QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#739688#9170. Cycle Gameucup-team134WA 0ms4072kbC++174.0kb2024-11-12 22:41:542024-11-12 22:41:54

Judging History

你现在查看的是最新测评结果

  • [2024-11-12 22:41:54]
  • 评测
  • 测评结果:WA
  • 用时:0ms
  • 内存:4072kb
  • [2024-11-12 22:41:54]
  • 提交

answer

#include <bits/stdc++.h>

#define ll long long
#define pb push_back
#define f first
#define s second
#define sz(x) (int)(x).size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define ios ios_base::sync_with_stdio(false);cin.tie(NULL)
#define ld long double
#define li __int128

using namespace std;

mt19937 rng(time(NULL));

const int N=3e5+5;
struct dsu{
	vector<int> par;
	vector<bool> changed;
	vector<pair<int,int>> old;
	int cntComp,cntCompsnap;
	bool activeSnap;
	void reset(int n){
		par.resize(n);
		changed.resize(n);
		iota(all(par),0);
		fill(all(changed),0);
		old.clear();
		cntComp=n;
		activeSnap=0;
	}
	void snapshot(){
		for(auto p:old){
			changed[p.f]=0;
		}
		old.clear();
		cntCompsnap=cntComp;
		activeSnap=1;
	}
	void goToSnapshot(){
		for(auto p:old){
			par[p.f]=p.s;
			changed[p.f]=0;
		}
		old.clear();
		cntComp=cntCompsnap;
	}
	int find(int tr){
		if(tr==par[tr])return tr;
		int d=find(par[tr]);
		if(activeSnap&&d!=par[tr]&&!changed[tr]){
			changed[tr]=1;
			old.pb({tr,par[tr]});
		}
		par[tr]=d;
		return par[tr];
	}
	void merge(int a,int b){
		a=find(a);
		b=find(b);
		if(a==b)return;
		cntComp--;
		if(rng()%2)swap(a,b);
		if(activeSnap&&!changed[a]){
			changed[a]=1;
			old.pb({a,par[a]});
		}
		par[a]=b;
	}
}dsu;
vector<int> dx={1,1,1,0,-1,-1,-1,0},dy={1,0,-1,-1,-1,0,1,1};
int main()
{
	ios;
	int n,m,k;
	cin>>n>>m>>k;
	n+=2;
	m+=2;
	vector<pair<int,int>> ord;
	int C=540;
	auto inside=[&](int x,int y){
		return x>=0&&x<n&&y>=0&&y<m;
	};
	auto ind=[&](int x,int y){
		return x*m+y;
	};
	for(int i=0;i<k;i++){
		int x,y;
		cin >> x >> y;
		ord.pb({x,y});
	}
	vector<vector<bool>> on(n,vector<bool>(m));
	vector<vector<bool>> next(n,vector<bool>(m));
	int cntNext=0,cntNextOld=0;
	vector<pair<pair<int,int>,int>> back;
	auto reset=[&](){
		back.clear();
		cntNext=0;
		for(int i=0;i<n;i++){
			for(int j=0;j<m;j++){
				next[i][j]=0;
				if(on[i][j]){
					for(int kk=0;kk<8;kk++){
						int x=i+dx[kk],y=j+dy[kk];
						if(inside(x,y)&&!on[x][y]){
							next[i][j]=1;
							cntNext++;
							break;
						}
					}
				}
			}
		}
	};
	auto snap=[&](){
		back.clear();
		cntNextOld=cntNext;
	};
	auto add=[&](int i,int j){
		if(next[i][j]){
			back.pb({{i,j},1});
			next[i][j]=0;
			cntNext--;
		}
		for(int kk=0;kk<8;kk++){
			int x=i+dx[kk],y=j+dy[kk];
			if(inside(x,y)&&on[x][y]&&!next[x][y]){
				back.pb({{x,y},0});
				next[x][y]=1;
				cntNext++;
			}
		}
	};
	auto bac=[&](){
		reverse(all(back));
		for(auto p:back){
			next[p.f.f][p.f.s]=p.s;
		}
		back.clear();
		cntNext=cntNextOld;
	};
	vector<bool> ok(k,1);
	for(int i=0;i<k;){
		int ost=min(C,k-i);
		int j=i+ost;
		//printf("%i->%i\n",i,j);
		for(int o=i;o<j;o++){
			int x=ord[o].f,y=ord[o].s;
			on[x][y]=1;
		}
		dsu.reset(n*m);
		reset();
		for(int x=0;x<n;x++){
			for(int y=0;y<m;y++){
				if(!on[x][y]){
					for(int kk=0;kk<4;kk++){
						int xx=x+dx[kk],yy=y+dy[kk];
						if(inside(xx,yy)&&!on[xx][yy]){
							dsu.merge(ind(x,y),ind(xx,yy));
						}
					}
				}
			}
		}
		//printf("CntComp: %i\n",dsu.cntComp);
		while(1){
			if(dsu.cntComp-cntNext==1){ // everything is ok
				break;
			}
			dsu.snapshot();
			snap();
			for(int o=j-1;o>=i-1;o--){
				assert(o!=i-1);
				int x=ord[o].f,y=ord[o].s;
				assert(on[x][y]);
				on[x][y]=0;
				add(x,y);
				for(int kk=0;kk<8;kk++){
					int xx=x+dx[kk],yy=y+dy[kk];
					if(inside(xx,yy)&&!on[xx][yy]){
						dsu.merge(ind(x,y),ind(xx,yy));
					}
				}
				if(dsu.cntComp-cntNext==1){
					ok[o]=0;
					dsu.goToSnapshot();
					bac();
					add(x,y);
					for(int p=o+1;p<j;p++){
						on[ord[p].f][ord[p].s]=1;
					}
					for(int kk=0;kk<8;kk++){
						int xx=x+dx[kk],yy=y+dy[kk];
						if(inside(xx,yy)&&!on[xx][yy]){
							dsu.merge(ind(x,y),ind(xx,yy));
						}
					}
					break;
				}
			}
		}
		i=j;
	}
	for(int i=0;i<k;i++){
		printf(ok[i]?"1":"0");
	}
	printf("\n");
	return 0;
}

