oj.uz

Submission #733386

# Submission time Handle Problem Language Result Execution time Memory
733386 2023-04-30T16:01:17 Z n0sk1ll Portals (BOI14_portals) C++17
100 / 100
 210 ms 155432 KB 
#include <bits/stdc++.h>

#define FAST ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);cerr.tie(0)
#define mp make_pair
#define xx first
#define yy second
#define pb push_back
#define pf push_front
#define popb pop_back
#define popf pop_front
#define all(x) x.begin(),x.end()
#define ff(i,a,b) for (int i = a; i < b; i++)
#define fff(i,a,b) for (int i = a; i <= b; i++)
#define bff(i,a,b) for (int i = b-1; i >= a; i--)
#define bfff(i,a,b) for (int i = b; i >= a; i--)

using namespace std;
long double typedef ld;
unsigned int typedef ui;
long long int typedef li;
pair<int,int> typedef pii;
pair<li,li> typedef pli;
pair<ld,ld> typedef pld;
vector<vector<int>> typedef graph;
unsigned long long int typedef ull;
//const int mod = 998244353;
const int mod = 1000000007;







//Note to self: Check for overflow

int n,m;
bool vis[1003][1003];
char tab[1003][1003];
bool portal[1003][1003];
vector<pii> placed;

bool moze(int i, int j)
{
    if (i<0 || i>=n) return false;
    if (j<0 || j>=m) return false;
    if (tab[i][j]=='#') return false;
    return true;
}

pii levo[1003][1003];
pii desno[1003][1003];
pii gore[1003][1003];
pii dole[1003][1003];

vector<pii> bfs[2'000'003];

int dist(int x, int y, pii sta)
{
    return abs(x-sta.xx) + abs(y-sta.yy);
}

int main()
{
    FAST;

    cin>>n>>m;
    ff(i,0,n) cin>>tab[i];

    ff(i,0,n) ff(j,0,m)
    {
        levo[i][j]={i,j};
        desno[i][j]={i,j};
        gore[i][j]={i,j};
        dole[i][j]={i,j};
    }

    ff(i,0,n) ff(j,0,m)
    {
        if (moze(i-1,j)) gore[i][j]=gore[i-1][j];
        if (moze(i,j-1)) levo[i][j]=levo[i][j-1];
    }
    bff(i,0,n) bff(j,0,m)
    {
        if (moze(i+1,j)) dole[i][j]=dole[i+1][j];
        if (moze(i,j+1)) desno[i][j]=desno[i][j+1];
    }

    ff(i,0,n) ff(j,0,m)
    {
        if (tab[i][j]=='S') bfs[0].pb({i,j});
    }

    fff(d,0,1'000'000) while (!bfs[d].empty())
    {
        auto [x,y]=bfs[d].back();
        bfs[d].popb();

        if (vis[x][y]) continue;
        vis[x][y]=true;
        if (tab[x][y]=='C') return cout<<d,0;

        pii U=gore[x][y];
        pii D=dole[x][y];
        pii L=levo[x][y];
        pii R=desno[x][y];

        int md=1'000'001;
        md=min(md,dist(x,y,U));
        md=min(md,dist(x,y,L));
        md=min(md,dist(x,y,R));
        md=min(md,dist(x,y,D));

        bfs[d+md+1].pb(U);
        bfs[d+md+1].pb(D);
        bfs[d+md+1].pb(L);
        bfs[d+md+1].pb(R);

        if (moze(x+1,y)) bfs[d+1].pb({x+1,y});
        if (moze(x-1,y)) bfs[d+1].pb({x-1,y});
        if (moze(x,y+1)) bfs[d+1].pb({x,y+1});
        if (moze(x,y-1)) bfs[d+1].pb({x,y-1});
    }
}

