oj.uz

Submission #624587

# Submission time Handle Problem Language Result Execution time Memory
624587 2022-08-08T13:57:35 Z _Avocado_ Portals (BOI14_portals) C++14
100 / 100
 255 ms 31172 KB 
#include <bits/stdc++.h>
//#define int int64_t
using namespace std;

#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")

int n, m;
vector<pair<int, int>>delta = {{1, 0}, {-1, 0}, {0, 1}, {0, -1}};

struct wall{
	int up, down, left, right;
};

int check(int i, int j, auto&graph, auto&dist, int op){
	if(i < n && i>=0 && j < m && j>=0 && graph[i][j] != '#'){
		if(op){
			if(dist[i][j] == 1e9) return 1;
			return 0;
		}
		return 1;
	}
	return 0;
}

vector<vector<int>>bfs(auto&graph, auto&start){
	queue<pair<int, int>>q;
	vector<vector<int>>dist(n, vector<int>(m, (int)1e9));
	for(auto [x, y]: start){
		q.push({x, y});
		dist[x][y] = 0;
	}
	
	while(q.size()){
		int i = q.front().first;
		int j = q.front().second;
		q.pop();
		
		for(auto [x, y]: delta){
			if(check(i+x, j+y, graph, dist, 1)){
				dist[i+x][j+y] = dist[i][j] + 1;
				q.push({i+x, j+y});
			}
		}
	}
	
	return dist;
}

int spfa(auto&next, auto&w, auto&graph, pair<int, int>s, pair<int, int>e){
	vector<vector<int>>dist(n, vector<int>(m, 1e9));
	queue<pair<int, int>>q;
	q.push({s.first, s.second});
	dist[s.first][s.second] = 0;
	
	while(q.size()){
		auto [i, j] = q.front();
		q.pop();
		
		for(auto [x, y]: delta){
			if(check(i+x, j+y, graph, dist, 0) && dist[i][j]+1 < dist[i+x][j+y]){
				dist[i+x][j+y] = dist[i][j]+1;
				q.push({i+x, j+y});
			}
		}
		
		int cur = next[i][j];
		int nd = dist[i][j]+cur;
		if(check(w[i][j].up, j, graph, dist, 0) && nd < dist[w[i][j].up][j]){
			dist[w[i][j].up][j] = nd;
			q.push({w[i][j].up, j});
		}
		if(check(w[i][j].down, j, graph, dist, 0) && nd < dist[w[i][j].down][j]){
			dist[w[i][j].down][j] = nd;
			q.push({w[i][j].down, j});
		}
		if(check(i, w[i][j].right, graph, dist, 0) && nd < dist[i][w[i][j].right]){
			dist[i][w[i][j].right] = nd;
			q.push({i, w[i][j].right});
		}
		if(check(i, w[i][j].left, graph, dist, 0) && nd < dist[i][w[i][j].left]){
			dist[i][w[i][j].left] = nd;
			q.push({i, w[i][j].left});
		}
	}
	
	return dist[e.first][e.second];
}

signed main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	//ifstream cin ("input.in");
	//ofstream cout ("output.out");
	
	cin>>n>>m;
	
	m += 2;
	
	vector<string>graph;
	string border;
	for(int i = 0; i<m; ++i) border += '#';
	graph.push_back(border);
	
	for(int i = 0; i<n; ++i){
		string s; cin>>s;
		graph.push_back("#");
		for(auto u: s) graph[i+1] += u;
		graph[i+1] += '#';
	}
	
	graph.push_back(border);
	/*
	for(auto u: graph){
		for(auto v: u) cout<<v;
		cout<<endl;
	}
	cout<<endl;
	*/
	
	n += 2;
	
	vector<vector<wall>>w(n, vector<wall>(m));
	
	pair<int, int>s, e;
	vector<pair<int, int>>start;
	
	for(int i = 0; i<n; ++i){
		int cur = 0;
		for(int j = 0; j<m; ++j){
			if(graph[i][j] == 'S') s = {i, j};
			if(graph[i][j] == 'C') e = {i, j};
			if(graph[i][j] == '#'){
				cur = j;
				start.push_back({i, j});
			}
			w[i][j].left = cur+1;
		}
		cur = m-1;
		for(int j = m-1; j>=0; --j){
			if(graph[i][j] == '#') cur = j;
			w[i][j].right = cur-1;
		}
	}
	
	for(int j = 0; j<m; ++j){
		int cur = 0;
		for(int i = 0; i<n; ++i){
			if(graph[i][j] == '#') cur = i;
			w[i][j].up = cur+1;
		}
		cur = n-1;
		for(int i = n-1; i>=0; --i){
			if(graph[i][j] == '#') cur = i;
			w[i][j].down = cur-1;
		}
	}
	
	vector<vector<int>>next = bfs(graph, start);
	
