oj.uz

Submission #581458

# Submission time Handle Problem Language Result Execution time Memory
581458 2022-06-22T16:36:57 Z ansol4328 Robots (APIO13_robots) C++14
0 / 100
 56 ms 100160 KB 
#include<bits/stdc++.h>
#define fi first
#define se second
#define pb push_back

using namespace std;
typedef long long ll;
typedef pair<int,int> P;

struct A{
    int y, x, dir;
};

int n, w, h;
string xy[505];
P nxt[505][505][4];
int dy[4]={-1,0,1,0};
int dx[4]={0,1,0,-1};
int D[10][10][505][505];
const int INF=1e9;

void fastio(){
    ios_base::sync_with_stdio(false); cin.tie(NULL);
}

void get_nxt()
{
    queue<A> Q;
    for(int i=0 ; i<h ; i++){
        for(int j=0 ; j<w ; j++){
            for(int k=0 ; k<4 ; k++){
                nxt[i][j][k]=P(-1,-1);
                int ny=i+dy[k], nx=j+dx[k];
                if(ny<0 || ny>=h || nx<0 || nx>=w || xy[ny][nx]=='x'){
                    nxt[i][j][k]=P(i,j);
                    Q.push({i,j,k});
                }
            }
        }
    }
    while(!Q.empty()){
        A v=Q.front(); Q.pop();
        P pr=nxt[v.y][v.x][v.dir];
        if(xy[v.y][v.x]=='A') v.dir=(v.dir+1)%4;
        else if(xy[v.y][v.x]=='C') v.dir=(v.dir+3)%4;
        v.dir=(v.dir+2)%4;
        v.y+=dy[v.dir], v.x+=dx[v.dir];
        if(v.y<0 || v.y>=h || v.x<0 || v.x>=w || xy[v.y][v.x]=='x') continue;
        v.dir=(v.dir+2)%4;
        nxt[v.y][v.x][v.dir]=pr; Q.push(v);
    }
}

void prop(int s, int e)
{
    map<int,queue<P>> Q;
    vector<vector<bool>> chk(h,vector<bool>(w));
    int mn=INF, mx=0;
    for(int i=0 ; i<h ; i++){
        for(int j=0 ; j<w ; j++){
            if(D[s][e][i][j]!=-1){
                Q[D[s][e][i][j]].push(P(i,j));
                mn=min(mn,D[s][e][i][j]);
                mx=max(mx,D[s][e][i][j]);
            }
        }
    }
    while(mn<=mx){
        queue<P> &cur=Q[mn];
        if(cur.empty()){
            mn++; continue;
        }
        P v=cur.front(); cur.pop();
        if(chk[v.fi][v.se]) continue;
        chk[v.fi][v.se]=true;
        for(int i=0 ; i<4 ; i++){
            if(nxt[v.fi][v.se][i]==P(-1,-1)) continue;
            P nv=nxt[v.fi][v.se][i];
            if(!chk[nv.fi][nv.se] && (D[s][e][nv.fi][nv.se]==-1 || D[s][e][nv.fi][nv.se]>D[s][e][v.fi][v.se]+1)){
                D[s][e][nv.fi][nv.se]=D[s][e][v.fi][v.se]+1;
                Q[D[s][e][nv.fi][nv.se]].push(nv);
                mx=max(mx,D[s][e][nv.fi][nv.se]);
            }
        }
    }
}

int main()
{
    fastio();
    cin >> n >> w >> h;
    for(int i=0 ; i<h ; i++) cin >> xy[i];
    get_nxt();
    memset(D,-1,sizeof(D));
    for(int i=0 ; i<h ; i++){
        for(int j=0 ; j<w ; j++){
            if(xy[i][j]>='1' && xy[i][j]<='9'){
                D[xy[i][j]-'0'][xy[i][j]-'0'][i][j]=0;
                prop(xy[i][j]-'0',xy[i][j]-'0');
            }
        }
    }
    for(int x=1 ; x<n ; x++){
        for(int i=1, j=1+x ; i+x<=n ; i++, j++){
            for(int c=i ; c<j ; c++){
                for(int y=0 ; y<h ; y++){
                    for(int x=0 ; x<w ; x++){
                        if(D[i][c][y][x]==-1 || D[c+1][j][y][x]==-1) continue;
                        if(D[i][j][y][x]==-1 || D[i][j][y][x]>D[i][c][y][x]+D[c+1][j][y][x]) D[i][j][y][x]=D[i][c][y][x]+D[c+1][j][y][x];
                    }
                }
            }
            prop(i,j);
/*            cout << "[ " << i << ' ' << j << " ]\n";
            for(int y=0 ; y<h ; y++){
                for(int x=0 ; x<w ; x++){
                    cout << D[i][j][y][x] << ' ';
                }
                cout << '\n';
            }*/
        }
    }
    int ans=-1;
    for(int i=0 ; i<h ; i++) for(int j=0 ; j<w ; j++) if(D[1][n][i][j]!=-1 && (ans==-1 || ans>D[1][n][i][j])) ans=D[1][n][i][j];
    cout << ans;
    return 0;
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 45 ms 100068 KB Output is correct
2 Correct 46 ms 100120 KB Output is correct
3 Correct 38 ms 100124 KB Output is correct
4 Correct 39 ms 100160 KB Output is correct
5 Incorrect 56 ms 100108 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 45 ms 100068 KB Output is correct
2 Correct 46 ms 100120 KB Output is correct
3 Correct 38 ms 100124 KB Output is correct
4 Correct 39 ms 100160 KB Output is correct
5 Incorrect 56 ms 100108 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 45 ms 100068 KB Output is correct
2 Correct 46 ms 100120 KB Output is correct
3 Correct 38 ms 100124 KB Output is correct
4 Correct 39 ms 100160 KB Output is correct
5 Incorrect 56 ms 100108 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 45 ms 100068 KB Output is correct
2 Correct 46 ms 100120 KB Output is correct
3 Correct 38 ms 100124 KB Output is correct
4 Correct 39 ms 100160 KB Output is correct
5 Incorrect 56 ms 100108 KB Output isn't correct
6 Halted 0 ms 0 KB -