oj.uz

Submission #122434

# Submission time Handle Problem Language Result Execution time Memory
122434 2019-06-28T08:14:26 Z 이온조(#2989) Robots (APIO13_robots) C++14
60 / 100
 1500 ms 160380 KB 
#include <cstdio>
#include <algorithm>
#include <queue>
#include <tuple>
#include <set>
#pragma GCC optimize ("Ofast")
using namespace std;
using pii = pair<int, int>;

struct node {
	int x, y, s, e;
};

node QUE[250009];

struct QUEUE {
	const int siz = 250000;
	int h = 0, t = 0;
	void push(node X) {QUE[h++] = X; h %= siz;}
	void pop() {
		t++;
		t %= siz;
	}
	node front() {
		return QUE[t];
	}
	int sz() {
		if(h >= t) return h - t;
		else return siz - t + h;
	}
};

const int dx[4] = {-1, 0, 1, 0};
const int dy[4] = {0, 1, 0, -1};
const int INF = 1e9;

char A[509][509];
int D[501][501][10][10];
char I[501][501][10][10];
pii E[501][501][4];
bool vs[501][501][10][10], chk[501][501];
vector<node> S[250009];

pii go(int x, int y, int dir) {
	int xx = x, yy = y, dd = dir;
	if(E[x][y][dir] != (pii){0, 0}) return E[x][y][dir];
	E[x][y][dir] = {-1, -1};
	// printf("in go:  x: %d, y: %d, dir: %d\n", x, y, dir);
	if(A[x][y] == 'A') dir += 3, dir %= 4;
	if(A[x][y] == 'C') dir += 1, dir %= 4;
	int X = x + dx[dir], Y = y + dy[dir];
	if(A[X][Y] == 'x') {chk[x][y] = 1; return E[xx][yy][dd] = {x, y};}
	return E[x][y][dd] = go(X, Y, dir);
}

inline void mark(node X, int dist) {
	int a = X.x, b = X.y, c = X.s, d = X.e;
	vs[a][b][c][d] = 1; D[a][b][c][d] = dist;
}

int main() {
	int N, W, H; scanf("%d%d%d",&N,&W,&H);
	for(int i=0; i<=H+1; i++) for(int j=0; j<=W+1; j++) A[i][j] = 'x';
	for(int i=1; i<=H; i++) scanf(" %s", A[i]+1);
	for(int i=1; i<=H; i++) {
		for(int j=1; j<=W; j++) {
			if('1' <= A[i][j] && A[i][j] <= '9') {
				int id = A[i][j] - '0';
				S[0].push_back({i, j, id, id});
			}
		}
		A[i][W+1] = 'x';
	}
	int sum = 0;
	QUEUE que;
	for(int i=1; i<=N; i++) {
		for(int p=1; p<=H; p++) for(int q=1; q<=W; q++) chk[p][q] = 0;
		int c = 0;
		do {
			for(auto& it: S[c]) if(!vs[it.x][it.y][it.s][it.e] && it.e - it.s + 1 == i) {
				que.push(it);
				mark(it, sum + c);
			}
			while(S[c].size()) S[c].pop_back();
			int sz = que.sz();
			while(sz--) {
				node P = que.front(); que.pop();
				chk[P.x][P.y] = 1;
				// printf("i: %d, dist: %d, x: %d, y: %d, s: %d, e: %d\n", i, sum + c, P.x, P.y, P.s, P.e);
				for(int k=0; k<4; k++) {
					int X, Y; tie(X, Y) = go(P.x, P.y, k);
					// printf("X: %d, Y: %d\n", X, Y);
					if(!vs[X][Y][P.s][P.e] && X != -1) {
						que.push({X, Y, P.s, P.e});
						mark({X, Y, P.s, P.e}, sum + c + 1);
					}
				}
			}
			++c;
		} while(que.sz());

