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Submission #879994

# Submission time Handle Problem Language Result Execution time Memory
879994 2023-11-28T14:20:00 Z Karoot Portals (BOI14_portals) C++17
70 / 100
 209 ms 262144 KB 
#include <iostream>
#include <cmath>
#include <unordered_map>
#include <map>
#include <set>
#include <queue>
#include <vector>
#include <string>
#include <iomanip>
#include <algorithm>
 
#define all(x)  (x).begin(), (x).end()
#define rall(x)  (x).rbegin(), (x).rend()
 
using namespace std;
 
typedef long long ll;
 
ll linf = 1e15+1;
 
inline void scoobydoobydoo(){
    ios::sync_with_stdio(false);
    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);
}
 
const int MAXN = 1e3+97;
bool arr[MAXN][MAXN];
int closestWall[MAXN][MAXN];
bool isVisited[MAXN][MAXN];
pair<int, int> portals[MAXN][MAXN][4];
vector<pair<int, int> > walls;
unordered_map<int, queue<pair<int, int> >> portsZ;
 
int main(){
    scoobydoobydoo();
    //cout << 2 << endl;
    queue<vector<int>> q;
    //cout << "g" << endl;
    pair<int, int> start, ending;
    int r, c; cin >> r >> c;
 
    for (int i = 0; i <= c+1; i++){
        arr[0][i] = false;
        walls.push_back({0, i});
        q.push({0, i, 0});
    }
    
    for (int i = 1; i <= r; i++){
        arr[i][0] = false;
        walls.push_back({i, 0});
        q.push({i, 0, 0});
        isVisited[i][0] = true;
        for (int j = 1; j <= c; j++){
            char l; cin >> l;
            arr[i][j] = (l != '#');
            if (l == '#'){
                q.push({i, j, 0});
                walls.push_back({i, j});
                isVisited[i][j] = true;
            }
            if (l == 'S'){
                start = {i, j};
            }
            if (l == 'C'){
                ending = {i, j};
            }
        }
        arr[i][c+1] = false;
        walls.push_back({i, c+1});
        q.push({i, c+1, 0});
        isVisited[i][c+1] = true;
    }
    for (int i = 0; i <= c+1; i++){
        arr[r+1][i] = false;
        walls.push_back({r+1, i});
        q.push({r+1, i, 0});
    }
 
    while (!q.empty()){
        int i = q.front()[0];
        int j = q.front()[1];
        int w = q.front()[2];
        closestWall[i][j] = w;
        q.pop();
        if (i+1 < r && arr[i+1][j] && !isVisited[i+1][j]){
            q.push({i+1, j, w+1});
            isVisited[i+1][j] = true;
        }
        if (i-1 >= 0 && arr[i-1][j] && !isVisited[i-1][j]){
            q.push({i-1, j, w+1});
            isVisited[i-1][j] = true;
        }
        if (j+1 < c && arr[i][j+1] && !isVisited[i][j+1]){
            q.push({i, j+1, w+1});
            isVisited[i][j+1] = true;
        }
        if (j-1 >= 0 && arr[i][j-1] && !isVisited[i][j-1]){
            q.push({i, j-1, w+1});
            isVisited[i][j-1] = true;
        }
    }
 
    for (int i = 0; i <= r+1; i++){
        for (int j = 0; j <= c+1; j++){
            isVisited[i][j] = false;
        }
    }
 
    for (auto& e : walls){
        int i = e.first-1;
        int j = e.second;
        while (i >= 0 && arr[i][j]){
            portals[i][j][0] = {e.first-1, e.second};
            i--;
        }
        i = e.first+1;
        while (i <= r+1 && arr[i][j]){
            portals[i][j][1] = {e.first+1, e.second};
            i++;
        }
        i = e.first;
        j = e.second-1;
        while (j >= 0 && arr[i][j]){
            portals[i][j][2] = {e.first, e.second-1};
            j--;
        }
        j = e.second+1;
        while (j <= c+1 && arr[i][j]){
            portals[i][j][3] = {e.first, e.second+1};
            j++;
        }
    }
 
    queue<vector<int> > pq;
    pq.push({0, start.first, start.second});
    
