oj.uz

Submission #122339

# Submission time Handle Problem Language Result Execution time Memory
122339 2019-06-28T05:10:13 Z 이온조(#2989) Robots (APIO13_robots) C++14
60 / 100
 1500 ms 162028 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];
bool vs[501][501][10][10];
vector<node> S[250009];

pii go(int x, int y, int 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 {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;
		vector<pair<int, node> > R;
		for(int p=1; p<=H; p++) {
			for(int q=1; q<=W; q++) {
				for(int j=i+1; j<=N; j++) {
					int l = j - i, r = j, mn = 1e9;
					for(int k=l; k<r; k++) {
						// printf("p: %d, q: %d, l: %d, r: %d, k: %d\n", p, q, l, r, k);
						if(vs[p][q][l][k] && vs[p][q][k+1][r]) {
							// printf("value: %d\n", D[p][q][l][k] + D[p][q][k+1][r]);
							gmn = min(gmn, D[p][q][l][k] + D[p][q][k+1][r]);
							mn = min(mn, D[p][q][l][k] + D[p][q][k+1][r]);
						}
					}
					if(mn != 1e9) R.push_back({mn, {p, q, l, r}});
				}
			}
		}
		for(auto& it: R) {
			// printf("value: %d gmn: %d\n", it.first, gmn);
			if(it.first - gmn <= 100000) S[it.first - gmn].push_back(it.second);
		}
		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:40:20: 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:44:9: 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 6172 KB Output is correct
2 Correct 7 ms 6144 KB Output is correct
3 Correct 6 ms 6144 KB Output is correct
4 Correct 6 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 6 ms 6172 KB Output is correct
2 Correct 7 ms 6144 KB Output is correct
3 Correct 6 ms 6144 KB Output is correct
4 Correct 6 ms 6272 KB Output is correct
5 Correct 7 ms 6400 KB Output is correct
6 Correct 6 ms 6144 KB Output is correct
7 Correct 6 ms 6156 KB Output is correct
8 Correct 7 ms 6272 KB Output is correct
9 Correct 7 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 6172 KB Output is correct
2 Correct 7 ms 6144 KB Output is correct
3 Correct 6 ms 6144 KB Output is correct
4 Correct 6 ms 6272 KB Output is correct
5 Correct 7 ms 6400 KB Output is correct
6 Correct 6 ms 6144 KB Output is correct
7 Correct 6 ms 6156 KB Output is correct
8 Correct 7 ms 6272 KB Output is correct
9 Correct 7 ms 6272 KB Output is correct
10 Correct 6 ms 6272 KB Output is correct
11 Correct 221 ms 45536 KB Output is correct
12 Correct 34 ms 36092 KB Output is correct
13 Correct 43 ms 6764 KB Output is correct
14 Correct 544 ms 62532 KB Output is correct
15 Correct 104 ms 40084 KB Output is correct

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 6172 KB Output is correct
2 Correct 7 ms 6144 KB Output is correct
3 Correct 6 ms 6144 KB Output is correct
4 Correct 6 ms 6272 KB Output is correct
5 Correct 7 ms 6400 KB Output is correct
6 Correct 6 ms 6144 KB Output is correct
7 Correct 6 ms 6156 KB Output is correct
8 Correct 7 ms 6272 KB Output is correct
9 Correct 7 ms 6272 KB Output is correct
10 Correct 6 ms 6272 KB Output is correct
11 Correct 221 ms 45536 KB Output is correct
12 Correct 34 ms 36092 KB Output is correct
13 Correct 43 ms 6764 KB Output is correct
14 Correct 544 ms 62532 KB Output is correct
15 Correct 104 ms 40084 KB Output is correct
16 Correct 86 ms 10368 KB Output is correct
17 Execution timed out 1571 ms 162028 KB Time limit exceeded
18 Halted 0 ms 0 KB -