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Submission #942967

# Submission time Handle Problem Language Result Execution time Memory
942967 2024-03-11T07:23:46 Z beepbeepsheep Portals (BOI14_portals) C++17
100 / 100
 165 ms 158212 KB 
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define ii pair<ll,ll>

const ll maxn=1005;
char grid[maxn][maxn];
ll dis[maxn][maxn];
ii wall[maxn][maxn][4]; //N,E,S,W
ll hasWall[maxn][maxn];
ll dx[4]={1,0,-1,0};
ll dy[4]={0,1,0,-1};
vector<ii> v[1000005];
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    ll r,c;
    ii s,e;
    cin>>r>>c;
    for (int i=0;i<=r+1;i++){
        for (int j=0;j<=c+1;j++){
            grid[i][j]='#';
        }
    }
    for (int i=1;i<=r;i++){
        for (int j=1;j<=c;j++){
            cin>>grid[i][j];
            if (grid[i][j]=='S') s={i,j};
            if (grid[i][j]=='C') e={i,j};
        }
    }
    memset(dis,63,sizeof(dis));
    memset(hasWall,63,sizeof(hasWall));
    for (int i=1;i<=r;i++){
        ii p={0,0};
        ll cnt=0;
        for (int j=0;j<=c+1;j++){
            if (grid[i][j]=='#')
                p={i,j+1},cnt=0;
            else{
                wall[i][j][0]=p;
                cnt++;
                hasWall[i][j]=min(hasWall[i][j],cnt);
            }
            //first open square
        }
    }
    for (int i=1;i<=c;i++){
        ii p={0,0};
        ll cnt=0;
        for (int j=0;j<=r+1;j++){
            if (grid[j][i]=='#'){
                p={j+1,i},cnt=0;
            }
            else{
                cnt++;
                wall[j][i][1]=p;
                hasWall[j][i]=min(hasWall[j][i],cnt);
            }
        }
    }
    for (int i=1;i<=r;i++){
        ii p={0,0};
        ll cnt=0;
        for (int j=c+1;j>=0;j--){
            if (grid[i][j]=='#')
                p={i,j-1}, cnt=0;
            else{
                cnt++;
                wall[i][j][2]=p;
                hasWall[i][j]=min(hasWall[i][j],cnt);
            }
        }
    }
    for (int i=1;i<=c;i++){
        ii p={0,0};
        ll cnt=0;
        for (int j=r+1;j>=0;j--){
            if (grid[j][i]=='#'){
                p={j-1,i};
                cnt=0;
            }
            else{
                cnt++;
                wall[j][i][3]=p;
                hasWall[j][i]=min(hasWall[j][i],cnt);
            }
        }
    }
    v[0].emplace_back(s);
    cerr<<1<<endl;
    ll d=0;
    while (d!=1000005){
        ll x,y;
        while (v[d].empty()) d++;
        tie(x,y)=v[d].back();
        //cerr<<d<<' '<<x<<' '<<y<<endl;
        v[d].pop_back();
        if (dis[x][y]<=d) continue;
        dis[x][y]=d;
        if (make_pair(x,y)==e) break;
        for (int i=0;i<4;i++){
            ll nx=wall[x][y][i].first,ny=wall[x][y][i].second;
            if (dis[nx][ny]<=d+hasWall[x][y]) continue;
            v[d+hasWall[x][y]].emplace_back(nx,ny);
        }
        for (int i=0;i<4;i++){
            ll nx=x+dx[i],ny=y+dy[i];
            if (grid[nx][ny]=='#') continue;
            if (dis[nx][ny]<=d+1) continue;
            v[d+1].emplace_back(nx,ny);
        }
    }
    cout<<dis[e.first][e.second];
    return 0;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 41564 KB Output is correct
2 Correct 9 ms 41564 KB Output is correct
3 Correct 9 ms 41680 KB Output is correct
4 Correct 8 ms 41564 KB Output is correct
5 Correct 8 ms 41564 KB Output is correct
6 Correct 9 ms 41564 KB Output is correct
7 Correct 8 ms 41584 KB Output is correct
8 Correct 9 ms 41560 KB Output is correct
9 Correct 8 ms 41652 KB Output is correct
10 Correct 8 ms 41660 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 41564 KB Output is correct
2 Correct 8 ms 41604 KB Output is correct
3 Correct 8 ms 41564 KB Output is correct
4 Correct 8 ms 41560 KB Output is correct
5 Correct 9 ms 41560 KB Output is correct
6 Correct 8 ms 41564 KB Output is correct
7 Correct 9 ms 41564 KB Output is correct
8 Correct 8 ms 41564 KB Output is correct
9 Correct 9 ms 43856 KB Output is correct
10 Correct 9 ms 43868 KB Output is correct
11 Correct 9 ms 43704 KB Output is correct
12 Correct 8 ms 43608 KB Output is correct
13 Correct 9 ms 43832 KB Output is correct
14 Correct 8 ms 41564 KB Output is correct
15 Correct 8 ms 43612 KB Output is correct
16 Correct 8 ms 41648 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 41816 KB Output is correct
2 Correct 8 ms 41564 KB Output is correct
3 Correct 8 ms 41564 KB Output is correct
4 Correct 9 ms 41684 KB Output is correct
5 Correct 15 ms 54876 KB Output is correct
6 Correct 13 ms 55132 KB Output is correct
7 Correct 14 ms 54620 KB Output is correct
8 Correct 14 ms 55300 KB Output is correct

