oj.uz

Submission #122334

# Submission time Handle Problem Language Result Execution time Memory
122334 2019-06-28T05:06:15 Z 이온조(#2989) Robots (APIO13_robots) C++14
60 / 100
 839 ms 116876 KB 
#include <cstdio>
#include <algorithm>
#include <queue>
#include <tuple>
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 <= 25000) 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:39:20: 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:43:9: 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 6 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 6272 KB Output is correct
2 Correct 7 ms 6272 KB Output is correct
3 Correct 6 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 6144 KB Output is correct
7 Correct 7 ms 6272 KB Output is correct
8 Correct 6 ms 6144 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 7 ms 6272 KB Output is correct
2 Correct 7 ms 6272 KB Output is correct
3 Correct 6 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 6144 KB Output is correct
7 Correct 7 ms 6272 KB Output is correct
8 Correct 6 ms 6144 KB Output is correct
9 Correct 6 ms 6272 KB Output is correct
10 Correct 6 ms 6272 KB Output is correct
11 Correct 219 ms 45656 KB Output is correct
12 Correct 35 ms 36088 KB Output is correct
13 Correct 48 ms 6824 KB Output is correct
14 Correct 507 ms 61932 KB Output is correct
15 Correct 117 ms 40148 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 6 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 6144 KB Output is correct
7 Correct 7 ms 6272 KB Output is correct
8 Correct 6 ms 6144 KB Output is correct
9 Correct 6 ms 6272 KB Output is correct
10 Correct 6 ms 6272 KB Output is correct
11 Correct 219 ms 45656 KB Output is correct
12 Correct 35 ms 36088 KB Output is correct
13 Correct 48 ms 6824 KB Output is correct
14 Correct 507 ms 61932 KB Output is correct
15 Correct 117 ms 40148 KB Output is correct
16 Correct 96 ms 10488 KB Output is correct
17 Incorrect 839 ms 116876 KB Output isn't correct
18 Halted 0 ms 0 KB -