Submission #949232

#	Time	Username	Problem	Language	Result	Execution time	Memory
949232		koukirocks	Worm Worries (BOI18_worm)	C++17	26 / 100	36 ms	1640 KiB

worm

#include <bits/stdc++.h>
#define speed ios_base::sync_with_stdio(0); cin.tie(0)
#define all(x) (x).begin(),(x).end()
#define F first
#define S second
 
using namespace std;
typedef long long ll;
typedef double db;
typedef long double ldb;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
 
const ll MAX=2e5+10,P=1e9+7;
const ll INF=0x3f3f3f3f,oo=0x3f3f3f3f3f3f3f3f;
 
int n,m,k,q;
const int dir[4][2]={{0,1},{0,-1},{1,0},{-1,0}};

int query(int x,int y,int z) {
	if (x>n or x<=0) return 0;
	if (y>m or y<=0) return 0;
	if (z>k or z<=0) return 0;
	cout<<"? "<<x<<" "<<y<<" "<<z<<"\n"<<flush;
	int ans;
	cin>>ans;
	if (ans==-1) exit(0);
	return ans;
}

pii dfs(int x,int y,int val,set<pii>& vis) {
	for (int k=0;k<4;k++) {
		int nx=x+dir[k][0];
		int ny=y+dir[k][1];
		if (vis.find(make_pair(nx,ny))==vis.end()) {
			int rlt=query(nx,ny,1);
			vis.insert({nx,ny});
			if (rlt>val) {
				return dfs(nx,ny,rlt,vis);
			}
		}
	}
	return {x,y};
}

struct pos {
	int x,y,z;
	pos (int _x,int _y,int _z):x(_x),y(_y),z(_z){};
	bool operator<(pos a) const {
		if (this->x!=a.x) return x<a.x;
		if (this->y!=a.y) return y<a.y;
		return this->z<a.z;
	}
};

const int dir2[6][3]={{0,0,1},{0,0,-1},{0,1,0},{0,-1,0},{1,0,0},{-1,0,0}};

pos dfs2(pos p,int val,set<pos>& vis) {
	for (int k=0;k<6;k++) {
		int nx=p.x+dir2[k][0];
		int ny=p.y+dir2[k][1];
		int nz=p.z+dir2[k][2];
		if (vis.find(pos(nx,ny,nz))==vis.end()) {
			int rlt=query(nx,ny,nz);
			vis.insert(pos(nx,ny,nz));
			if (rlt>val) {
				return dfs2(pos(nx,ny,nz),rlt,vis);
			}
		}
	}
	return p;
}

int main() {
	speed;
	cin>>n>>m>>k>>q;
	if (n==1000000) {
		mt19937 rnd(time(0)+3393848);
		uniform_int_distribution<int> pic(1,n);
		int maxx=0;
		int id=0;
		for (int i=0;i<n/5000;i++) {
			int now=pic(rnd);
//			cout<<now<<"\n";
			int rlt=query(now,1,1);
			if (rlt>maxx) {
				maxx=rlt;
				id=now;
			}
		}
		int dir=0;
		if (query(id+1,1,1)>maxx) {
			dir=1;
		}
		if (query(id-1,1,1)>maxx) {
			dir=-1;
		}
		if (dir==0) {
			cout<<"! "<<id<<" 1 1\n";
			return 0;
		}
		int now=id+dir;
		int val=query(now,1,1);
		int nxt=query(now+dir,1,1);
		while (nxt>val) {
			val=nxt;
			now+=dir;
			nxt=query(now+dir,1,1);
		}
		cout<<"! "<<now<<" 1 1"<<"\n";
	} else if (n==200) {
		mt19937 rnd(time(0)+3393848);
		uniform_int_distribution<int> picx(1,n),picy(1,m);
		int maxx=0;
		pii id={0,0};
		set<pii> vis;
		for (int i=0;i<n*m/400;i++) {
			int nx=picx(rnd);
			int ny=picy(rnd);
//			cout<<now<<"\n";
			int rlt=query(nx,ny,1);
			if (rlt>maxx) {
				maxx=rlt;
				id={nx,ny};
			}
			vis.insert({nx,ny});
		}
		auto [x,y]=dfs(id.F,id.S,maxx,vis);
		cout<<"! "<<x<<" "<<y<<" 1"<<"\n";
	} else if (n==100) {
		mt19937 rnd(time(0)+3393848);
		uniform_int_distribution<int> picx(1,n),picy(1,m),picz(1,k);
		int maxx=0;
		pos id(0,0,0);
		set<pos> vis;
		for (int i=0;i<n*m*k/5000;i++) {
			int nx=picx(rnd);
			int ny=picy(rnd);
			int nz=picz(rnd);
//			cout<<now<<"\n";
			int rlt=query(nx,ny,nz);
			if (rlt>maxx) {
				maxx=rlt;
				id=pos(nx,ny,nz);
			}
			vis.insert(pos(nx,ny,nz));
		}
		pos ans=dfs2(id,maxx,vis);
		cout<<"! "<<ans.x<<" "<<ans.y<<" "<<ans.z<<"\n";
	}
	return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 22
• Subtask 3: 12 / 12
• Subtask 4: 0 / 19
• Subtask 5: 14 / 14
• Subtask 6: 0 / 23