제출 #581294

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
581294		qwerasdfzxcl	로봇 (APIO13_robots)	C++14	60 / 100	1565 ms	96828 KiB

robots

#include <bits/stdc++.h>
 
typedef long long ll;
using namespace std;
struct Vertex{
    int x, y, d;
    Vertex(){}
    Vertex(int _x, int _y, int _d): x(_x), y(_y), d(_d) {}
    bool operator<(const Vertex &V) const{
        return d > V.d;
    }
}to[505][505][4];
char a[505][505];
bool visited[505][505][4];
int dx[4] = {-1, 0, 1, 0}, dy[4] = {0, 1, 0, -1}, n, w, h;
 
int dist[9][9][505][505];
 
void dfs(int x, int y, int d){
    visited[x][y][d] = 1;
    int nx, ny, nd = d;
    if (a[x][y]=='A') nd = (d+3)%4;
    if (a[x][y]=='C') nd = (d+1)%4;
    nx = x + dx[nd], ny = y + dy[nd];
 
    if (a[nx][ny]=='x') to[x][y][d] = Vertex(x, y, d);
    else if (visited[nx][ny][nd]) to[x][y][d] = to[nx][ny][nd];
    else{
        dfs(nx, ny, nd);
        to[x][y][d] = to[nx][ny][nd];
    }
}
 
void init(){
    for (int i=0;i<=h+1;i++) fill(a[i], a[i]+w+2, 'x');
    for (int i=1;i<=h;i++){
        scanf("%s", a[i]+1);
        a[i][w+1] = 'x';
    }
 
    for (int i=1;i<=h;i++){
        for (int j=1;j<=w;j++){
            for (int d=0;d<4;d++) if (!visited[i][j][d]) dfs(i, j, d);
        }
    }
 
    for (int t=0;t<81;t++){
        for (int i=1;i<=h;i++){
            for (int j=1;j<=w;j++){
                dist[t/9][t%9][i][j] = 1e9;
            }
        }
    }
 
 
    //printf("%d %d %d\n", to[1][1][0].x, to[1][1][0].y, to[1][1][0].d);
}
 
 
 
void bfs(int l, int r){
    //printf(" %d %d\n", l, r);
 
    priority_queue<Vertex> pq;
 
    for (int i=1;i<=h;i++){
        for (int j=1;j<=w;j++){
            if (l==r&& a[i][j]=='1'+l) dist[l][r][i][j] = 0;
            if (dist[l][r][i][j]<1e9) pq.emplace(i, j, dist[l][r][i][j]);
        }
    }
 
 
    while(!pq.empty()){
        auto [x, y, dd] = pq.top(); pq.pop();
        if (dd!=dist[l][r][x][y]) continue;
        //if (t==21 && dist[l][r][x][y]==2) printf("YES %d %d\n", x, y);
        for (int i=0;i<l;i++){
            dist[i][r][x][y] = min(dist[i][r][x][y], dist[i][l-1][x][y] + dist[l][r][x][y]);
        }
        for (int i=r+1;i<n;i++){
            dist[l][i][x][y] = min(dist[l][i][x][y], dist[l][r][x][y] + dist[r+1][i][x][y]);
        }
 
        for (int d=0;d<4;d++){
            int nx = to[x][y][d].x, ny = to[x][y][d].y;
            if (!nx) continue;
            if (dist[l][r][nx][ny] <= dist[l][r][x][y] + 1) continue;
 
            dist[l][r][nx][ny] = dist[l][r][x][y] + 1;
            pq.emplace(nx, ny, dist[l][r][nx][ny]);
 
        }
    }
}
 
int main(){
 
    scanf("%d %d %d", &n, &w, &h);
    init();
 
    for (int d=0;d<n;d++){
        for (int i=0;i<n-d;i++){
            int j = i+d;
            bfs(i, j);
        }
    }
    int ans = 1e9;
    for (int i=1;i<=h;i++){
        for (int j=1;j<=w;j++){
            //if (dist[0][i][j]==0 && dist[1][i][j]==0) printf("%d %d\n", i, j);
            //if (dist[3][3][i][j]!=1e9)printf("%d ", dist[3][3][i][j]);
            //else printf("x ");
            ans = min(ans, dist[0][n-1][i][j]);
        }
        //printf("\n");
    }
    printf("%d\n", ans==1e9?-1:ans);
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

robots.cpp: In function 'void bfs(int, int)':
robots.cpp:75:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   75 |         auto [x, y, dd] = pq.top(); pq.pop();
      |              ^
robots.cpp: In function 'void init()':
robots.cpp:37:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |         scanf("%s", a[i]+1);
      |         ~~~~~^~~~~~~~~~~~~~
robots.cpp: In function 'int main()':
robots.cpp:99:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   99 |     scanf("%d %d %d", &n, &w, &h);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 30 / 30
• Subtask 4: 0 / 40