oj.uz

Submission #948621

# Submission time Handle Problem Language Result Execution time Memory
948621 2024-03-18T08:55:54 Z Darren0724 Portals (BOI14_portals) C++17
100 / 100
 512 ms 81396 KB 
#include <bits/stdc++.h>
using namespace std;
#define LCBorz ios_base::sync_with_stdio(false); cin.tie(0);
//#define int long long
#define all(x) x.begin(), x.end()
#define endl '\n'
const int N=1005;
const int INF=1e9;
 
int32_t main() {
    LCBorz;
    int n,m;cin>>n>>m;
    vector<vector<char>> v(n+2,vector<char>(m+2,'#'));
    auto id=[&](int a,int b){
        return a*N+b;
    };
    auto valid=[&](int a,int b){
        return v[a][b]!='#';
    };
    auto rev=[&](int id){
        return make_pair(id/N,id%N);
    };
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            cin>>v[i][j];
        }
    }
    vector<int> adj[N*N];
    for(int i=1;i<=n;i++){
        int last=0;
        for(int j=1;j<=m;j++){
            if(!valid(i,j)){
                last=j;
                continue;
            }
            adj[id(i,j)].push_back(id(i,last+1));
        }
        last=m+1;
        for(int j=m;j>=1;j--){
            if(!valid(i,j)){
                last=j;
                continue;
            }
            adj[id(i,j)].push_back(id(i,last-1));
        }
    }
    for(int i=1;i<=m;i++){
        int last=0;
        for(int j=1;j<=n;j++){
            if(!valid(j,i)){
                last=j;
                continue;
            }
            adj[id(j,i)].push_back(id(last+1,i));
        }
        last=n+1;
        for(int j=n;j>=1;j--){
            if(!valid(j,i)){
                last=j;
                continue;
            }
            adj[id(j,i)].push_back(id(last-1,i));
        }
    }
    vector<int> dx={0,0,-1,1},dy={1,-1,0,0};
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            if(!valid(i,j))continue;
            for(int k=0;k<4;k++){
                int a=i+dx[k],b=j+dy[k];
                if(!valid(a,b))continue;
                adj[id(i,j)].push_back(id(a,b));
            }
        }
    }
    queue<int> q;
    vector<int> dis(N*N,INF);
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            if(v[i][j-1]=='#'||v[i][j+1]=='#'||v[i-1][j]=='#'||v[i+1][j]=='#'){
                q.push(id(i,j));
                dis[id(i,j)]=0;
            }
        }
    }
    while(q.size()){
        int p=q.front();
        q.pop();
        for(int j:adj[p]){
            if(dis[j]==INF){
                dis[j]=dis[p]+1;
                q.push(j);
            }
        }
    }
    priority_queue<pair<int,int>> pq;
    vector dis1(N*N,INF);
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            if(v[i][j]=='S'){
                dis1[id(i,j)]=0;
                pq.push({0,id(i,j)});
            }
        }
    }
    while(pq.size()){
        auto [dis2,t]=pq.top();
        pq.pop();
        dis2=-dis2;
        if(dis2!=dis1[t])continue;
        for(int j:adj[t]){
            int cost=dis1[t];
            if(abs(j-t)==N||abs(j-t)==1)cost+=1;
            else cost+=dis[t]+1;
            if(dis1[j]>cost){
                dis1[j]=cost;
                pq.push({-dis1[j],j});
            }
        }
    }
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            if(v[i][j]=='C'){
                cout<<dis1[id(i,j)]<<endl;
            }
        }
    }
    
 
    
    return 0;
}

Compilation message

portals.cpp: In function 'int32_t main()':
portals.cpp:20:10: warning: variable 'rev' set but not used [-Wunused-but-set-variable]
   20 |     auto rev=[&](int id){
      |          ^~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 32036 KB Output is correct
2 Correct 24 ms 32088 KB Output is correct
3 Correct 19 ms 31836 KB Output is correct
4 Correct 18 ms 31836 KB Output is correct
5 Correct 18 ms 31832 KB Output is correct
6 Correct 19 ms 31824 KB Output is correct
7 Correct 24 ms 31984 KB Output is correct
8 Correct 19 ms 32092 KB Output is correct
9 Correct 18 ms 31864 KB Output is correct
10 Correct 21 ms 31840 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 31996 KB Output is correct
2 Correct 20 ms 31840 KB Output is correct
3 Correct 18 ms 32092 KB Output is correct
4 Correct 20 ms 32088 KB Output is correct
5 Correct 19 ms 32092 KB Output is correct
6 Correct 20 ms 31984 KB Output is correct
7 Correct 20 ms 32092 KB Output is correct
8 Correct 18 ms 32092 KB Output is correct
9 Correct 19 ms 32092 KB Output is correct
10 Correct 19 ms 32092 KB Output is correct
11 Correct 19 ms 32088 KB Output is correct
12 Correct 19 ms 32088 KB Output is correct
13 Correct 19 ms 32092 KB Output is correct
14 Correct 19 ms 32024 KB Output is correct
15 Correct 19 ms 32092 KB Output is correct
16 Correct 18 ms 32096 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 31832 KB Output is correct
2 Correct 19 ms 32088 KB Output is correct
3 Correct 18 ms 32088 KB Output is correct
4 Correct 24 ms 32100 KB Output is correct
5 Correct 27 ms 33372 KB Output is correct
6 Correct 28 ms 33400 KB Output is correct
7 Correct 30 ms 33540 KB Output is correct
8 Correct 34 ms 33372 KB Output is correct