    //int last = 0;
    while (!pq.empty()){
        int x = pq.front()[1];
        int y = pq.front()[2];
        int w = -pq.front()[0];
        //cout << x << " " << y << " " << w << endl;
        pq.pop();
        //if (vis[x][y])continue;
        if (x == ending.first && y == ending.second){
            cout << w << endl;
            return 0;
        }
        int closest = closestWall[x][y];
        //4 Dirs
        if (arr[x+1][y] && !isVisited[x+1][y]){
            pq.push({-(w+1), x+1, y});
            isVisited[x+1][y] = true;
        }
        if (arr[x-1][y] && !isVisited[x-1][y]){
            pq.push({-(w+1), x-1, y});
            isVisited[x-1][y] = true;
        }
        if (arr[x][y+1] && !isVisited[x][y+1]){
            pq.push({-(w+1), x, y+1});
            isVisited[x][y+1] = true;
        }
        if (arr[x][y-1] && !isVisited[x][y-1]){
            pq.push({-(w+1), x, y-1});
            isVisited[x][y-1] = true;
        }
 
        //4 Portals
 
        for (int i = 0; i < 4; i++){
            pair<int, int> e = portals[x][y][i];
            if (!isVisited[e.first][e.second]){
                portsZ[w+closest].push({e.first, e.second});
            }
        }
 
        while (!portsZ[w+1].empty()){
            int x1 = portsZ[w+1].front().first;
            int y1 = portsZ[w+1].front().second;
            portsZ[w+1].pop();
            if (!arr[x1][y1])continue;
            if (!isVisited[x1][y1]){
                isVisited[x1][y1] = true;
                pq.push({-(w+1), x1, y1});
            }
            
        }
        
    }
    
 
    
    
 
    
 
 
    return 0;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4440 KB Output is correct
7 Correct 1 ms 4440 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 1 ms 2392 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4696 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4440 KB Output is correct
9 Correct 1 ms 4440 KB Output is correct
10 Correct 1 ms 4700 KB Output is correct
11 Correct 1 ms 4956 KB Output is correct
12 Correct 1 ms 4700 KB Output is correct
13 Correct 1 ms 4700 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct
15 Correct 1 ms 4700 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4440 KB Output is correct
5 Correct 9 ms 15832 KB Output is correct
6 Correct 8 ms 14572 KB Output is correct
7 Correct 7 ms 14664 KB Output is correct
8 Correct 15 ms 32064 KB Output is correct

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4440 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 1 ms 4700 KB Output is correct
11 Correct 1 ms 4956 KB Output is correct
12 Correct 2 ms 4700 KB Output is correct
13 Correct 1 ms 4896 KB Output is correct
14 Correct 8 ms 15832 KB Output is correct
15 Correct 8 ms 14552 KB Output is correct
16 Correct 7 ms 14428 KB Output is correct
17 Correct 9 ms 14172 KB Output is correct
18 Correct 7 ms 14172 KB Output is correct
19 Correct 4 ms 13144 KB Output is correct
20 Correct 5 ms 13656 KB Output is correct
21 Correct 9 ms 16600 KB Output is correct
22 Correct 8 ms 14296 KB Output is correct
23 Correct 8 ms 14560 KB Output is correct
24 Correct 5 ms 13148 KB Output is correct
25 Correct 1 ms 4444 KB Output is correct
26 Correct 1 ms 4700 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 16 ms 31852 KB Output is correct

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 4440 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 1 ms 4700 KB Output is correct
11 Correct 1 ms 4956 KB Output is correct
12 Correct 1 ms 4700 KB Output is correct
13 Correct 2 ms 4700 KB Output is correct
14 Correct 8 ms 15832 KB Output is correct
15 Correct 7 ms 14572 KB Output is correct
16 Correct 7 ms 14524 KB Output is correct
17 Correct 7 ms 14172 KB Output is correct
18 Correct 9 ms 14172 KB Output is correct
19 Correct 4 ms 13148 KB Output is correct
20 Correct 5 ms 13912 KB Output is correct
21 Correct 9 ms 16600 KB Output is correct
22 Correct 8 ms 14544 KB Output is correct
23 Correct 7 ms 14428 KB Output is correct
24 Correct 166 ms 72744 KB Output is correct
25 Correct 147 ms 43612 KB Output is correct
26 Correct 75 ms 45904 KB Output is correct
27 Correct 146 ms 59760 KB Output is correct
28 Correct 209 ms 108520 KB Output is correct
29 Correct 179 ms 78700 KB Output is correct
30 Correct 167 ms 79304 KB Output is correct
31 Correct 5 ms 13148 KB Output is correct
32 Correct 159 ms 43272 KB Output is correct
33 Correct 1 ms 4444 KB Output is correct
34 Correct 1 ms 4700 KB Output is correct
35 Correct 117 ms 59044 KB Output is correct
36 Correct 0 ms 2396 KB Output is correct
37 Correct 15 ms 31920 KB Output is correct
38 Runtime error 193 ms 262144 KB Execution killed with signal 9
39 Halted 0 ms 0 KB -