oj.uz

Submission #552394

# Submission time Handle Problem Language Result Execution time Memory
552394 2022-04-23T05:40:21 Z QwertyPi Robots (APIO13_robots) C++14
30 / 100
 798 ms 43120 KB 
#include <bits/stdc++.h>
#define fi first
#define se second
#define pb push_back
using namespace std;
typedef pair<int, int> pii;
const int MAXN = 500, MAXM = 500, MAXD = 9;
const int INF = (1 << 25);
char board[MAXN][MAXM];
int dp[MAXN][MAXM][MAXD][MAXD];
int dd[MAXN][MAXM];
pii f[MAXN][MAXM][4];
pii pos[MAXD];
 
int dx[4] = {1, 0, -1, 0};
int dy[4] = {0, -1, 0, 1};
 
int d, n, m;
bool in(int i, int j){
	return 0 <= i && i < n && 0 <= j && j < m && board[i][j] != 'x';
}
 
bool vis[MAXN][MAXM][4];
inline pii dfs(int i, int j, int dir){
	if(vis[i][j][dir]) return {-1, -1};
	if(f[i][j][dir].fi != -2) return f[i][j][dir];
	vis[i][j][dir] = true;
	if(!in(i + dx[dir], j + dy[dir])){
		f[i][j][dir] = {i, j};
		vis[i][j][dir] = false;
		return {i, j};
	}
	f[i][j][dir] = dfs(i + dx[dir], j + dy[dir], (dir + dd[i + dx[dir]][j + dy[dir]] + 4) % 4);
	vis[i][j][dir] = false;
	return f[i][j][dir];
}
 
struct CMP{
	bool operator()(pair<pii, pii> a, pair<pii, pii> b){
		return a.fi.fi > b.fi.fi;
	}
};
 
int main(){
	cin >> d >> m >> n;
	for(int i = 0; i < n; i++){
		for(int j = 0; j < m; j++){
			cin >> board[i][j];
			if(board[i][j] >= '0' && board[i][j] <= '9') pos[board[i][j] - '1'] = {i, j}, board[i][j] = '.';
			if(board[i][j] == 'C') dd[i][j] = 1;
			if(board[i][j] == 'A') dd[i][j] = -1;
		}
	}
	for(int i = 0; i < n; i++){
		for(int j = 0; j < m; j++){
			for(int dir = 0; dir < 4; dir++){
				f[i][j][dir].fi = -2;
			}
		}
	}
	for(int i = 0; i < n; i++){
		for(int j = 0; j < m; j++){
			for(int dir = 0; dir < 4; dir++){
				if(f[i][j][dir].fi == -2) dfs(i, j, dir);
			}
		}
	}
//	for(int i = 0; i < n; i++){
//		for(int j = 0; j < m; j++){
//			for(int k = 0; k < 4; k++){
//				cout << i << ' ' << j << ' ' << k << ' ' << f[i][j][k].fi << ' ' << f[i][j][k].se << endl;
//			}
//		}
//	}
	// cout << d << ' ' << n << ' ' << m << endl;
	for(int i = 0; i < n; i++){
		for(int j = 0; j < m; j++){
			for(int d1 = 0; d1 < d; d1++){
				for(int d2 = d1; d2 < d; d2++){
					dp[i][j][d1][d2] = INF;
				}
			}
		}
	}
	// cout << "End" << endl;
	priority_queue<pair<pii, pii>, vector<pair<pii, pii>>, CMP> q;
	for(int i = 0; i < d; i++){
		for(int j = i; j >= 1; j--){
			q.push({{dp[pos[i].fi][pos[i].se][j - 1][i - 1], j - 1}, pos[i]});
			dp[pos[i].fi][pos[i].se][j - 1][i] = dp[pos[i].fi][pos[i].se][j - 1][i - 1];
		}
		q.push({{0, i}, pos[i]});
		dp[pos[i].fi][pos[i].se][i][i] = 0;
		while(!q.empty()){
			pair<pii, pii> v = q.top(); q.pop();
			int cost = v.fi.fi, nd = v.fi.se, x = v.se.fi, y = v.se.se;
			for(int dir = 0; dir < 4; dir++){
				int nx = f[x][y][dir].fi, ny = f[x][y][dir].se;
				if(nx == x && ny == y) continue;
				int co = cost + 1;
				if(co >= dp[nx][ny][nd][i]) continue;
				dp[nx][ny][nd][i] = co;
				q.push({{co, nd}, {nx, ny}});
				if(nd == i){
					for(int j = nd; j >= 1; j--){
						if(co + dp[nx][ny][j - 1][nd - 1] >= dp[nx][ny][j - 1][i]) continue;
						dp[nx][ny][j - 1][i] = co + dp[nx][ny][j - 1][nd - 1];
						q.push({{co + dp[nx][ny][j - 1][nd - 1], j - 1}, {nx, ny}});
					}
				}
			}
		}
		for(int x = 0; x < n; x++){
			for(int y = 0; y < m; y++){
				for(int dl = 0; dl < i; dl++){
					for(int dm = dl; dm < i; dm++){
						dp[x][y][dl][i] = min(dp[x][y][dl][i], dp[x][y][dl][dm] + dp[x][y][dm + 1][i]);
					}
				}
			}
		}
	}
	
	int ans = INF;
//	for(int d1 = 0; d1 < d; d1++){
//		for(int d2 = d1; d2 < d; d2++){
//			cout << "d " << d1 << ' ' << d2 << endl;
//			for(int i = 0; i < n; i++){
//				for(int j = 0; j < m; j++){
//					cout << (dp[i][j][d1][d2] >= INF ? -1 : dp[i][j][d1][d2]) << ' ';
//				}
//				cout << endl;
//			}
//		}
//	}
	for(int i = 0; i < n; i++){
		for(int j = 0; j < m; j++){
			ans = min(ans, dp[i][j][0][d - 1]);
		}
	}
	cout << (ans >= INF ? -1 : ans) << endl;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 243 ms 36268 KB Output is correct
12 Correct 32 ms 33964 KB Output is correct
13 Correct 49 ms 34772 KB Output is correct
14 Incorrect 798 ms 43120 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 243 ms 36268 KB Output is correct
12 Correct 32 ms 33964 KB Output is correct
13 Correct 49 ms 34772 KB Output is correct
14 Incorrect 798 ms 43120 KB Output isn't correct
15 Halted 0 ms 0 KB -