oj.uz

Submission #585077

# Submission time Handle Problem Language Result Execution time Memory
585077 2022-06-28T09:46:17 Z MohammadAghil Portals (BOI14_portals) C++17
100 / 100
 362 ms 85848 KB 
#include <bits/stdc++.h>
#pragma GCC optimize ("Ofast,unroll-loops")

using namespace std;

typedef long long ll;
typedef pair<int, int> pp;

#define rep(i,l,r) for(int i = (l); i < (r); i++)
#define per(i,r,l) for(int i = (r); i >= (l); i--)
#define sz(x) (int)x.size()
#define ff first
#define ss second
#define all(x) begin(x), end(x)
#define pb push_back

const ll mod = 1e9+7, maxn = 1e3+2, inf = ll(1e9)+5;

int dx[4] = {-1, 0, 1, 0}, dy[4] = {0, 1, 0, -1};
int dist_wall[maxn][maxn];
pp ad[maxn][maxn][4];
pp st, en;
bool wall[maxn][maxn];
int n, m;

void clc_bfs_wall(){
     deque<pp> q;
     rep(i,0,n+2) rep(j,0,m+2) {
          dist_wall[i][j] = inf;
          if(wall[i][j]) dist_wall[i][j] = 0, q.pb({i, j});
     }
     while(sz(q)){
          auto[i, j] = q.front(); q.pop_front();
          rep(d,0,4){
               int x = dx[d] + i, y = dy[d] + j;
               if(x > 0 && x <= n && y > 0 && y <= m && !wall[x][y] && dist_wall[x][y] == inf)
                    dist_wall[x][y] = dist_wall[i][j] + 1, q.pb({x, y});
          }
     }
}

vector<pair<int, pp>> adj(int i, int j){
     vector<pair<int, pp>> res;
     rep(d,0,4){
          int x = dx[d] + i, y = dy[d] + j;
          if(x > 0 && x <= n && y > 0 && y <= m && !wall[x][y]) res.pb({1, {x, y}});
     }
     rep(d,0,4) if(ad[i][j][d].ff + 1) res.pb({dist_wall[i][j], ad[i][j][d]});
     return res;
}

void clc_portal_edge(){
     rep(i,0,n+2) rep(j,0,m+2) rep(d,0,4) ad[i][j][d] = {-1, -1};
     rep(i,0,n+2) rep(j,0,m+2) {
          if(wall[i][j]) rep(d,0,4){
               int x = i + dx[d], y = j + dy[d];
               int a = x, b = y;
               while(x > 0 && x <= n && y > 0 && y <= m && !wall[x][y]) ad[x][y][d] = {a, b}, x += dx[d], y += dy[d];
          }
     }
}

int dijkstra(){
     vector<vector<pp>> vc(n*m);
     vc[0].pb(st);
     vector<vector<int>> dist(n + 2, vector<int>(m + 2, inf)); dist[st.ff][st.ss] = 0;
     rep(i,0,sz(vc)){
          for(pp c: vc[i]){
               if(dist[c.ff][c.ss] - i) continue;
               if(c == en) return i;
               for(auto[w, p]: adj(c.ff, c.ss)) if(dist[p.ff][p.ss] > i + w)
                    vc[dist[p.ff][p.ss] = i + w].pb(p);
          }
     }
     return -1;
}

int main(){
     cin.tie(0) -> sync_with_stdio(0);
     cin >> n >> m;
     rep(i,0,n+2) rep(j,0,m+2) wall[i][j] = true;
     rep(i,1,n+1) rep(j,1,m+1){
          char c; cin >> c;
          if(c == '#') continue;
          if(c == 'S') st = {i, j};
          else if(c == 'C') en = {i, j};
          wall[i][j] = false;
     }
     clc_bfs_wall();
     clc_portal_edge();
     cout << dijkstra() << '\n';
     return 0;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 468 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 980 KB Output is correct
10 Correct 1 ms 980 KB Output is correct
11 Correct 1 ms 980 KB Output is correct
12 Correct 1 ms 980 KB Output is correct
13 Correct 1 ms 904 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 972 KB Output is correct
16 Correct 0 ms 328 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 456 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 12 ms 4852 KB Output is correct
6 Correct 10 ms 4820 KB Output is correct
7 Correct 9 ms 4692 KB Output is correct
8 Correct 11 ms 5460 KB Output is correct

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 328 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 328 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 980 KB Output is correct
10 Correct 1 ms 976 KB Output is correct
11 Correct 2 ms 980 KB Output is correct
12 Correct 1 ms 980 KB Output is correct
13 Correct 2 ms 980 KB Output is correct
14 Correct 13 ms 4800 KB Output is correct
15 Correct 11 ms 4748 KB Output is correct
16 Correct 9 ms 4692 KB Output is correct
17 Correct 11 ms 4820 KB Output is correct
18 Correct 10 ms 4720 KB Output is correct
19 Correct 4 ms 4564 KB Output is correct
20 Correct 7 ms 4820 KB Output is correct
21 Correct 11 ms 4820 KB Output is correct
22 Correct 11 ms 4700 KB Output is correct
23 Correct 10 ms 4820 KB Output is correct
24 Correct 10 ms 4948 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 980 KB Output is correct
27 Correct 1 ms 332 KB Output is correct
28 Correct 10 ms 5292 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 2 ms 972 KB Output is correct
10 Correct 1 ms 980 KB Output is correct
11 Correct 1 ms 972 KB Output is correct
12 Correct 1 ms 980 KB Output is correct
13 Correct 1 ms 980 KB Output is correct
14 Correct 11 ms 4812 KB Output is correct
15 Correct 12 ms 4756 KB Output is correct
16 Correct 9 ms 4692 KB Output is correct
17 Correct 10 ms 4692 KB Output is correct
18 Correct 10 ms 4820 KB Output is correct
19 Correct 4 ms 4564 KB Output is correct
20 Correct 7 ms 4820 KB Output is correct
21 Correct 11 ms 4844 KB Output is correct
22 Correct 11 ms 4812 KB Output is correct
23 Correct 10 ms 4820 KB Output is correct
24 Correct 238 ms 72056 KB Output is correct
25 Correct 362 ms 72912 KB Output is correct
26 Correct 89 ms 66064 KB Output is correct
27 Correct 178 ms 70276 KB Output is correct
28 Correct 268 ms 72704 KB Output is correct
29 Correct 258 ms 71820 KB Output is correct
30 Correct 224 ms 70412 KB Output is correct
31 Correct 11 ms 4948 KB Output is correct
32 Correct 296 ms 75120 KB Output is correct
33 Correct 0 ms 340 KB Output is correct
34 Correct 1 ms 980 KB Output is correct
35 Correct 175 ms 70052 KB Output is correct
36 Correct 1 ms 340 KB Output is correct
37 Correct 10 ms 5332 KB Output is correct
38 Correct 240 ms 85848 KB Output is correct
39 Correct 143 ms 68468 KB Output is correct