oj.uz

Submission #122343

# Submission time Handle Problem Language Result Execution time Memory
122343 2019-06-28T05:13:51 Z 이온조(#2989) Robots (APIO13_robots) C++14
60 / 100
 1366 ms 155580 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) {
	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});
			}
		}
	}
	for(int i=1; i<=H; i++) for(int j=1; j<=W; j++) for(int k=0; k<4; k++) if(A[i][j] != 'x') E[i][j][k] = go(i, j, k);
	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) = E[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 <= 70000) 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:41:20: 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:45:9: 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 7 ms 6272 KB Output is correct
2 Correct 7 ms 6272 KB Output is correct
3 Correct 7 ms 6272 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 7 ms 6272 KB Output is correct
2 Correct 7 ms 6272 KB Output is correct
3 Correct 7 ms 6272 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 6272 KB Output is correct
7 Correct 7 ms 6272 KB Output is correct
8 Correct 12 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 6272 KB Output is correct
2 Correct 7 ms 6272 KB Output is correct
3 Correct 7 ms 6272 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 6272 KB Output is correct
7 Correct 7 ms 6272 KB Output is correct
8 Correct 12 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 241 ms 48828 KB Output is correct
12 Correct 41 ms 39288 KB Output is correct
13 Correct 133 ms 10872 KB Output is correct
14 Correct 547 ms 65724 KB Output is correct
15 Correct 115 ms 43220 KB Output is correct

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 6272 KB Output is correct
2 Correct 7 ms 6272 KB Output is correct
3 Correct 7 ms 6272 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 6272 KB Output is correct
7 Correct 7 ms 6272 KB Output is correct
8 Correct 12 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 241 ms 48828 KB Output is correct
12 Correct 41 ms 39288 KB Output is correct
13 Correct 133 ms 10872 KB Output is correct
14 Correct 547 ms 65724 KB Output is correct
15 Correct 115 ms 43220 KB Output is correct
16 Correct 931 ms 18460 KB Output is correct
17 Incorrect 1366 ms 155580 KB Output isn't correct
18 Halted 0 ms 0 KB -