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Submission #945531

# Submission time Handle Problem Language Result Execution time Memory
945531 2024-03-14T03:42:14 Z yhkhoo Portals (BOI14_portals) C++17
100 / 100
 545 ms 144808 KB 
#include <bits/stdc++.h>
using namespace std;

typedef pair<int, int> pii;
typedef pair<int, pii> pipii;

#define mp make_pair
#define fi first
#define se second

const int INF=1e9;

int main(){
    // cin.tie(0); ios_base::sync_with_stdio(0);
    int r, c;
    cin >> r >> c;
    char m[r][c];
    vector<int> xw[r], yw[c];
    pii sl, cl;
    for(auto && i: xw){
        i.push_back(-1);
    }
    for(auto && i: yw){
        i.push_back(-1);
    }
    for(int i=0; i<r; i++){
        for(int j=0; j<c; j++){
            cin >> m[i][j];
            if(m[i][j] == '#'){
                xw[i].push_back(j);
                yw[j].push_back(i);
            }
            else if(m[i][j] == 'S'){
                sl = mp(i, j);
            }
            else if(m[i][j] == 'C'){
                cl = mp(i, j);
            }
        }
    }
    for(auto && i: xw){
        i.push_back(c);
    }
    for(auto && i: yw){
        i.push_back(r);
    }
    queue<pii> wq;
    int dw[r][c];
    memset(dw, -1, sizeof(dw));
    vector<pipii> al[r][c];
    const int dx[] = {-1, 1, 0, 0};
    const int dy[] = {0, 0, -1, 1};
    for(int i=0; i<r; i++){
        for(int j=0; j<c; j++){
            for(int k=0; k<4; k++){
                int nx = i+dx[k], ny = j+dy[k];
                if(nx == -1 || ny == -1 || nx == r || ny== c || m[nx][ny] == '#'){
                    if(dw[i][j] == 1) continue;
                    wq.emplace(i, j);
                    dw[i][j] = 1;
                }
                else{
                    al[i][j].emplace_back(1, mp(nx, ny));
                }
            }
        }
    }
    while(wq.size()){
        auto[cx, cy] = wq.front();
        wq.pop();
        for(int k=0; k<4; k++){
            int nx = cx+dx[k], ny = cy+dy[k];
            if(nx == -1 || ny == -1 || nx == r || ny == c) continue;
            if(m[nx][ny] == '#') continue;
            if(dw[nx][ny] != -1) continue;
            dw[nx][ny] = dw[cx][cy] + 1;
            wq.emplace(nx, ny);
        }
    }
    /*for(int i=0; i<r; i++){
		for(int j=0; j<c; j++){
			cout << dw[i][j] << ' ';
		}
		cout << '\n';
	}*/
    for(int i=0; i<r; i++){
        for(int j=0; j<c; j++){
            if(m[i][j] == '#') continue;
            vector<int>::iterator xw1, xw2, yw1, yw2;
            xw2 = upper_bound(xw[i].begin(), xw[i].end(), j);
            xw1 = xw2-1;
            yw2 = upper_bound(yw[j].begin(), yw[j].end(), i);
            yw1 = yw2-1;
            // dw[i][j] = 69420;
            if(*xw2 - j > 2) al[i][j].emplace_back(dw[i][j], mp(i, (*xw2)-1));
            if(j - *xw1 > 2) al[i][j].emplace_back(dw[i][j], mp(i, (*xw1)+1));
            if(*yw2 - i > 2) al[i][j].emplace_back(dw[i][j], mp((*yw2)-1, j));
            if(i - *yw1 > 2) al[i][j].emplace_back(dw[i][j], mp((*yw1)+1, j));
        }
    }
    /*for(int i=0; i<r; i++){
        for(int j=0; j<c; j++){
            cout << i << ' ' << j << ':' << ' ';
            for(auto k: al[i][j]){
                cout << k.fi << '{' << k.se.fi << ',' << k.se.se << '}' << ' ';
            }
            cout << '\n';
        }
    }*/
    priority_queue<pipii, vector<pipii>, greater<pipii>> pq;
    int dst[r][c];
    bool visited[r][c];
    for(int i=0; i<r; i++){
		for(int j=0; j<c; j++){
			dst[i][j] = INF;
		}
	}
    memset(visited, 0, sizeof(visited));
    dst[sl.fi][sl.se] = 0;
    pq.emplace(0, sl);
    while(pq.size()){
        auto[cd, cxy] = pq.top();
        pq.pop();
        auto[cx, cy] = cxy;
        if(visited[cx][cy]) continue;
        for(auto [nw, nxy] : al[cx][cy]){
            auto[nx, ny] = nxy;
            if(dst[nx][ny] > cd+nw){
                dst[nx][ny] = cd+nw;
                pq.emplace(dst[nx][ny], nxy);
            }
        }
        visited[cx][cy] = true;
    }
    cout << dst[cl.fi][cl.se];
    return 0;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory 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 1 ms 348 KB Output is correct
10 Correct 0 ms 600 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory 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 344 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 1 ms 604 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 1 ms 600 KB Output is correct
12 Correct 1 ms 600 KB Output is correct
13 Correct 1 ms 604 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 1 ms 348 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 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 13 ms 4184 KB Output is correct
6 Correct 16 ms 4444 KB Output is correct
7 Correct 15 ms 4700 KB Output is correct
8 Correct 9 ms 3676 KB Output is correct

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 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 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 1 ms 600 KB Output is correct
12 Correct 1 ms 604 KB Output is correct
13 Correct 1 ms 604 KB Output is correct
14 Correct 16 ms 4188 KB Output is correct
15 Correct 16 ms 4316 KB Output is correct
16 Correct 15 ms 4700 KB Output is correct
17 Correct 15 ms 4956 KB Output is correct
18 Correct 17 ms 5676 KB Output is correct
19 Correct 16 ms 6232 KB Output is correct
20 Correct 15 ms 6236 KB Output is correct
21 Correct 13 ms 4184 KB Output is correct
22 Correct 14 ms 4184 KB Output is correct
23 Correct 14 ms 4444 KB Output is correct
24 Correct 15 ms 6224 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 1 ms 604 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 9 ms 3676 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory 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 1 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 1 ms 604 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 1 ms 600 KB Output is correct
12 Correct 1 ms 600 KB Output is correct
13 Correct 1 ms 600 KB Output is correct
14 Correct 13 ms 4188 KB Output is correct
15 Correct 14 ms 4444 KB Output is correct
16 Correct 15 ms 4688 KB Output is correct
17 Correct 14 ms 4956 KB Output is correct
18 Correct 17 ms 5628 KB Output is correct
19 Correct 17 ms 6236 KB Output is correct
20 Correct 17 ms 6236 KB Output is correct
21 Correct 13 ms 4188 KB Output is correct
22 Correct 13 ms 4192 KB Output is correct
23 Correct 14 ms 4444 KB Output is correct
24 Correct 508 ms 120288 KB Output is correct
25 Correct 545 ms 144560 KB Output is correct
26 Correct 538 ms 144628 KB Output is correct
27 Correct 496 ms 144808 KB Output is correct
28 Correct 451 ms 96232 KB Output is correct
29 Correct 462 ms 97764 KB Output is correct
30 Correct 494 ms 99552 KB Output is correct
31 Correct 15 ms 5980 KB Output is correct
32 Correct 525 ms 144156 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 1 ms 604 KB Output is correct
35 Correct 435 ms 115748 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 9 ms 3676 KB Output is correct
38 Correct 292 ms 85888 KB Output is correct
39 Correct 326 ms 86268 KB Output is correct