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답안 #249854

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
249854 2020-07-16T06:01:18 Z DrumpfTheGodEmperor 로봇 (APIO13_robots) C++14
30 / 100
 308 ms 51004 KB 
#include <bits/stdc++.h>
#define bp __builtin_popcountll
#define pb push_back
#define in(s) freopen(s, "r", stdin);
#define out(s) freopen(s, "w", stdout);
#define inout(s, end1, end2) freopen((string(s) + "." + end1).c_str(), "r", stdin),\
		freopen((string(s) + "." + end2).c_str(), "w", stdout);
#define fi first
#define se second
#define bw(i, r, l) for (int i = r - 1; i >= l; i--)
#define fw(i, l, r) for (int i = l; i < r; i++)
#define fa(i, x) for (auto i: x)
using namespace std;
const int mod = 1e9 + 7, inf = 1061109567;
const long long infll = 4557430888798830399;
const int N = 505, N2 = N * N;
typedef pair<int, int> ii;
int n, m, robots, dx[] = {-1, 0, 1, 0}, dy[] = {0, 1, 0, -1}; //x is the row, y is the column
char dName[] = {'N', 'E', 'S', 'W'};
char a[N][N];
ii enPos[N][N][4];
int getClockwise(int dir) {
	return (dir + 1) % 4;
}
int getAnti(int dir) {
	return (dir + 3) % 4;
}
bool check(int x, int y) {
	if (x >= 0 && x < n && y >= 0 && y < m && a[x][y] != 'x') return true;
	return false;
}
ii getEnPos(int x, int y, int dir) {
	if (enPos[x][y][dir] != ii(-1, -1)) return enPos[x][y][dir];
	int ogDir = dir;
	
	if (a[x][y] == 'A') dir = getAnti(dir);
	if (a[x][y] == 'C') dir = getClockwise(dir);
	
	if (!check(x + dx[dir], y + dy[dir])) return enPos[x][y][ogDir] = ii(x, y);
	else return enPos[x][y][ogDir] = getEnPos(x + dx[dir], y + dy[dir], dir);
}
int getID(int x, int y) {
	return x * m + y;
}
int getID(ii a) {
	return a.fi * m + a.se;
}
vector<int> g[N2];
int dp[N2][10][10], cnt[N2 * 10], per[N2];
void solve(int l, int r) {
	fw (i, 0, n * m * (r - l + 1) + 1) cnt[i] = 0;
	fw (i, 0, n * m) {
		fw (mid, l, r) dp[i][l][r] = min(dp[i][l][r], dp[i][l][mid] + dp[i][mid + 1][r]);
		if (dp[i][l][r] != inf) cnt[dp[i][l][r]]++;
	}
	//Use counting sort to sort the dp(i, l, r), then pointer.
	fw (i, 1, n * m * (r - l + 1) + 1) cnt[i] += cnt[i - 1];
	int tot = 0;
	fw (i, 0, n * m) if (dp[i][l][r] != inf) {
		tot++;
		per[--cnt[dp[i][l][r]]] = i;
	}
	//Now do some shitty ass BFS.
	queue<int> q[2];
	//dp(i, l, r) <= n * m * (r - l + 1)
	int ptr = 0;
	fw (dist, 0, n * m * (r - l + 1) + 1) {
		while (ptr < tot && dp[per[ptr]][l][r] == dist) {
			q[dist & 1].push(per[ptr]);
			ptr++;
		}
		while (!q[dist & 1].empty()) {
			int u = q[dist & 1].front(); q[dist & 1].pop();
			fa (v, g[u]) if (dp[u][l][r] + 1 < dp[v][l][r]) {
				dp[v][l][r] = dp[u][l][r] + 1;
				q[(dist + 1) & 1].push(v);
			}
		}
	}
//	fw (i, 0, n * m) if (dp[i][l][r] != inf) {
//		cout << "dp[" << i << "][" << l << "][" << r << "] = " << dp[i][l][r] << "\n";
//	}
}
signed main() {
	#ifdef BLU
	in("blu.inp");
	#endif
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
	cin >> robots >> m >> n;
	fw (i, 0, n) fw (j, 0, m) {
		cin >> a[i][j];
		fw (k, 0, 4) enPos[i][j][k] = ii(-1, -1);
	}
	
	fw (i, 0, n) fw (j, 0, m) {
		fw (dir, 0, 4) {
			ii enPos = getEnPos(i, j, dir);
			g[getID(i, j)].pb(getID(enPos));
		}
	}
	
	fw (i, 0, n * m) fw (l, 0, robots) fw (r, l, robots) dp[i][l][r] = inf;
	fw (i, 0, n) fw (j, 0, m) {
		if (a[i][j] >= '1' && a[i][j] <= '9') {
			int num = a[i][j] - '1';
//			cout << "num = " << num << " getID = " << getID(i, j) << "\n";
			dp[getID(i, j)][num][num] = 0;
		}
	} 
	
	fw (len, 1, robots + 1) {
		fw (l, 0, robots) {
			int r = l + len - 1;
			if (r >= robots) break;
			solve(l, r);
		}
	}
	int ans = inf;
	fw (i, 0, n * m) ans = min(ans, dp[i][0][robots - 1]);
	if (ans != inf) cout << ans; 
	else cout << "-1";
	return 0;
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 6400 KB Output is correct
2 Correct 5 ms 6400 KB Output is correct
3 Correct 4 ms 6400 KB Output is correct
4 Correct 4 ms 6528 KB Output is correct
5 Correct 4 ms 6528 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 6400 KB Output is correct
2 Correct 5 ms 6400 KB Output is correct
3 Correct 4 ms 6400 KB Output is correct
4 Correct 4 ms 6528 KB Output is correct
5 Correct 4 ms 6528 KB Output is correct
6 Correct 4 ms 6400 KB Output is correct
7 Correct 4 ms 6272 KB Output is correct
8 Correct 4 ms 6400 KB Output is correct
9 Correct 5 ms 6400 KB Output is correct
10 Correct 4 ms 6400 KB Output is correct

Subtask #3
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 6400 KB Output is correct
2 Correct 5 ms 6400 KB Output is correct
3 Correct 4 ms 6400 KB Output is correct
4 Correct 4 ms 6528 KB Output is correct
5 Correct 4 ms 6528 KB Output is correct
6 Correct 4 ms 6400 KB Output is correct
7 Correct 4 ms 6272 KB Output is correct
8 Correct 4 ms 6400 KB Output is correct
9 Correct 5 ms 6400 KB Output is correct
10 Correct 4 ms 6400 KB Output is correct
11 Correct 290 ms 50936 KB Output is correct
12 Correct 44 ms 48120 KB Output is correct
13 Correct 170 ms 51004 KB Output is correct
14 Incorrect 308 ms 50936 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #4
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 6400 KB Output is correct
2 Correct 5 ms 6400 KB Output is correct
3 Correct 4 ms 6400 KB Output is correct
4 Correct 4 ms 6528 KB Output is correct
5 Correct 4 ms 6528 KB Output is correct
6 Correct 4 ms 6400 KB Output is correct
7 Correct 4 ms 6272 KB Output is correct
8 Correct 4 ms 6400 KB Output is correct
9 Correct 5 ms 6400 KB Output is correct
10 Correct 4 ms 6400 KB Output is correct
11 Correct 290 ms 50936 KB Output is correct
12 Correct 44 ms 48120 KB Output is correct
13 Correct 170 ms 51004 KB Output is correct
14 Incorrect 308 ms 50936 KB Output isn't correct
15 Halted 0 ms 0 KB -