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 41560 KB Output is correct
2 Correct 8 ms 41564 KB Output is correct
3 Correct 8 ms 41676 KB Output is correct
4 Correct 9 ms 41564 KB Output is correct
5 Correct 8 ms 41564 KB Output is correct
6 Correct 9 ms 41560 KB Output is correct
7 Correct 9 ms 41692 KB Output is correct
8 Correct 8 ms 41604 KB Output is correct
9 Correct 9 ms 43648 KB Output is correct
10 Correct 9 ms 43864 KB Output is correct
11 Correct 9 ms 43608 KB Output is correct
12 Correct 9 ms 43608 KB Output is correct
13 Correct 10 ms 43700 KB Output is correct
14 Correct 13 ms 55128 KB Output is correct
15 Correct 13 ms 55132 KB Output is correct
16 Correct 12 ms 54860 KB Output is correct
17 Correct 13 ms 55128 KB Output is correct
18 Correct 13 ms 55164 KB Output is correct
19 Correct 11 ms 54108 KB Output is correct
20 Correct 13 ms 56668 KB Output is correct
21 Correct 14 ms 54872 KB Output is correct
22 Correct 12 ms 54872 KB Output is correct
23 Correct 13 ms 54876 KB Output is correct
24 Correct 12 ms 55668 KB Output is correct
25 Correct 8 ms 41604 KB Output is correct
26 Correct 9 ms 43612 KB Output is correct
27 Correct 9 ms 41608 KB Output is correct
28 Correct 13 ms 55132 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 41564 KB Output is correct
2 Correct 8 ms 41676 KB Output is correct
3 Correct 8 ms 41564 KB Output is correct
4 Correct 8 ms 41564 KB Output is correct
5 Correct 8 ms 41560 KB Output is correct
6 Correct 8 ms 41564 KB Output is correct
7 Correct 8 ms 41688 KB Output is correct
8 Correct 8 ms 41564 KB Output is correct
9 Correct 9 ms 43636 KB Output is correct
10 Correct 8 ms 43868 KB Output is correct
11 Correct 9 ms 43656 KB Output is correct
12 Correct 9 ms 43612 KB Output is correct
13 Correct 9 ms 43612 KB Output is correct
14 Correct 13 ms 54876 KB Output is correct
15 Correct 12 ms 55132 KB Output is correct
16 Correct 13 ms 54620 KB Output is correct
17 Correct 12 ms 55132 KB Output is correct
18 Correct 13 ms 55128 KB Output is correct
19 Correct 11 ms 54108 KB Output is correct
20 Correct 12 ms 56712 KB Output is correct
21 Correct 16 ms 55132 KB Output is correct
22 Correct 12 ms 54928 KB Output is correct
23 Correct 13 ms 54876 KB Output is correct
24 Correct 131 ms 133360 KB Output is correct
25 Correct 162 ms 136124 KB Output is correct
26 Correct 67 ms 115192 KB Output is correct
27 Correct 139 ms 158212 KB Output is correct
28 Correct 132 ms 130048 KB Output is correct
29 Correct 121 ms 130900 KB Output is correct
30 Correct 115 ms 121424 KB Output is correct
31 Correct 13 ms 55800 KB Output is correct
32 Correct 165 ms 139604 KB Output is correct
33 Correct 8 ms 41560 KB Output is correct
34 Correct 9 ms 43612 KB Output is correct
35 Correct 121 ms 117840 KB Output is correct
36 Correct 10 ms 41820 KB Output is correct
37 Correct 13 ms 55304 KB Output is correct
38 Correct 111 ms 136272 KB Output is correct
39 Correct 76 ms 111444 KB Output is correct