oj.uz

Submission #122345

# Submission time Handle Problem Language Result Execution time Memory
122345 2019-06-28T05:18:59 Z 이온조(#2989) Robots (APIO13_robots) C++14
60 / 100
 1500 ms 139912 KB 
#include <cstdio>
#include <algorithm>
#include <queue>
#include <tuple>
#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];
pii E[501][501][4];
bool vs[501][501][10][10];
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];
	while(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') break;
		x = X; y = Y;
	}
	// puts("done");
	return E[xx][yy][dd] = {x, y};
}

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++) {
		for(int j=1; j<=W; j++) {
			scanf(" %c", &A[i][j]);
			if('1' <= A[i][j] && A[i][j] <= '9') {
				int id = A[i][j] - '0';
				S[0].push_back({i, j, id, id});
			}
		}
	}
	int sum = 0;
	queue<node> que;
	for(int i=1; i<=N; i++) {
		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);
			}
			S[c].clear();
			int sz = que.size();
			while(sz--) {
				node P = que.front(); que.pop();
				// 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]) {
						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;
		for(int p=1; p<=H; p++) {
			for(int q=1; q<=W; q++) {
				for(int j=i+1; j<=N; j++) {
					for(int k=j-i; k<j; k++) {
						if(vs[p][q][j-i][k] && vs[p][q][k+1][j]) {
							gmn = min(gmn, D[p][q][j-i][k] + D[p][q][k+1][j]);
						}
					}
				}
			}
		}
		for(int p=1; p<=H; p++) {
			for(int q=1; q<=W; q++) {
				for(int j=i+1; j<=N; j++) {
					int mn = 1e9;
					for(int k=j-i; k<j; k++) {
						if(vs[p][q][j-i][k] && vs[p][q][k+1][j]) {
							mn = min(mn, D[p][q][j-i][k] + D[p][q][k+1][j]);
						}
					}
					if(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:43:20: 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:47:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf(" %c", &A[i][j]);
    ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 6272 KB Output is correct
2 Correct 7 ms 6272 KB Output is correct
3 Correct 6 ms 6244 KB Output is correct
4 Correct 6 ms 6272 KB Output is correct
5 Correct 6 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 7 ms 6272 KB Output is correct
3 Correct 6 ms 6244 KB Output is correct
4 Correct 6 ms 6272 KB Output is correct
5 Correct 6 ms 6400 KB Output is correct
6 Correct 6 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 6244 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 7 ms 6272 KB Output is correct
3 Correct 6 ms 6244 KB Output is correct
4 Correct 6 ms 6272 KB Output is correct
5 Correct 6 ms 6400 KB Output is correct
6 Correct 6 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 6244 KB Output is correct
10 Correct 6 ms 6272 KB Output is correct
11 Correct 216 ms 44900 KB Output is correct
12 Correct 40 ms 38776 KB Output is correct
13 Correct 35 ms 6784 KB Output is correct
14 Correct 553 ms 53644 KB Output is correct
15 Correct 132 ms 41200 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 7 ms 6272 KB Output is correct
3 Correct 6 ms 6244 KB Output is correct
4 Correct 6 ms 6272 KB Output is correct
5 Correct 6 ms 6400 KB Output is correct
6 Correct 6 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 6244 KB Output is correct
10 Correct 6 ms 6272 KB Output is correct
11 Correct 216 ms 44900 KB Output is correct
12 Correct 40 ms 38776 KB Output is correct
13 Correct 35 ms 6784 KB Output is correct
14 Correct 553 ms 53644 KB Output is correct
15 Correct 132 ms 41200 KB Output is correct
16 Correct 135 ms 11988 KB Output is correct
17 Execution timed out 1555 ms 139912 KB Time limit exceeded
18 Halted 0 ms 0 KB -