[i][j]<<" ";
			}
			cout<<endl;
		}
	}
	bool boool = true;
	cin>>Q;
	F(q,Q){
		vx.clear();
		vy.clear();
		int x,y;
		cin>>x>>y;
		x--;
		y--;
		if(D[x][y]==0){
			C[x][y] = 1;
			updateB(x,y);
			updateA(x,y);
			//cout<<"a";
			cout<<1-B[n-1][m-1]<<endl;
			if(B[n-1][m-1] == 1) {
				if(debug){
					boool = false;
					cout<<"B: "<<endl;
					F(i,n){
						F(j,m){
							cout<<B[i][j]<<" ";
						}
						cout<<endl;
					}
					cout<<"A"<<endl;
					P("A");
					F(i,n){
						F(j,m){
							cout<<A[i][j]<<" ";
						}
						cout<<endl;
					}
					cout<<"D"<<endl;
					P("D");
					F(i,n){
						F(j,m){
							cout<<D[i][j]<<" ";
						}
						cout<<endl;
					}
					cout<<"C"<<endl;
					P("C");
					F(i,n){
						F(j,m){
							cout<<C[i][j]<<" ";
						}
						cout<<endl;
					}
				}
				F(i,vx.size()){
					B[vx[i]][vy[i]] = 0;
				}
				C[x][y] = 0;
			}
		}	 
		else{
			P("a");
			//cout<<"b";
			vector<pair<int,int> > path1;
			bool bol = false;
			F(i,x){
				if(inbounds(i,y+1) && A[i][y+1] == 0 && B[i][y+1] == 0){
					//vector<int> path1:
					to00(i,y+1,path1);
					tonm(i,y+1,path1);
					H(i);
					H(y+1);
					bol = true;
					break;
				}
			}
			if(!bol) FR(i,x+1,n){
				if(inbounds(i,y-1) && A[i][y-1] == 0 && B[i][y-1] == 0){
					//vector<int> path1;
					to00(i,y-1,path1);
					tonm(i,y-1,path1);
					H(i);
					H(y-1);
					bol = true;
					break;
				}
			}
			if(bol){
				cout<<1<<endl;
				C[x][y] = 1;
				updateA(x,y);
				updateB(x,y);
				for(pair<int,int> pii : path){
					D[pii.first][pii.second] = 0;
				}
				for(pair<int,int> pii : path1){
					D[pii.first][pii.second] = 1;
				}
				path = path1;
			}
			else{
				cout<<0<<endl;
			}
			if(debug){
					boool = false;
					cout<<"B: "<<endl;
					F(i,n){
						F(j,m){
							cout<<B[i][j]<<" ";
						}
						cout<<endl;
					}
					cout<<"A"<<endl;
					P("A");
					F(i,n){
						F(j,m){
							cout<<A[i][j]<<" ";
						}
						cout<<endl;
					}
					cout<<"D"<<endl;
					P("D");
					F(i,n){
						F(j,m){
							cout<<D[i][j]<<" ";
						}
						cout<<endl;
					}
					cout<<"C"<<endl;
					P("C");
					F(i,n){
						F(j,m){
							cout<<C[i][j]<<" ";
						}
						cout<<endl;
					}
				}

		}
		if(debug){
			P("B");
			F(i,n){
				F(j,m){
					cout<<B[i][j]<<" ";
				}
				cout<<endl;
			}
			P("A");
			F(i,n){
				F(j,m){
					cout<<A[i][j]<<" ";
				}
				cout<<endl;
			}
			P("D");
			F(i,n){
				F(j,m){
					cout<<D[i][j]<<" ";
				}
				cout<<endl;
			}
		}
	}

	return 0;
}

Compilation message

furniture.cpp: In function 'int main()':
furniture.cpp:156:7: warning: variable 'boool' set but not used [-Wunused-but-set-variable]
  156 |  bool boool = true;
      |       ^~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 12 ms 640 KB Output is correct
3 Correct 15 ms 512 KB Output is correct
4 Correct 28 ms 640 KB Output is correct
5 Correct 32 ms 640 KB Output is correct
6 Correct 33 ms 640 KB Output is correct
7 Correct 33 ms 640 KB Output is correct
8 Correct 34 ms 640 KB Output is correct
9 Correct 33 ms 640 KB Output is correct

Subtask #2
95.0 / 95.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 12 ms 640 KB Output is correct
3 Correct 15 ms 512 KB Output is correct
4 Correct 28 ms 640 KB Output is correct
5 Correct 32 ms 640 KB Output is correct
6 Correct 33 ms 640 KB Output is correct
7 Correct 33 ms 640 KB Output is correct
8 Correct 34 ms 640 KB Output is correct
9 Correct 33 ms 640 KB Output is correct
10 Correct 93 ms 1656 KB Output is correct
11 Correct 22 ms 640 KB Output is correct
12 Correct 1385 ms 20216 KB Output is correct
13 Correct 299 ms 16376 KB Output is correct
14 Correct 3145 ms 24364 KB Output is correct
15 Correct 3190 ms 23800 KB Output is correct
16 Correct 3468 ms 25836 KB Output is correct
17 Correct 3609 ms 27528 KB Output is correct
18 Correct 3615 ms 26760 KB Output is correct
19 Correct 3639 ms 28192 KB Output is correct
20 Correct 3464 ms 28008 KB Output is correct
21 Correct 3661 ms 28128 KB Output is correct