Submission #826742

#	Time	Username	Problem	Language	Result	Execution time	Memory
826742		jamezzz	Cell Automaton (JOI23_cell)	C++17	32 / 100	452 ms	66876 KiB

cell

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

#define sf scanf
#define pf printf
#define fi first
#define se second
#define pb push_back
#define INF 2023456789
#define sz(x) ((int)x.size())
#define all(x) x.begin(),x.end()
typedef long long ll;
typedef pair<int,int> ii;
typedef pair<ll,ll> pll;

const int m=4000;

int n,k;
int num[2*m+5];
int grid[m+5][m+5];
int dx[4]={0,1,0,-1},dy[4]={1,0,-1,0};

int main(){
	sf("%d%d",&n,&k);
	vector<ii> v;
	bool st1=true,st2=true;
	for(int i=0;i<n;++i){
		int x,y;sf("%d%d",&x,&y);
		v.pb({x,y});
		st1=st1&&(max(abs(x),abs(y))<=1000);
		st2=st2&&(x==y);
	}
	if(st2){
		set<pll> s;
		ll tot=0;
		priority_queue<pll,vector<pll>,greater<pll>> pq;
		sort(all(v));
		for(int i=0;i<sz(v);++i){
			v[i]={v[i].fi+v[i].se,0};
			ll x=v[i].fi;
			if(i!=0){
				ll pv=v[i-1].fi;
				pq.push({x-pv,pv});
			}
			s.insert({x,x});
		}
		for(int i=0;i<k;++i){
			int x;sf("%d",&x);
			if(x==0){
				pf("%d\n",n);
				continue;
			}
			int bonus=0;
			while(!pq.empty()&&pq.top().fi<=2*x){
				auto[d,v]=pq.top();
				pq.pop();
				if(d==2*x)++bonus;
				auto it=--(s.upper_bound({v,INF}));
				assert(next(it)!=s.begin());
				pll pr=*it;
				assert(pr.fi<=v&&v<=pr.se);
				it=s.erase(it);
				assert(it!=s.end());
				pll pr2=*it;
				s.erase(it);
				tot-=pr.se-pr.fi;
				tot-=pr2.se-pr2.fi;
				tot+=pr2.se-pr.fi;
				s.insert({pr.fi,pr2.se});
			}
			int num=sz(s);
			pf("%lld\n",(ll)num*4*x+tot+(ll)bonus*(x-1));
		}
	}
	else if(st1){
		memset(grid,-1,sizeof grid);
		queue<ii> q;
		for(auto[x,y]:v){
			x+=m/2;y+=m/2;
			grid[x][y]=0;
			q.push({x,y});
		}
		while(!q.empty()){
			auto[x,y]=q.front();q.pop();
			for(int i=0;i<4;++i){
				int nx=x+dx[i],ny=y+dy[i];
				if(nx<0||ny<0||nx>=m||ny>=m)continue;
				if(grid[nx][ny]!=-1)continue;
				grid[nx][ny]=grid[x][y]+1;
				q.push({nx,ny});
			}
		}
		for(int i=0;i<m;++i){
			for(int j=0;j<m;++j){
				++num[grid[i][j]];
			}
		}
		for(int i=0;i<k;++i){
			int x;sf("%d",&x);
			pf("%d\n",num[x]);
		}
	}
}

Compilation message (stderr)

cell.cpp: In function 'int main()':
cell.cpp:24:4: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |  sf("%d%d",&n,&k);
      |    ^
cell.cpp:28:13: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 |   int x,y;sf("%d%d",&x,&y);
      |             ^
cell.cpp:48:12: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |    int x;sf("%d",&x);
      |            ^
cell.cpp:99:12: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   99 |    int x;sf("%d",&x);
      |            ^

• Subtask 1: 4 / 4
• Subtask 2: 12 / 12
• Subtask 3: 8 / 8
• Subtask 4: 8 / 8
• Subtask 5: 0 / 17
• Subtask 6: 0 / 25
• Subtask 7: 0 / 26