		if(i == N) break;
		// puts("CALCULATE START");
		int gmn = INF, t, p, q, j, k, s, e, mn, v;
		for(t=1; t<=2; t++) {
			for(p=1; p<=H; p++) {
				for(q=1; q<=W; q++) {
					if(!chk[p][q]) continue;
					for(j=i+1; j<=N; j++) {
						s = j-i, e = j-1, mn = INF;
						if(i != 1) s = I[p][q][j-i][j-1], e = I[p][q][j-i+1][j];
						I[p][q][j-i][j] = j-i;
						for(k=s; k<=e+1; k++) {
							v = D[p][q][j-i][k] + D[p][q][k+1][j];
							if(vs[p][q][j-i][k] && vs[p][q][k+1][j] && mn > v) {
								mn = v;
								I[p][q][j-i][j] = k;
							}
						}
						if(t == 1) gmn = min(gmn, mn);
						if(t == 2 && mn != INF) S[mn - gmn].push_back({p, q, j-i, j});
					}
				}
			}
		}
		sum = gmn;
		if(sum == INF) break;
	}
	if(sum == INF) puts("-1");
	else printf("%d", sum);
	return 0;
}

Compilation message

robots.cpp: In function 'int main()':
robots.cpp:62:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  int N, W, H; scanf("%d%d%d",&N,&W,&H);
               ~~~~~^~~~~~~~~~~~~~~~~~~
robots.cpp:64:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1; i<=H; i++) scanf(" %s", A[i]+1);
                          ~~~~~^~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 6272 KB Output is correct
2 Correct 6 ms 6272 KB Output is correct
3 Correct 7 ms 6272 KB Output is correct
4 Correct 6 ms 6144 KB Output is correct
5 Correct 7 ms 6400 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 6272 KB Output is correct
2 Correct 6 ms 6272 KB Output is correct
3 Correct 7 ms 6272 KB Output is correct
4 Correct 6 ms 6144 KB Output is correct
5 Correct 7 ms 6400 KB Output is correct
6 Correct 9 ms 6272 KB Output is correct
7 Correct 6 ms 6272 KB Output is correct
8 Correct 6 ms 6272 KB Output is correct
9 Correct 6 ms 6272 KB Output is correct
10 Correct 6 ms 6272 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 6272 KB Output is correct
2 Correct 6 ms 6272 KB Output is correct
3 Correct 7 ms 6272 KB Output is correct
4 Correct 6 ms 6144 KB Output is correct
5 Correct 7 ms 6400 KB Output is correct
6 Correct 9 ms 6272 KB Output is correct
7 Correct 6 ms 6272 KB Output is correct
8 Correct 6 ms 6272 KB Output is correct
9 Correct 6 ms 6272 KB Output is correct
10 Correct 6 ms 6272 KB Output is correct
11 Correct 237 ms 56132 KB Output is correct
12 Correct 36 ms 39928 KB Output is correct
13 Correct 17 ms 11264 KB Output is correct
14 Correct 547 ms 64760 KB Output is correct
15 Correct 115 ms 52208 KB Output is correct

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 6272 KB Output is correct
2 Correct 6 ms 6272 KB Output is correct
3 Correct 7 ms 6272 KB Output is correct
4 Correct 6 ms 6144 KB Output is correct
5 Correct 7 ms 6400 KB Output is correct
6 Correct 9 ms 6272 KB Output is correct
7 Correct 6 ms 6272 KB Output is correct
8 Correct 6 ms 6272 KB Output is correct
9 Correct 6 ms 6272 KB Output is correct
10 Correct 6 ms 6272 KB Output is correct
11 Correct 237 ms 56132 KB Output is correct
12 Correct 36 ms 39928 KB Output is correct
13 Correct 17 ms 11264 KB Output is correct
14 Correct 547 ms 64760 KB Output is correct
15 Correct 115 ms 52208 KB Output is correct
16 Correct 33 ms 20504 KB Output is correct
17 Execution timed out 1556 ms 160380 KB Time limit exceeded
18 Halted 0 ms 0 KB -