oj.uz

답안 #943226

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
943226 2024-03-11T09:27:48 Z WongYiKai 포탈들 (BOI14_portals) C++14
70 / 100
 215 ms 262144 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

ll r,c;

ll a(ll i, ll j) {
	return (i)*(c+2)+j;
}
pair<ll,ll> ra(ll x) {
	return {(x)/(c+2),(x)%(c+2)};
}


int main(){
	ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	cin >> r >> c;
	//if (r*c>100) return 0;
	ll grid[r+50][c+50];
	ll s,e;
	memset(grid,0,sizeof(grid));
	for (int i=1;i<=r;i++){
		string temp;
		cin >> temp;
		for (int j=1;j<=c;j++){
			if (temp[j-1]=='.') grid[i][j] = 1;
			else if (temp[j-1]=='#') grid[i][j] = 0;
			else if (temp[j-1]=='C') {
				grid[i][j] = 1;
				e = a(i,j);
			}
			else{
				grid[i][j] = 1;
				s = a(i,j);
			}
		}
	}
	ll visited[r*c*10];
	queue<pair<ll,ll>> bfs;
	memset(visited,0,sizeof(visited));
	for (int i=1;i<=r;i++){
		for (int j=1;j<=c;j++){
			if (grid[i][j]==0) continue;
			ll check=0;
			if (grid[i-1][j]==0) check=1;
			else if (grid[i+1][j]==0) check=1;
			else if (grid[i][j-1]==0) check=1;
			else if (grid[i][j+1]==0) check=1;
			if (check==0) continue;
			bfs.push({a(i,j),0});
			visited[a(i,j)]=1;
		}
	}
	ll dist[r*c*10];
	memset(dist,-1,sizeof(dist));
	while (!bfs.empty()){
		ll x = bfs.front().first;
		ll rnk = bfs.front().second;
		dist[x] = rnk;
		bfs.pop();
		ll item;
		pair<ll,ll> temp;
		item=x-1;
		if (visited[item]==0){
			temp = ra(item);
			if (grid[temp.first][temp.second]==1){
				visited[item] = 1;
				bfs.push({item,rnk+1});
			}
		}
		item=x+1;
		if (visited[item]==0){
			temp = ra(item);
			if (grid[temp.first][temp.second]==1){
				visited[item] = 1;
				bfs.push({item,rnk+1});
			}
		}
		item=x-c-2;
		if (visited[item]==0){
			temp = ra(item);
			if (grid[temp.first][temp.second]==1){
				visited[item] = 1;
				bfs.push({item,rnk+1});
			}
		}
		item=x+c+2;
		if (visited[item]==0){
			temp = ra(item);
			if (grid[temp.first][temp.second]==1){
				visited[item] = 1;
				bfs.push({item,rnk+1});
			}
		}
	}
	/*
	for (int i=1;i<=r;i++){
		for (int j=1;j<=c;j++){
			cout << dist[a(i,j)] << " ";
		}
		cout << "\n";
	}
	*/
	ll left[r*c*10],right[r*c*10],up[r*c*10],down[r*c*10];
	for (int j=1;j<=c;j++) up[a(0,j)] = a(0,j);
	for (int i=1;i<=r;i++){
		if (grid[i][1]==0) {
			left[a(i,1)]=a(i,1);
			up[a(i,1)]=a(i,1);
		}
		else {
			left[a(i,1)]=a(i,0);
			up[a(i,1)] = up[a(i-1,1)];
		}
		for (int j=2;j<=c;j++){
			if (grid[i][j]==0) {
				left[a(i,j)] = a(i,j);
				up[a(i,j)] = a(i,j);
			}
			else {
				left[a(i,j)] = left[a(i,j-1)];
				up[a(i,j)] = up[a(i-1,j)];
			}
		}
	}
	//right down
	for (int j=1;j<=c;j++) down[a(r+1,j)] = a(r+1,j);
	for (int i=r;i>=1;i--){
		if (grid[i][c]==0) {
			right[a(i,c)]=a(i,c);
			down[a(i,c)]=a(i,c);
		}
		else {
			right[a(i,c)]=a(i,c+1);
			down[a(i,c)] = down[a(i+1,c)];
		}
		for (int j=c-1;j>=1;j--){
			if (grid[i][j]==0) {
				right[a(i,j)] = a(i,j);
				down[a(i,j)] = a(i,j);
			}
			else {
				right[a(i,j)] = right[a(i,j+1)];
				down[a(i,j)] = down[a(i+1,j)];
			}
		}
	}
	/*
	cout << "left\n";
	for (int i=1;i<=r;i++){
		for (int j=1;j<=c;j++){
			cout << ra(left[a(i,j)]).first << "," << ra(left[a(i,j)]).second << " ";
		}
		cout << "\n";
	}
	cout << "right\n";
	for (int i=1;i<=r;i++){
		for (int j=1;j<=c;j++){
			cout << ra(right[a(i,j)]).first << "," << ra(right[a(i,j)]).second << " ";
		}
		cout << "\n";
	}
	cout << "down\n";
	for (int i=1;i<=r;i++){
		for (int j=1;j<=c;j++){
			cout << ra(down[a(i,j)]).first << "," << ra(down[a(i,j)]).second << " ";
		}
		cout << "\n";
	}
	cout << "up\n";
	for (int i=1;i<=r;i++){
		for (int j=1;j<=c;j++){
			cout << ra(up[a(i,j)]).first << "," << ra(up[a(i,j)]).second << " ";
		}
		cout << "\n";
	}
	*/
	
