oj.uz

Submission #122377

# Submission time Handle Problem Language Result Execution time Memory
122377 2019-06-28T06:21:03 Z 이온조(#2989) Robots (APIO13_robots) C++14
60 / 100
 1500 ms 156396 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;
};

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

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<node> 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.size();
			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.size());

		if(i == N) break;
		// puts("CALCULATE START");
		int gmn = 1e9, 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 = 1e9;
						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 != 1e9) S[mn - gmn].push_back({p, q, j-i, j});
					}
				}
			}
		}
		sum = gmn;
		if(sum == 1e9) break;
	}
	if(sum == 1e9) puts("-1");
	else printf("%d", sum);
	return 0;
}

Compilation message

robots.cpp: In function 'int main()':
robots.cpp:42:20: 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:44:31: 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 7 ms 6144 KB Output is correct
2 Correct 7 ms 6272 KB Output is correct
3 Correct 7 ms 6272 KB Output is correct
4 Correct 7 ms 6272 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 7 ms 6144 KB Output is correct
2 Correct 7 ms 6272 KB Output is correct
3 Correct 7 ms 6272 KB Output is correct
4 Correct 7 ms 6272 KB Output is correct
5 Correct 7 ms 6400 KB Output is correct
6 Correct 6 ms 6272 KB Output is correct
7 Correct 7 ms 6272 KB Output is correct
8 Correct 7 ms 6272 KB Output is correct
9 Correct 7 ms 6272 KB Output is correct
10 Correct 7 ms 6272 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 6144 KB Output is correct
2 Correct 7 ms 6272 KB Output is correct
3 Correct 7 ms 6272 KB Output is correct
4 Correct 7 ms 6272 KB Output is correct
5 Correct 7 ms 6400 KB Output is correct
6 Correct 6 ms 6272 KB Output is correct
7 Correct 7 ms 6272 KB Output is correct
8 Correct 7 ms 6272 KB Output is correct
9 Correct 7 ms 6272 KB Output is correct
10 Correct 7 ms 6272 KB Output is correct
11 Correct 221 ms 52064 KB Output is correct
12 Correct 36 ms 39396 KB Output is correct
13 Correct 17 ms 11008 KB Output is correct
14 Correct 590 ms 60664 KB Output is correct
15 Correct 113 ms 48372 KB Output is correct

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 6144 KB Output is correct
2 Correct 7 ms 6272 KB Output is correct
3 Correct 7 ms 6272 KB Output is correct
4 Correct 7 ms 6272 KB Output is correct
5 Correct 7 ms 6400 KB Output is correct
6 Correct 6 ms 6272 KB Output is correct
7 Correct 7 ms 6272 KB Output is correct
8 Correct 7 ms 6272 KB Output is correct
9 Correct 7 ms 6272 KB Output is correct
10 Correct 7 ms 6272 KB Output is correct
11 Correct 221 ms 52064 KB Output is correct
12 Correct 36 ms 39396 KB Output is correct
13 Correct 17 ms 11008 KB Output is correct
14 Correct 590 ms 60664 KB Output is correct
15 Correct 113 ms 48372 KB Output is correct
16 Correct 31 ms 20344 KB Output is correct
17 Execution timed out 1564 ms 156396 KB Time limit exceeded
18 Halted 0 ms 0 KB -