Submission #465781

#	Time	Username	Problem	Language	Result	Execution time	Memory
465781		AnasBenMoussa	Portals (BOI14_portals)	C++14	0 / 100	4 ms	6092 KiB

portals

//keep it up
#include <bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
typedef long long ll;
typedef pair<ll,ll> pll;
typedef map<ll, ll> mll;
typedef vector<ll> vll;
typedef vector<pll> vpll;
typedef set<ll> sll;
template <typename T>
using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
//ordered_set<int>  s;
	//s.insert(1); s.insert(3);
	//cout << s.order_of_key(2) << endl; // the number of elements in the s less than 2
	//cout << *s.find_by_order(0) << endl; // print the 0-th smallest number in s(0-based)
#define all(x) begin(x), end(x)
#define pb push_back
#define doub(k) printf("%.5lf\n", k) // setprecision(5)
//auto r = equal_range(array, array+n, x);
//cout << r.second-r.first << "\n";
#define lowb(a, x) ( lower_bound((a).begin(), (a).end(), (x)) - (a).begin())//returns the index first element not less than x;
#define uppb(a, x) ( upper_bound((a).begin(), (a).end(), (x)) - (a).begin())//returns the index first element greater than x;
#define sum(a)     ( accumulate ((a).begin(), (a).end(), 0ll))
#define mine(a)    (*min_element((a).begin(), (a).end()))
#define maxe(a)    (*max_element((a).begin(), (a).end()))
#define mini(a)    ( min_element((a).begin(), (a).end()) - (a).begin())
#define maxi(a)    ( max_element((a).begin(), (a).end()) - (a).begin())
#define ms(AR,x)                memset(AR,x,sizeof AR);
ll gcd(ll a, ll b) {return b == 0 ? a : gcd(b, a % b);}
ll lcm(ll a , ll b){ return (a * b) / gcd(a , b);}
const int nx[4] = {0, 0, 1, -1}, ny[4] = {1, -1, 0, 0};
const int dr[8] = {1,1,0,-1,-1,-1, 0, 1}, dc[8] = {0,1,1, 1, 0,-1,-1,-1};


 void yes(){
    cout<<"YES\n";
}
void no(){
    cout<<"NO\n";
}


int cyt;int cye;
char grid[1000][1000];pll star,en;int vis[1000][1000];
int dis[10000][10000];
set<pair<int,int>>adj[100][1000];int x,y;
void  solve(int n ,int j){

        for(int i=0;i<=100;i++){
            if(grid[n][j-i]!='#'&&grid[n][j-i-1]=='#'){
                if(grid[n][j-i]=='#'){
                    continue;
                }
                 if(n<=0||j-i<=0||n>x||j-i>y){
                    continue;
                }
                adj[n][j-i].insert({n,j});
                adj[n][j].insert({n,j-i});
                break;
            }
        }

        for(int i=0;i<=1000;i++){
            if(grid[n+i][j]!='#'&&grid[n+i+1][j]=='#'){
                    if(grid[n+i][j]=='#'){
                    continue;
                }
                 if(n+i<=0||j<=0||n+i>x||j>y){
                    continue;
                }
                adj[n+i][j].insert({n,j});
                adj[n][j].insert({n+i,j});
                break;

        }

        for(int i=0;i<=10000;i++){
                if(grid[n-i][j]=='#'){
                    continue;
                }
            if(grid[n-i][j]!='#'&&grid[n-i-1][j]=='#'){
                if(n-i<=0||j<=0||n-i>x||j>y){
                    continue;
                }
                 adj[n-i][j].insert({n,j});
                adj[n][j].insert({n-i,j});
                break;
            }
        }
          for(int i=0;i<=10000;i++){
              if(grid[n][j+i]=='#'){
                    continue;
                }
            if(grid[n][j+i]!='#'&&grid[n][j+i+1]=='#'){
                 if(n<=0||j+i<=0||n>x||j+i>y){
                    continue;
                }

                  adj[n][j+i].insert({n,j});
                adj[n][j].insert({n,j+i});
                break;
            }
        }
    for(int r=0;r<4;r++){
        if(n+nx[r]<=0||n+nx[r]>x||j+ny[r]<=0||j+ny[r]>y){
            continue;
        }
        if(grid[n+nx[r]][j+ny[r]]=='#'){
            continue;
        }
       adj[n][j].insert({n+nx[r],j+ny[r]});
       adj[n+nx[r]][j+ny[r]].insert({n,j});


}
}}
void bfs(int t,int tt){
    queue<pair<int,int>>q;
    q.push({t,tt});
    dis[t][tt]=0;
    while(!q.empty()){

        int  r=q.front().first;
        int c=q.front().second;
    //cout<<r<<" "<<c<<endl;
      //  cout<<dis[r][c];
        q.pop();

        for(auto u:adj[r][c]){
            if(vis[u.first][u.second]){
                continue;
            }
            vis[u.first][u.second]=1;
            dis[u.first][u.second]=dis[r][c]+1;
            q.push({u.first,u.second});
        }
    }
}
    int32_t main()
{
    ios_base::sync_with_stdio(false);cin.tie(NULL);
    cin>>x;
    cin>>y;
    memset(grid,'#',sizeof(grid));
    for(int i=1;i<=x;i++){
        for(int j=1;j<=y;j++){
            char t;cin>>t;
            if(t=='S'){
                star={i,j};
            }
            if(t=='C'){
                en={i,j};
            }
            grid[i][j]=t;
        }
    }
    for(int i=1;i<=x;i++){
        for(int j=1;j<=y;j++){
            if(grid[i][j]=='#'){
                continue;
            }
            solve(i,j);
        }
    }
    /*for(int i=1;i<=x;i++){
        for(int j=1;j<=y;j++){
            cout<<i<<" "<<j<<"<<  ";
            for(auto u:adj[i][j]){
                cout<<u.first<<" "<<u.second<<"[";
            }
            cout<<endl;
        }
    }*/

    bfs(star.first,star.second);
   // for(int i=1;i<=x;i++){
     //   for(int j=1;j<=y;j++){
      //      cout<<i<<" "<<j<<"    "<<dis[i][j]<<endl;
       // }
    //}
    cout<<dis[en.first][en.second];
    return 0;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 19
• Subtask 5: 0 / 30