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답안 #46075

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
46075 2018-04-17T05:14:16 Z RockyB 로봇 (APIO13_robots) C++11
30 / 100
 1500 ms 163840 KB 
/// In The Name Of God

#pragma GCC optimize("Ofast")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

#include <bits/stdc++.h>

#define f first
#define s second

#define pb emplace_back
#define pp pop_back
#define mp make_pair

#define sz(x) (int)x.size()
#define sqr(x) ((x) * 1ll * (x))
#define all(x) x.begin(), x.end()

#define Kazakhstan ios_base :: sync_with_stdio(0), cin.tie(0), cout.tie(0);

#define nl '\n'
#define ioi exit(0);

typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;

const int N = (int)500;
const int inf = (int)1e9 + 7;
const int mod = (int)1e9 + 7;
const ll linf = (ll)1e18 + 7;

const int dx[] = {-1, 0, 1, 0, 1, -1, -1, 1};
const int dy[] = {0, 1, 0, -1, 1, -1, 1, -1};

using namespace std;

int n, m, h;
char a[N][N];

int dp[N][N][55];
int id[10][10];

pair <int, int> res[N][N][4];
bool was[N][N][4];

struct node {
	int l, r, x, y;
	inline node() {}
	inline node(int l, int r, int x, int y) : l(l), r(r), x(x), y(y) {}
};

vector <node> q[N * N];

inline bool check(int x, int y) {
	return 0 <= x && x < n && 0 <= y && y < m && a[x][y] != 'x';
}
inline pair <int, int> go(int x, int y, int t) {
	if (a[x][y] == 'C') t = (t + 1) % 4;
	if (a[x][y] == 'A') t = (((t - 1) + 4) % 4);
	if (was[x][y][t]) return res[x][y][t];
	was[x][y][t] = 1;
	if (check(x + dx[t], y + dy[t])) return res[x][y][t] = go(x + dx[t], y + dy[t], t);
	return res[x][y][t] = {x, y};
}

int main() {
	#ifdef IOI2018
		freopen ("in.txt", "r", stdin);
	#endif
	Kazakhstan
	cin >> h >> m >> n;

	int tmr = 0;
	for (int i = 0; i <= h; ++i) {
		for (int j = i; j <= h; ++j) {
			id[i][j] = tmr++;
		}
	}

	memset(dp, 0x3f, sizeof(dp));
	memset(res, -1, sizeof(res));

	for (int i = 0; i < n; ++i) {
		cin >> a[i];
		for (int j = 0; j < m; ++j) {
			if (isdigit(a[i][j])) {
				int d = a[i][j] - '1';
				dp[i][j][id[d][d]] = 0;
				q[0].pb(node(d, d, i, j));
			}
		}
	}	
	for (int i = 0; i < n; ++i) {
		for (int j = 0; j < m; ++j) {
			if (check(i, j)) {
				for (int t = 0; t < 4; t++) go(i, j, t);
			}
		}
	}
	int to = n * m;
	for (int cur = 0; cur <= to; ++cur) {
		for (auto v : q[cur]) {
			if (v.l == 0 && v.r == h - 1) cout << cur, ioi

			for (int t = 0; t < 4; ++t) {
				pair <int, int> &to = res[v.x][v.y][t];
				if (to.f == -1) continue;


				int add = mp(v.x, v.y) != to;
				//if (mp(v.x, v.y) == to) assert(0);

				int &up1 = dp[to.f][to.s][id[v.l][v.r]];
				if (up1 > cur + add) {
					up1 = cur + add;
					q[up1].pb(node(v.l, v.r, to.f, to.s));
				}
				for (int i = v.r + 1; i < h; ++i) {
					int cost = cur + dp[to.f][to.s][id[v.r + 1][i]] + add;
					int &up2 = dp[to.f][to.s][id[v.l][i]];
					if (up2 > cost) {
						up2 = cost;
						q[up2].pb(node(v.l, i, to.f, to.s));
					}
				}
				for (int i = v.l - 1; i >= 0; --i) {
					int cost = cur + dp[to.f][to.s][id[i][v.l - 1]] + add;
					int &up3 = dp[to.f][to.s][id[i][v.r]];
					if (up3 > cost) {
						up3 = cost;
						q[up3].pb(node(i, v.r, to.f, to.s));
					}
				}
			}
		}
		if (sz(q[cur])) q[cur].clear();
	}
	cout << -1;
	ioi
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 49 ms 67832 KB Output is correct
2 Correct 49 ms 67944 KB Output is correct
3 Correct 51 ms 68000 KB Output is correct
4 Correct 49 ms 68000 KB Output is correct
5 Correct 50 ms 68000 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 49 ms 67832 KB Output is correct
2 Correct 49 ms 67944 KB Output is correct
3 Correct 51 ms 68000 KB Output is correct
4 Correct 49 ms 68000 KB Output is correct
5 Correct 50 ms 68000 KB Output is correct
6 Correct 52 ms 68020 KB Output is correct
7 Correct 49 ms 68076 KB Output is correct
8 Correct 48 ms 68076 KB Output is correct
9 Correct 49 ms 68076 KB Output is correct
10 Correct 49 ms 68092 KB Output is correct

Subtask #3
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 49 ms 67832 KB Output is correct
2 Correct 49 ms 67944 KB Output is correct
3 Correct 51 ms 68000 KB Output is correct
4 Correct 49 ms 68000 KB Output is correct
5 Correct 50 ms 68000 KB Output is correct
6 Correct 52 ms 68020 KB Output is correct
7 Correct 49 ms 68076 KB Output is correct
8 Correct 48 ms 68076 KB Output is correct
9 Correct 49 ms 68076 KB Output is correct
10 Correct 49 ms 68092 KB Output is correct
11 Correct 429 ms 100328 KB Output is correct
12 Correct 52 ms 100328 KB Output is correct
13 Correct 55 ms 100328 KB Output is correct
14 Execution timed out 1561 ms 163840 KB Time limit exceeded
15 Halted 0 ms 0 KB -

Subtask #4
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 49 ms 67832 KB Output is correct
2 Correct 49 ms 67944 KB Output is correct
3 Correct 51 ms 68000 KB Output is correct
4 Correct 49 ms 68000 KB Output is correct
5 Correct 50 ms 68000 KB Output is correct
6 Correct 52 ms 68020 KB Output is correct
7 Correct 49 ms 68076 KB Output is correct
8 Correct 48 ms 68076 KB Output is correct
9 Correct 49 ms 68076 KB Output is correct
10 Correct 49 ms 68092 KB Output is correct
11 Correct 429 ms 100328 KB Output is correct
12 Correct 52 ms 100328 KB Output is correct
13 Correct 55 ms 100328 KB Output is correct
14 Execution timed out 1561 ms 163840 KB Time limit exceeded
15 Halted 0 ms 0 KB -