Details

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Test #1:

score: 100
Accepted
time: 0ms
memory: 4072kb

input:

4 3 7
2 1
2 2
2 3
3 1
3 2
4 1
4 2

output:

1111111

result:

ok "1111111"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3764kb

input:

3 3 8
1 1
1 2
1 3
2 3
3 3
3 2
3 1
2 1

output:

11111110

result:

ok "11111110"

Test #3:

score: 0
Accepted
time: 0ms
memory: 3832kb

input:

10 10 7
9 1
6 6
3 8
8 7
5 10
1 7
1 2

output:

1111111

result:

ok "1111111"

Test #4:

score: 0
Accepted
time: 0ms
memory: 3776kb

input:

9 10 50
1 9
1 6
2 3
3 1
7 4
9 4
1 3
2 5
9 2
7 9
5 6
8 10
9 5
5 5
4 10
9 7
5 9
3 2
4 5
1 1
4 7
3 6
2 8
4 3
8 6
5 10
4 8
5 4
7 2
9 6
4 2
7 8
5 2
3 5
9 1
6 1
1 5
9 9
5 8
6 3
8 8
8 4
7 7
7 1
3 7
2 2
3 10
6 9
8 3
7 6

output:

11111111111111111111111111111111111111111111111111

result:

ok "11111111111111111111111111111111111111111111111111"

Test #5:

score: 0
Accepted
time: 0ms
memory: 3828kb

input:

3 5 11
1 5
2 4
1 2
1 3
3 3
3 1
3 4
2 3
1 4
2 1
2 5

output:

11111111111

result:

ok "11111111111"

Test #6:

score: 0
Accepted
time: 0ms
memory: 3776kb

input:

7 9 12
7 3
2 3
6 2
2 2
4 2
2 8
5 7
4 4
6 8
2 7
7 2
1 9

output:

111111111111

result:

ok "111111111111"

Test #7:

score: 0
Accepted
time: 0ms
memory: 3764kb

input:

1 4 1
1 2

output:

1

result:

ok "1"

Test #8:

score: -100
Wrong Answer
time: 0ms
memory: 3832kb

input:

9 8 67
5 5
8 3
9 5
7 4
5 1
9 3
4 2
2 5
1 7
7 8
7 2
8 5
6 1
8 8
4 4
5 4
1 5
3 4
6 7
2 3
3 7
5 7
2 4
2 7
1 3
7 3
2 8
6 6
6 2
6 3
7 5
9 6
7 6
3 6
1 1
6 4
3 1
5 3
8 7
2 1
4 1
8 4
8 6
3 5
5 8
1 6
1 2
4 6
9 4
1 4
3 3
4 8
8 1
4 7
9 8
3 8
6 5
6 8
3 2
2 2
7 1
9 2
4 3
1 8
4 5
8 2
7 7

output:

1111111111111111111111111111111111111111111110010101101000101101100

result:

wrong answer 1st words differ - expected: '111111111111111111111111111111...1111111110010101101000101101101', found: '111111111111111111111111111111...1111111110010101101000101101100'