oj.uz

Submission #694110

# Submission time Handle Problem Language Result Execution time Memory
694110 2023-02-03T20:17:19 Z rainboy Sandwich (JOI16_sandwich) C
35 / 100
 7074 ms 22164 KB 
#include <stdio.h>
#include <string.h>

#define N	50
#define M	50
#define INF	0x3f3f3f3f

int min(int a, int b) { return a < b ? a : b; }

int kk[N + 1][M + 1];

int rect(int i1, int j1, int i2, int j2) {
	return kk[i2][j2] - kk[i2][j1] - kk[i1][j2] + kk[i1][j1];
}

int main() {
	static char cc[N][M + 1];
	static int nzl[N][M], nzr[N][M], znl[N][M], znr[N][M], nzu[N][M], nzd[N][M], znu[N][M], znd[N][M], dp[N + 1][M + 1][N + 1][M + 1], ans[N][M];
	int n, m, i, i1, i2, j, j1, j2;

	scanf("%d%d", &n, &m);
	for (i = 0; i < n; i++)
		scanf("%s", cc[i]);
	for (i = 0; i < n; i++)
		memset(ans[i], 0x3f, m * sizeof *ans[i]);
	for (i = 0; i < n; i++) {
		nzl[i][0] = -1;
		for (j = 1; j < m; j++)
			nzl[i][j] = cc[i][j - 1] == 'N' && cc[i][j] == 'Z' ? j - 1 : nzl[i][j - 1];
		nzr[i][m - 1] = m;
		for (j = m - 2; j >= 0; j--)
			nzr[i][j] = cc[i][j] == 'N' && cc[i][j + 1] == 'Z' ? j + 1 : nzr[i][j + 1];
		znl[i][0] = -1;
		for (j = 1; j < m; j++)
			znl[i][j] = cc[i][j - 1] == 'Z' && cc[i][j] == 'N' ? j - 1 : znl[i][j - 1];
		znr[i][m - 1] = m;
		for (j = m - 2; j >= 0; j--)
			znr[i][j] = cc[i][j] == 'Z' && cc[i][j + 1] == 'N' ? j + 1 : znr[i][j + 1];
	}
	for (j = 0; j < m; j++) {
		nzu[0][j] = -1;
		for (i = 1; i < n; i++)
			nzu[i][j] = cc[i - 1][j] == 'N' && cc[i][j] == 'Z' ? i - 1 : nzu[i - 1][j];
		nzd[n - 1][j] = n;
		for (i = n - 2; i >= 0; i--)
			nzd[i][j] = cc[i][j] == 'N' && cc[i + 1][j] == 'Z' ? i + 1 : nzd[i + 1][j];
		znu[0][j] = -1;
		for (i = 1; i < n; i++)
			znu[i][j] = cc[i - 1][j] == 'Z' && cc[i][j] == 'N' ? i - 1 : znu[i - 1][j];
		znd[n - 1][j] = n;
		for (i = n - 2; i >= 0; i--)
			znd[i][j] = cc[i][j] == 'Z' && cc[i + 1][j] == 'N' ? i + 1 : znd[i + 1][j];
	}
	for (i = 0; i < n; i++)
		for (j = 0; j < m; j++)
			kk[i + 1][j + 1] = cc[i][j] == 'N' ? 0 : 1;
	for (i = 1; i <= n; i++)
		for (j = 1; j <= m; j++)
			kk[i][j] += kk[i][j - 1];
	for (i = 1; i <= n; i++)
		for (j = 1; j <= m; j++)
			kk[i][j] += kk[i - 1][j];
	for (i1 = 0; i1 <= n; i1++)
		for (j1 = 0; j1 <= m; j1++)
			for (i2 = n; i2 >= i1; i2--)
				memset(dp[i1][j1][i2], 0x3f, (m + 1) * sizeof *dp[i1][j1][i2]);
	dp[0][0][n][m] = 0;
	for (i1 = 0; i1 <= n; i1++)
		for (j1 = 0; j1 <= m; j1++)
			for (i2 = n; i2 >= i1; i2--)
				for (j2 = m; j2 >= j1; j2--) {
					int x = dp[i1][j1][i2][j2];

					if (x == INF)
						continue;
					if (i1 + 1 < i2 && nzr[i1][j1] > j2 - 1)
						dp[i1 + 1][j1][i2][j2] = min(dp[i1 + 1][j1][i2][j2], x + (j2 - j1));
					if (i2 - 1 > i1 && znr[i2 - 1][j1] > j2 - 1)
						dp[i1][j1][i2 - 1][j2] = min(dp[i1][j1][i2 - 1][j2], x + (j2 - j1));
					if (j1 + 1 < j2 && nzd[i1][j1] > i2 - 1)
						dp[i1][j1 + 1][i2][j2] = min(dp[i1][j1 + 1][i2][j2], x + (i2 - i1));
					if (j2 - 1 > j1 && znd[i1][j2 - 1] > i2 - 1)
						dp[i1][j1][i2][j2 - 1] = min(dp[i1][j1][i2][j2 - 1], x + (i2 - i1));
					for (i = i1; i <= i2; i++)
						for (j = j1; j <= j2; j++) {
							int ul = rect(i1, j1, i, j) == (i - i1) * (j - j1);
							int ur = rect(i1, j, i, j2) == 0;
							int dl = rect(i, j1, i2, j) == 0;
							int dr = rect(i, j, i2, j2) == (i2 - i) * (j2 - j);

