oj.uz

Submission #268796

# Submission time Handle Problem Language Result Execution time Memory
268796 2020-08-17T02:18:49 Z cpp219 Portals (BOI14_portals) C++14
100 / 100
 985 ms 109560 KB 
// Solid <candgenesis>
#include <bits/stdc++.h>
#define ll int
#define ld long double
#define fs first
#define sc second
using namespace std;
const ll N = 1e3 + 12;
const ll inf = 1e9 + 7;
typedef pair<ll,ll> LL;
char a[N][N];
ll n,m,i,j,d[N][N];
LL dp[N][N][4],start,en,direct[4];
vector<LL> g[N][N];
bool chk(ll x,ll y){
    return (x >= 1&&y >= 1&&x <= n&&y <= m);
}
ll dx[4] = {0,0,1,-1};
ll dy[4] = {1,-1,0,0};
LL DFS(ll x,ll y,ll cond){
    ll p = x + dx[cond],q = y + dy[cond];
    if (a[p][q] == '#') return {x,y};
    if (dp[p][q][cond].fs != 0) return dp[p][q][cond];
    return dp[p][q][cond] = DFS(p,q,cond);
}
struct Node{
    ll val,x,y;
};
bool operator < (Node x,Node y){
    return (x.val < y.val)||(x.val == y.val&&x.x < y.x)||(x.val == y.val&&x.x == y.x&&x.y < y.y);
}
void Dij(ll x,ll y){
    set<Node> s; d[x][y] = 0;
    s.insert({d[x][y],x,y});
    while(!s.empty()){
        Node t = *s.begin(); s.erase(s.begin());
        ll val = t.val;
        for (auto i : g[t.x][t.y]){
            ll u = i.fs,v = i.sc;
            if (a[u][v] == '#') continue;
            if (d[u][v] > val + 1){
                s.erase({d[u][v],u,v});
                d[u][v] = val + 1;
                s.insert({d[u][v],u,v});
            }
        }
        ll minn = inf;
        for (ll i = 0;i < 4;i++){
            direct[i] = DFS(t.x,t.y,i);
            minn = min(minn,abs(direct[i].fs - t.x) + abs(direct[i].sc - t.y));
        }
        for (ll i = 0;i < 4;i++){
            ll u = direct[i].fs,v = direct[i].sc;
            if (d[u][v] > val + 1 + minn){
                s.erase({d[u][v],u,v});
                d[u][v] = val + 1 + minn;
                s.insert({d[u][v],u,v});
            }
        }
    }
}
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    #define task "tst"
    if (fopen(task".inp", "r")){
        freopen(task".inp", "r", stdin);
        //freopen(task".out", "w", stdout);
    }
    cin>>n>>m;
    for (i = 0;i <= n + 1;i++){
        for (j = 0;j <= m + 1;j++){
            if (!i||!j||j > m||i > n) a[i][j] = '#';
            else{
                cin>>a[i][j]; d[i][j] = inf;
                if (a[i][j] == 'S') start = {i,j};
                if (a[i][j] == 'C') en = {i,j};
                for (ll k = 0;k < 4;k++){
                    ll p = i + dx[k],q = j + dy[k];
                    if (chk(p,q)) g[i][j].push_back({p,q});
                }
            }
        }
    }

    Dij(start.fs,start.sc);
    cout<<d[en.fs][en.sc];
}

Compilation message

portals.cpp: In function 'int main()':
portals.cpp:67:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   67 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 24448 KB Output is correct
2 Correct 17 ms 24448 KB Output is correct
3 Correct 17 ms 24448 KB Output is correct
4 Correct 17 ms 24448 KB Output is correct
5 Correct 17 ms 24448 KB Output is correct
6 Correct 17 ms 24448 KB Output is correct
7 Correct 17 ms 24448 KB Output is correct
8 Correct 19 ms 24448 KB Output is correct
9 Correct 17 ms 24448 KB Output is correct
10 Correct 17 ms 24448 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 24448 KB Output is correct
2 Correct 17 ms 24448 KB Output is correct
3 Correct 17 ms 24448 KB Output is correct
4 Correct 17 ms 24448 KB Output is correct
5 Correct 17 ms 24448 KB Output is correct
6 Correct 17 ms 24448 KB Output is correct
7 Correct 17 ms 24448 KB Output is correct
8 Correct 18 ms 24448 KB Output is correct
9 Correct 18 ms 25088 KB Output is correct
10 Correct 18 ms 25088 KB Output is correct
11 Correct 18 ms 25088 KB Output is correct
12 Correct 20 ms 25088 KB Output is correct
13 Correct 18 ms 25088 KB Output is correct
14 Correct 17 ms 24448 KB Output is correct
15 Correct 18 ms 25088 KB Output is correct
16 Correct 17 ms 24448 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 24448 KB Output is correct
2 Correct 17 ms 24448 KB Output is correct
3 Correct 17 ms 24576 KB Output is correct
4 Correct 17 ms 24448 KB Output is correct
5 Correct 33 ms 29304 KB Output is correct
6 Correct 36 ms 29304 KB Output is correct
7 Correct 36 ms 29304 KB Output is correct
8 Correct 31 ms 29312 KB Output is correct

