oj.uz

Submission #122365

# Submission time Handle Problem Language Result Execution time Memory
122365 2019-06-28T05:50:50 Z 이온조(#2989) Robots (APIO13_robots) C++14
60 / 100
 1500 ms 155956 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];
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];
	// 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') 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++) {
		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);
			}
			while(S[c].size()) S[c].pop_back();
			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 t=1; t<=2; t++) {
			for(int p=1; p<=H; p++) {
				for(int q=1; q<=W; q++) {
					for(int j=i+1; j<=N; j++) {
						int 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];
						for(int k=s-1; k<=e+1; k++) {
							int 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) {
								if(t == 1) gmn = min(gmn, v);
								if(t == 2) {
									mn = v;
									I[p][q][j-i][j] = k;
								}
							}
						}
						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: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 6 ms 6272 KB Output is correct
2 Correct 7 ms 6144 KB Output is correct
3 Correct 6 ms 6152 KB Output is correct
4 Correct 8 ms 6360 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 6144 KB Output is correct
3 Correct 6 ms 6152 KB Output is correct
4 Correct 8 ms 6360 KB Output is correct
5 Correct 6 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 6 ms 6272 KB Output is correct
9 Correct 6 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 6 ms 6272 KB Output is correct
2 Correct 7 ms 6144 KB Output is correct
3 Correct 6 ms 6152 KB Output is correct
4 Correct 8 ms 6360 KB Output is correct
5 Correct 6 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 6 ms 6272 KB Output is correct
9 Correct 6 ms 6272 KB Output is correct
10 Correct 7 ms 6272 KB Output is correct
11 Correct 298 ms 51976 KB Output is correct
12 Correct 43 ms 39288 KB Output is correct
13 Correct 51 ms 10932 KB Output is correct
14 Correct 628 ms 60408 KB Output is correct
15 Correct 161 ms 48260 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 6144 KB Output is correct
3 Correct 6 ms 6152 KB Output is correct
4 Correct 8 ms 6360 KB Output is correct
5 Correct 6 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 6 ms 6272 KB Output is correct
9 Correct 6 ms 6272 KB Output is correct
10 Correct 7 ms 6272 KB Output is correct
11 Correct 298 ms 51976 KB Output is correct
12 Correct 43 ms 39288 KB Output is correct
13 Correct 51 ms 10932 KB Output is correct
14 Correct 628 ms 60408 KB Output is correct
15 Correct 161 ms 48260 KB Output is correct
16 Correct 180 ms 18680 KB Output is correct
17 Execution timed out 1571 ms 155956 KB Time limit exceeded
18 Halted 0 ms 0 KB -