	vector<pair<ll,ll>> adj[r*c*10];
	for (int i=1;i<=r;i++){
		for (int j=1;j<=c;j++){
			if (grid[i][j]==0) continue;
			ll x = a(i,j);
			ll item;
			pair<ll,ll> temp;
			item=x-1;
			temp = ra(item);
			if (grid[temp.first][temp.second]==1){
				adj[x].push_back({item,1});
			}
			item=x+1;
			temp = ra(item);
			if (grid[temp.first][temp.second]==1){
				adj[x].push_back({item,1});
			}
			item=x-c-2;
			temp = ra(item);
			if (grid[temp.first][temp.second]==1){
				adj[x].push_back({item,1});
			}
			item=x+c+2;
			temp = ra(item);
			if (grid[temp.first][temp.second]==1){
				adj[x].push_back({item,1});
			}
			adj[x].push_back({left[x]+1,dist[x]+1});
			adj[x].push_back({down[x]-c-2,dist[x]+1});
			adj[x].push_back({up[x]+c+2,dist[x]+1});
			adj[x].push_back({right[x]-1,dist[x]+1});
		}
	}
	
	/*
	for (int i=1;i<=r;i++){
		for (int j=1;j<=c;j++){
			cout << i << "," << j << ": ";
			for (auto item:adj[a(i,j)]){
				cout << ra(item.first).first << "," << ra(item.first).second << "," << item.second << " ";
			}
			cout << "\n";
		}
	}
	*/
	
	ll dis[r*c*10];
	priority_queue<pair<ll,ll>,vector<pair<ll,ll>>,greater<pair<ll,ll>>> pq;
	memset(dis,-1,sizeof(dis));
	dis[s]=0;
	pq.push({0,s});
	while (!pq.empty())	{
		pair<ll,ll> cur = pq.top();
		pq.pop();
		ll x = cur.second, d = cur.first;
		if (d>dis[x]) continue;
		for (vector<pair<ll,ll>>::iterator it=adj[x].begin();it!=adj[x].end();++it){
			ll nx = it->first, nd = d+it->second;
			if (dis[nx]!=-1 && dis[nx]<=nd) continue;
			dis[nx] = nd;
			pq.push({nd,nx});
		}
	}
	
	/*
	for (int i=1;i<=r;i++){
		for (int j=1;j<=c;j++){
			cout << dis[a(i,j)] << " ";
		}
		cout << "\n";
	}
	*/
	cout << dis[e];	
	//cout << "a";
	
}

Compilation message

portals.cpp: In function 'int main()':
portals.cpp:251:15: warning: 'e' may be used uninitialized in this function [-Wmaybe-uninitialized]
  251 |  cout << dis[e];
      |               ^

Subtask #1
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 600 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 376 KB Output is correct
9 Correct 3 ms 2652 KB Output is correct
10 Correct 3 ms 2652 KB Output is correct
11 Correct 2 ms 2652 KB Output is correct
12 Correct 2 ms 2652 KB Output is correct
13 Correct 2 ms 2652 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 2 ms 2648 KB Output is correct
16 Correct 0 ms 348 KB Output is correct

Subtask #3
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 25 ms 35292 KB Output is correct
6 Correct 25 ms 35420 KB Output is correct
7 Correct 26 ms 35960 KB Output is correct
8 Correct 23 ms 35932 KB Output is correct

Subtask #4
19.0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 2 ms 2652 KB Output is correct
10 Correct 2 ms 2652 KB Output is correct
11 Correct 2 ms 2652 KB Output is correct
12 Correct 2 ms 2648 KB Output is correct
13 Correct 2 ms 2660 KB Output is correct
14 Correct 24 ms 35516 KB Output is correct
15 Correct 25 ms 35428 KB Output is correct
16 Correct 25 ms 35928 KB Output is correct
17 Correct 25 ms 35672 KB Output is correct
18 Correct 30 ms 36432 KB Output is correct
19 Correct 32 ms 38092 KB Output is correct
20 Correct 29 ms 37724 KB Output is correct
21 Correct 24 ms 35420 KB Output is correct
22 Correct 24 ms 35420 KB Output is correct
23 Correct 25 ms 35676 KB Output is correct
24 Correct 28 ms 37736 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 2 ms 2652 KB Output is correct
27 Correct 0 ms 344 KB Output is correct
28 Correct 22 ms 36048 KB Output is correct

Subtask #5
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 388 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 2 ms 2652 KB Output is correct
10 Correct 2 ms 2652 KB Output is correct
11 Correct 2 ms 2652 KB Output is correct
12 Correct 2 ms 2652 KB Output is correct
13 Correct 2 ms 2652 KB Output is correct
14 Correct 24 ms 35356 KB Output is correct
15 Correct 25 ms 35420 KB Output is correct
16 Correct 26 ms 35944 KB Output is correct
17 Correct 25 ms 35668 KB Output is correct
18 Correct 29 ms 36700 KB Output is correct
19 Correct 30 ms 37720 KB Output is correct
20 Correct 28 ms 37724 KB Output is correct
21 Correct 24 ms 35420 KB Output is correct
22 Correct 24 ms 35416 KB Output is correct
23 Correct 25 ms 35676 KB Output is correct
24 Runtime error 215 ms 262144 KB Execution killed with signal 9
25 Halted 0 ms 0 KB -