							if (ul && i1 < i && j1 < j)
								ans[i - 1][j - 1] = min(ans[i - 1][j - 1], (x + (i - i1) * (j - j1)) * 2);
							if (ur && i1 < i && j < j2)
								ans[i - 1][j] = min(ans[i - 1][j], (x + (i - i1) * (j2 - j)) * 2);
							if (dl && i < i2 && j1 < j)
								ans[i][j - 1] = min(ans[i][j - 1], (x + (i2 - i) * (j - j1)) * 2);
							if (dr && i < i2 && j < j2)
								ans[i][j] = min(ans[i][j], (x + (i2 - i) * (j2 - j)) * 2);
							if (ul && dr) {
								dp[i1][j][i][j2] = min(dp[i1][j][i][j2], x + (i - i1) * (j - j1) + (i2 - i) * (j2 - j));
								dp[i][j1][i2][j] = min(dp[i][j1][i2][j], x + (i - i1) * (j - j1) + (i2 - i) * (j2 - j));
							}
							if (ur && dl) {
								dp[i1][j1][i][j] = min(dp[i1][j1][i][j], x + (i - i1) * (j2 - j) + (i2 - i) * (j - j1));
								dp[i][j][i2][j2] = min(dp[i][j][i2][j2], x + (i - i1) * (j2 - j) + (i2 - i) * (j - j1));
							}
						}
				}
	for (i = 0; i < n; i++)
		for (j = 0; j < m; j++)
			printf("%d%c", ans[i][j] == INF ? -1 : ans[i][j], j + 1 < m ? ' ' : '\n');
	return 0;
}

Compilation message

sandwich.c: In function 'main':
sandwich.c:21:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |  scanf("%d%d", &n, &m);
      |  ^~~~~~~~~~~~~~~~~~~~~
sandwich.c:23:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |   scanf("%s", cc[i]);
      |   ^~~~~~~~~~~~~~~~~~

Subtask #1
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 724 KB Output is correct
3 Correct 2 ms 1236 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 1620 KB Output is correct
6 Correct 16 ms 22156 KB Output is correct
7 Correct 1734 ms 20820 KB Output is correct
8 Correct 2576 ms 22136 KB Output is correct
9 Correct 767 ms 16900 KB Output is correct
10 Correct 974 ms 22136 KB Output is correct
11 Correct 16 ms 22160 KB Output is correct
12 Correct 8 ms 11792 KB Output is correct
13 Correct 17 ms 22160 KB Output is correct
14 Correct 19 ms 22100 KB Output is correct
15 Correct 7074 ms 22152 KB Output is correct
16 Correct 87 ms 22144 KB Output is correct
17 Correct 76 ms 22144 KB Output is correct
18 Correct 56 ms 22144 KB Output is correct
19 Correct 123 ms 22144 KB Output is correct
20 Correct 64 ms 22100 KB Output is correct
21 Correct 31 ms 22144 KB Output is correct
22 Correct 24 ms 22160 KB Output is correct
23 Correct 21 ms 22156 KB Output is correct
24 Correct 20 ms 22160 KB Output is correct
25 Correct 22 ms 22160 KB Output is correct
26 Correct 20 ms 22164 KB Output is correct
27 Correct 72 ms 22096 KB Output is correct
28 Correct 19 ms 22160 KB Output is correct

Subtask #2
0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 724 KB Output is correct
3 Correct 2 ms 1236 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 1620 KB Output is correct
6 Correct 16 ms 22156 KB Output is correct
7 Correct 1734 ms 20820 KB Output is correct
8 Correct 2576 ms 22136 KB Output is correct
9 Correct 767 ms 16900 KB Output is correct
10 Correct 974 ms 22136 KB Output is correct
11 Correct 16 ms 22160 KB Output is correct
12 Correct 8 ms 11792 KB Output is correct
13 Correct 17 ms 22160 KB Output is correct
14 Correct 19 ms 22100 KB Output is correct
15 Correct 7074 ms 22152 KB Output is correct
16 Correct 87 ms 22144 KB Output is correct
17 Correct 76 ms 22144 KB Output is correct
18 Correct 56 ms 22144 KB Output is correct
19 Correct 123 ms 22144 KB Output is correct
20 Correct 64 ms 22100 KB Output is correct
21 Correct 31 ms 22144 KB Output is correct
22 Correct 24 ms 22160 KB Output is correct
23 Correct 21 ms 22156 KB Output is correct
24 Correct 20 ms 22160 KB Output is correct
25 Correct 22 ms 22160 KB Output is correct
26 Correct 20 ms 22164 KB Output is correct
27 Correct 72 ms 22096 KB Output is correct
28 Correct 19 ms 22160 KB Output is correct
29 Incorrect 387 ms 2860 KB Output isn't correct
30 Halted 0 ms 0 KB -