	/*
	for(auto u: next){
		for(auto v: u) cout<<v<<" ";
		cout<<endl;
	}
	cout<<endl;
	*/
	
	cout<<spfa(next, w, graph, s, e);
	
	
	cout<<'\n';
}

Compilation message

portals.cpp:6: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    6 | #pragma GCC optimization ("O3")
      | 
portals.cpp:7: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    7 | #pragma GCC optimization ("unroll-loops")
      | 
portals.cpp:16:25: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   16 | int check(int i, int j, auto&graph, auto&dist, int op){
      |                         ^~~~
portals.cpp:16:37: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   16 | int check(int i, int j, auto&graph, auto&dist, int op){
      |                                     ^~~~
portals.cpp:27:24: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   27 | vector<vector<int>>bfs(auto&graph, auto&start){
      |                        ^~~~
portals.cpp:27:36: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   27 | vector<vector<int>>bfs(auto&graph, auto&start){
      |                                    ^~~~
portals.cpp: In function 'std::vector<std::vector<int> > bfs(auto:3&, auto:4&)':
portals.cpp:30:11: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   30 |  for(auto [x, y]: start){
      |           ^
portals.cpp:40:12: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   40 |   for(auto [x, y]: delta){
      |            ^
portals.cpp: At global scope:
portals.cpp:51:10: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   51 | int spfa(auto&next, auto&w, auto&graph, pair<int, int>s, pair<int, int>e){
      |          ^~~~
portals.cpp:51:21: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   51 | int spfa(auto&next, auto&w, auto&graph, pair<int, int>s, pair<int, int>e){
      |                     ^~~~
portals.cpp:51:29: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   51 | int spfa(auto&next, auto&w, auto&graph, pair<int, int>s, pair<int, int>e){
      |                             ^~~~
portals.cpp: In function 'int spfa(auto:5&, auto:6&, auto:7&, std::pair<int, int>, std::pair<int, int>)':
portals.cpp:58:8: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   58 |   auto [i, j] = q.front();
      |        ^
portals.cpp:61:12: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   61 |   for(auto [x, y]: delta){
      |            ^

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 316 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 320 KB Output is correct
10 Correct 1 ms 212 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 320 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 320 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 316 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 316 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 324 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 5 ms 1476 KB Output is correct
6 Correct 6 ms 1520 KB Output is correct
7 Correct 5 ms 1492 KB Output is correct
8 Correct 4 ms 1492 KB Output is correct

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 320 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 5 ms 1488 KB Output is correct
15 Correct 7 ms 1488 KB Output is correct
16 Correct 5 ms 1492 KB Output is correct
17 Correct 5 ms 1492 KB Output is correct
18 Correct 6 ms 1492 KB Output is correct
19 Correct 5 ms 1400 KB Output is correct
20 Correct 6 ms 1356 KB Output is correct
21 Correct 5 ms 1492 KB Output is correct
22 Correct 6 ms 1492 KB Output is correct
23 Correct 7 ms 1496 KB Output is correct
24 Correct 4 ms 1364 KB Output is correct
25 Correct 1 ms 320 KB Output is correct
26 Correct 1 ms 324 KB Output is correct
27 Correct 1 ms 212 KB Output is correct
28 Correct 6 ms 1492 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 216 KB Output is correct
7 Correct 1 ms 316 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 328 KB Output is correct
14 Correct 6 ms 1560 KB Output is correct
15 Correct 6 ms 1488 KB Output is correct
16 Correct 9 ms 1492 KB Output is correct
17 Correct 5 ms 1492 KB Output is correct
18 Correct 7 ms 1500 KB Output is correct
19 Correct 6 ms 1364 KB Output is correct
20 Correct 6 ms 1356 KB Output is correct
21 Correct 6 ms 1488 KB Output is correct
22 Correct 5 ms 1556 KB Output is correct
23 Correct 5 ms 1496 KB Output is correct
24 Correct 159 ms 29492 KB Output is correct
25 Correct 255 ms 27148 KB Output is correct
26 Correct 186 ms 27060 KB Output is correct
27 Correct 229 ms 27012 KB Output is correct
28 Correct 129 ms 31156 KB Output is correct
29 Correct 128 ms 31100 KB Output is correct
30 Correct 141 ms 31020 KB Output is correct
31 Correct 6 ms 1364 KB Output is correct
32 Correct 135 ms 26904 KB Output is correct
33 Correct 1 ms 324 KB Output is correct
34 Correct 1 ms 340 KB Output is correct
35 Correct 111 ms 28872 KB Output is correct
36 Correct 1 ms 212 KB Output is correct
37 Correct 4 ms 1492 KB Output is correct
38 Correct 92 ms 31172 KB Output is correct
39 Correct 97 ms 31116 KB Output is correct