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 24448 KB Output is correct
2 Correct 17 ms 24448 KB Output is correct
3 Correct 17 ms 24448 KB Output is correct
4 Correct 17 ms 24448 KB Output is correct
5 Correct 17 ms 24448 KB Output is correct
6 Correct 17 ms 24448 KB Output is correct
7 Correct 19 ms 24448 KB Output is correct
8 Correct 18 ms 24448 KB Output is correct
9 Correct 18 ms 25088 KB Output is correct
10 Correct 18 ms 25088 KB Output is correct
11 Correct 18 ms 25088 KB Output is correct
12 Correct 18 ms 25088 KB Output is correct
13 Correct 18 ms 25088 KB Output is correct
14 Correct 33 ms 29304 KB Output is correct
15 Correct 34 ms 29304 KB Output is correct
16 Correct 36 ms 29312 KB Output is correct
17 Correct 35 ms 29312 KB Output is correct
18 Correct 38 ms 29396 KB Output is correct
19 Correct 41 ms 29432 KB Output is correct
20 Correct 41 ms 29432 KB Output is correct
21 Correct 34 ms 29304 KB Output is correct
22 Correct 35 ms 29304 KB Output is correct
23 Correct 36 ms 29440 KB Output is correct
24 Correct 41 ms 29312 KB Output is correct
25 Correct 20 ms 24480 KB Output is correct
26 Correct 18 ms 25088 KB Output is correct
27 Correct 19 ms 24448 KB Output is correct
28 Correct 36 ms 29304 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 24448 KB Output is correct
2 Correct 17 ms 24448 KB Output is correct
3 Correct 18 ms 24448 KB Output is correct
4 Correct 17 ms 24448 KB Output is correct
5 Correct 19 ms 24448 KB Output is correct
6 Correct 18 ms 24576 KB Output is correct
7 Correct 18 ms 24448 KB Output is correct
8 Correct 18 ms 24448 KB Output is correct
9 Correct 18 ms 25088 KB Output is correct
10 Correct 18 ms 25088 KB Output is correct
11 Correct 18 ms 25088 KB Output is correct
12 Correct 18 ms 25088 KB Output is correct
13 Correct 21 ms 25088 KB Output is correct
14 Correct 34 ms 29432 KB Output is correct
15 Correct 39 ms 29440 KB Output is correct
16 Correct 36 ms 29304 KB Output is correct
17 Correct 36 ms 29312 KB Output is correct
18 Correct 39 ms 29560 KB Output is correct
19 Correct 43 ms 29312 KB Output is correct
20 Correct 40 ms 29560 KB Output is correct
21 Correct 33 ms 29380 KB Output is correct
22 Correct 35 ms 29304 KB Output is correct
23 Correct 37 ms 29432 KB Output is correct
24 Correct 555 ms 108300 KB Output is correct
25 Correct 985 ms 108796 KB Output is correct
26 Correct 763 ms 109176 KB Output is correct
27 Correct 761 ms 109560 KB Output is correct
28 Correct 437 ms 109176 KB Output is correct
29 Correct 504 ms 109048 KB Output is correct
30 Correct 585 ms 109012 KB Output is correct
31 Correct 39 ms 29312 KB Output is correct
32 Correct 813 ms 109176 KB Output is correct
33 Correct 17 ms 24448 KB Output is correct
34 Correct 21 ms 25088 KB Output is correct
35 Correct 615 ms 103160 KB Output is correct
36 Correct 17 ms 24448 KB Output is correct
37 Correct 31 ms 29304 KB Output is correct
38 Correct 400 ms 109048 KB Output is correct
39 Correct 443 ms 95352 KB Output is correct