//Note to self: Check for overflow

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 47308 KB Output is correct
2 Correct 26 ms 47412 KB Output is correct
3 Correct 24 ms 47444 KB Output is correct
4 Correct 25 ms 47416 KB Output is correct
5 Correct 25 ms 47384 KB Output is correct
6 Correct 24 ms 47388 KB Output is correct
7 Correct 24 ms 47496 KB Output is correct
8 Correct 26 ms 47436 KB Output is correct
9 Correct 25 ms 47368 KB Output is correct
10 Correct 24 ms 47308 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 47232 KB Output is correct
2 Correct 27 ms 47412 KB Output is correct
3 Correct 28 ms 47472 KB Output is correct
4 Correct 24 ms 47312 KB Output is correct
5 Correct 24 ms 47504 KB Output is correct
6 Correct 27 ms 47444 KB Output is correct
7 Correct 23 ms 47420 KB Output is correct
8 Correct 25 ms 47428 KB Output is correct
9 Correct 28 ms 48496 KB Output is correct
10 Correct 25 ms 48468 KB Output is correct
11 Correct 25 ms 48400 KB Output is correct
12 Correct 27 ms 48376 KB Output is correct
13 Correct 27 ms 48340 KB Output is correct
14 Correct 29 ms 47296 KB Output is correct
15 Correct 28 ms 48320 KB Output is correct
16 Correct 27 ms 47388 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 47248 KB Output is correct
2 Correct 26 ms 47428 KB Output is correct
3 Correct 27 ms 47432 KB Output is correct
4 Correct 28 ms 47488 KB Output is correct
5 Correct 32 ms 53716 KB Output is correct
6 Correct 35 ms 53700 KB Output is correct
7 Correct 32 ms 53292 KB Output is correct
8 Correct 42 ms 54300 KB Output is correct

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 47284 KB Output is correct
2 Correct 27 ms 47444 KB Output is correct
3 Correct 26 ms 47408 KB Output is correct
4 Correct 28 ms 47308 KB Output is correct
5 Correct 28 ms 47484 KB Output is correct
6 Correct 30 ms 47396 KB Output is correct
7 Correct 28 ms 47388 KB Output is correct
8 Correct 28 ms 47380 KB Output is correct
9 Correct 31 ms 48424 KB Output is correct
10 Correct 25 ms 48336 KB Output is correct
11 Correct 26 ms 48332 KB Output is correct
12 Correct 25 ms 48372 KB Output is correct
13 Correct 25 ms 48352 KB Output is correct
14 Correct 33 ms 53708 KB Output is correct
15 Correct 30 ms 53712 KB Output is correct
16 Correct 30 ms 53232 KB Output is correct
17 Correct 30 ms 53708 KB Output is correct
18 Correct 31 ms 53724 KB Output is correct
19 Correct 32 ms 52284 KB Output is correct
20 Correct 31 ms 54124 KB Output is correct
21 Correct 31 ms 53840 KB Output is correct
22 Correct 29 ms 53588 KB Output is correct
23 Correct 33 ms 53652 KB Output is correct
24 Correct 31 ms 55372 KB Output is correct
25 Correct 28 ms 47396 KB Output is correct
26 Correct 25 ms 48308 KB Output is correct
27 Correct 25 ms 47308 KB Output is correct
28 Correct 33 ms 54176 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 47284 KB Output is correct
2 Correct 23 ms 47404 KB Output is correct
3 Correct 25 ms 47432 KB Output is correct
4 Correct 24 ms 47300 KB Output is correct
5 Correct 24 ms 47420 KB Output is correct
6 Correct 26 ms 47464 KB Output is correct
7 Correct 25 ms 47412 KB Output is correct
8 Correct 25 ms 47496 KB Output is correct
9 Correct 25 ms 48424 KB Output is correct
10 Correct 27 ms 48468 KB Output is correct
11 Correct 27 ms 48340 KB Output is correct
12 Correct 28 ms 48300 KB Output is correct
13 Correct 25 ms 48296 KB Output is correct
14 Correct 32 ms 53708 KB Output is correct
15 Correct 30 ms 53736 KB Output is correct
16 Correct 30 ms 53204 KB Output is correct
17 Correct 31 ms 53828 KB Output is correct
18 Correct 33 ms 53792 KB Output is correct
19 Correct 27 ms 52180 KB Output is correct
20 Correct 31 ms 54076 KB Output is correct
21 Correct 32 ms 53816 KB Output is correct
22 Correct 30 ms 53588 KB Output is correct
23 Correct 30 ms 53588 KB Output is correct
24 Correct 126 ms 119500 KB Output is correct
25 Correct 187 ms 155432 KB Output is correct
26 Correct 57 ms 88208 KB Output is correct
27 Correct 115 ms 117752 KB Output is correct
28 Correct 155 ms 121360 KB Output is correct
29 Correct 142 ms 121032 KB Output is correct
30 Correct 120 ms 105272 KB Output is correct
31 Correct 38 ms 55528 KB Output is correct
32 Correct 181 ms 154380 KB Output is correct
33 Correct 24 ms 47304 KB Output is correct
34 Correct 25 ms 48316 KB Output is correct
35 Correct 103 ms 113484 KB Output is correct
36 Correct 25 ms 47252 KB Output is correct
37 Correct 32 ms 54320 KB Output is correct
38 Correct 210 ms 133832 KB Output is correct
39 Correct 87 ms 102824 KB Output is correct