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 31836 KB Output is correct
2 Correct 18 ms 32092 KB Output is correct
3 Correct 19 ms 32092 KB Output is correct
4 Correct 22 ms 32092 KB Output is correct
5 Correct 18 ms 32044 KB Output is correct
6 Correct 19 ms 31836 KB Output is correct
7 Correct 24 ms 32092 KB Output is correct
8 Correct 19 ms 32092 KB Output is correct
9 Correct 19 ms 32092 KB Output is correct
10 Correct 19 ms 32092 KB Output is correct
11 Correct 19 ms 32092 KB Output is correct
12 Correct 20 ms 31944 KB Output is correct
13 Correct 19 ms 32092 KB Output is correct
14 Correct 27 ms 33372 KB Output is correct
15 Correct 27 ms 33364 KB Output is correct
16 Correct 29 ms 33432 KB Output is correct
17 Correct 27 ms 33372 KB Output is correct
18 Correct 29 ms 33620 KB Output is correct
19 Correct 35 ms 33880 KB Output is correct
20 Correct 39 ms 33936 KB Output is correct
21 Correct 26 ms 33372 KB Output is correct
22 Correct 28 ms 33368 KB Output is correct
23 Correct 28 ms 33372 KB Output is correct
24 Correct 29 ms 33884 KB Output is correct
25 Correct 19 ms 32088 KB Output is correct
26 Correct 19 ms 32092 KB Output is correct
27 Correct 23 ms 31848 KB Output is correct
28 Correct 32 ms 33372 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 32076 KB Output is correct
2 Correct 22 ms 32092 KB Output is correct
3 Correct 19 ms 32088 KB Output is correct
4 Correct 18 ms 31836 KB Output is correct
5 Correct 25 ms 32088 KB Output is correct
6 Correct 18 ms 31924 KB Output is correct
7 Correct 19 ms 32088 KB Output is correct
8 Correct 26 ms 32092 KB Output is correct
9 Correct 20 ms 32180 KB Output is correct
10 Correct 19 ms 32200 KB Output is correct
11 Correct 23 ms 32116 KB Output is correct
12 Correct 19 ms 32088 KB Output is correct
13 Correct 19 ms 32092 KB Output is correct
14 Correct 33 ms 33372 KB Output is correct
15 Correct 27 ms 33372 KB Output is correct
16 Correct 28 ms 33360 KB Output is correct
17 Correct 27 ms 33372 KB Output is correct
18 Correct 29 ms 33616 KB Output is correct
19 Correct 35 ms 33884 KB Output is correct
20 Correct 33 ms 33872 KB Output is correct
21 Correct 35 ms 33324 KB Output is correct
22 Correct 29 ms 33360 KB Output is correct
23 Correct 28 ms 33372 KB Output is correct
24 Correct 337 ms 68020 KB Output is correct
25 Correct 498 ms 81336 KB Output is correct
26 Correct 512 ms 81396 KB Output is correct
27 Correct 463 ms 80988 KB Output is correct
28 Correct 295 ms 66768 KB Output is correct
29 Correct 321 ms 67152 KB Output is correct
30 Correct 393 ms 67860 KB Output is correct
31 Correct 31 ms 33872 KB Output is correct
32 Correct 461 ms 80940 KB Output is correct
33 Correct 23 ms 31828 KB Output is correct
34 Correct 20 ms 32092 KB Output is correct
35 Correct 438 ms 71224 KB Output is correct
36 Correct 18 ms 32088 KB Output is correct
37 Correct 24 ms 33368 KB Output is correct
38 Correct 272 ms 68044 KB Output is correct
39 Correct 223 ms 57684 KB Output is correct