| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 433990 |
2021-06-20T13:26:30 Z |
rainboy |
Mecho (IOI09_mecho) |
C |
|
229 ms |
9024 KB |
#include <stdio.h>
#define N 800
int di[] = { -1, 1, 0, 0 };
int dj[] = { 0, 0, -1, 1 };
char cc[N][N + 1];
int dd_[N][N], dd[N][N], qu[N * N], n, s;
int solve(int im, int jm, int id, int jd, int t) {
int i, j, head, cnt;
for (i = 0; i < n; i++)
for (j = 0; j < n; j++)
dd[i][j] = n * n;
head = cnt = 0;
dd[im][jm] = 0, qu[head + cnt++] = im * n + jm;
while (cnt) {
int ij, h, d;
ij = qu[cnt--, head++], i = ij / n, j = ij % n, d = dd[i][j] + 1;
if (dd_[i][j] <= t + dd[i][j] / s)
continue;
if (i == id && j == jd)
return 1;
for (h = 0; h < 4; h++) {
int i_ = i + di[h], j_ = j + dj[h];
if (i_ >= 0 && i_ < n && j_ >= 0 && j_ < n && cc[i_][j_] != 'T' && dd[i_][j_] > d)
dd[i_][j_] = d, qu[head + cnt++] = i_ * n + j_;
}
}
return 0;
}
int main() {
int i, j, im, jm, id, jd, head, cnt, lower, upper;
scanf("%d%d", &n, &s);
for (i = 0; i < n; i++)
scanf("%s", cc[i]);
head = cnt = 0;
im = jm = id = jd = -1;
for (i = 0; i < n; i++)
for (j = 0; j < n; j++) {
if (cc[i][j] == 'H')
dd_[i][j] = 0, qu[head + cnt++] = i * n + j;
else
dd_[i][j] = n * n;
if (cc[i][j] == 'M')
im = i, jm = j;
else if (cc[i][j] == 'D')
id = i, jd = j;
}
while (cnt) {
int ij, d, h;
ij = qu[cnt--, head++], i = ij / n, j = ij % n, d = dd_[i][j] + 1;
for (h = 0; h < 4; h++) {
int i_ = i + di[h], j_ = j + dj[h];
if (i_ >= 0 && i_ < n && j_ >= 0 && j_ < n && (cc[i_][j_] == 'G' || cc[i_][j_] == 'M') && dd_[i_][j_] > d)
dd_[i_][j_] = d, qu[head + cnt++] = i_ * n + j_;
}
}
lower = -1, upper = n * n + 1;
while (upper - lower > 1) {
int t = (lower + upper) / 2;
if (solve(im, jm, id, jd, t))
lower = t;
else
upper = t;
}
printf("%d\n", lower);
return 0;
}
Compilation message
mecho.c: In function 'main':
mecho.c:41:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
41 | scanf("%d%d", &n, &s);
| ^~~~~~~~~~~~~~~~~~~~~
mecho.c:43:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
43 | scanf("%s", cc[i]);
| ^~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
204 KB |
Output is correct |
| 2 |
Correct |
1 ms |
332 KB |
Output is correct |
| 3 |
Correct |
1 ms |
332 KB |
Output is correct |
| 4 |
Correct |
1 ms |
332 KB |
Output is correct |
| 5 |
Correct |
1 ms |
332 KB |
Output is correct |
| 6 |
Correct |
1 ms |
332 KB |
Output is correct |
| 7 |
Correct |
101 ms |
9024 KB |
Output is correct |
| 8 |
Correct |
1 ms |
332 KB |
Output is correct |
| 9 |
Correct |
1 ms |
288 KB |
Output is correct |
| 10 |
Correct |
1 ms |
332 KB |
Output is correct |
| 11 |
Correct |
1 ms |
332 KB |
Output is correct |
| 12 |
Correct |
1 ms |
724 KB |
Output is correct |
| 13 |
Correct |
1 ms |
588 KB |
Output is correct |
| 14 |
Correct |
1 ms |
716 KB |
Output is correct |
| 15 |
Correct |
1 ms |
332 KB |
Output is correct |
| 16 |
Correct |
1 ms |
332 KB |
Output is correct |
| 17 |
Correct |
1 ms |
460 KB |
Output is correct |
| 18 |
Correct |
1 ms |
460 KB |
Output is correct |
| 19 |
Correct |
1 ms |
460 KB |
Output is correct |
| 20 |
Correct |
1 ms |
460 KB |
Output is correct |
| 21 |
Correct |
1 ms |
460 KB |
Output is correct |
| 22 |
Correct |
1 ms |
460 KB |
Output is correct |
| 23 |
Correct |
1 ms |
588 KB |
Output is correct |
| 24 |
Correct |
1 ms |
588 KB |
Output is correct |
| 25 |
Correct |
1 ms |
672 KB |
Output is correct |
| 26 |
Correct |
1 ms |
716 KB |
Output is correct |
| 27 |
Correct |
1 ms |
716 KB |
Output is correct |
| 28 |
Correct |
1 ms |
716 KB |
Output is correct |
| 29 |
Correct |
1 ms |
716 KB |
Output is correct |
| 30 |
Correct |
1 ms |
716 KB |
Output is correct |
| 31 |
Correct |
1 ms |
844 KB |
Output is correct |
| 32 |
Correct |
1 ms |
844 KB |
Output is correct |
| 33 |
Correct |
5 ms |
3108 KB |
Output is correct |
| 34 |
Correct |
6 ms |
3020 KB |
Output is correct |
| 35 |
Correct |
24 ms |
3208 KB |
Output is correct |
| 36 |
Correct |
7 ms |
3532 KB |
Output is correct |
| 37 |
Correct |
7 ms |
3496 KB |
Output is correct |
| 38 |
Correct |
30 ms |
3628 KB |
Output is correct |
| 39 |
Correct |
8 ms |
4060 KB |
Output is correct |
| 40 |
Correct |
8 ms |
4044 KB |
Output is correct |
| 41 |
Correct |
42 ms |
4172 KB |
Output is correct |
| 42 |
Correct |
9 ms |
4520 KB |
Output is correct |
| 43 |
Correct |
10 ms |
4548 KB |
Output is correct |
| 44 |
Correct |
53 ms |
4784 KB |
Output is correct |
| 45 |
Correct |
11 ms |
5064 KB |
Output is correct |
| 46 |
Correct |
11 ms |
5052 KB |
Output is correct |
| 47 |
Correct |
59 ms |
5296 KB |
Output is correct |
| 48 |
Correct |
12 ms |
5580 KB |
Output is correct |
| 49 |
Correct |
12 ms |
5580 KB |
Output is correct |
| 50 |
Correct |
74 ms |
5908 KB |
Output is correct |
| 51 |
Correct |
15 ms |
6000 KB |
Output is correct |
| 52 |
Correct |
19 ms |
6092 KB |
Output is correct |
| 53 |
Correct |
110 ms |
6468 KB |
Output is correct |
| 54 |
Correct |
16 ms |
6572 KB |
Output is correct |
| 55 |
Correct |
16 ms |
6660 KB |
Output is correct |
| 56 |
Correct |
104 ms |
7000 KB |
Output is correct |
| 57 |
Correct |
23 ms |
7208 KB |
Output is correct |
| 58 |
Correct |
21 ms |
7172 KB |
Output is correct |
| 59 |
Correct |
118 ms |
7764 KB |
Output is correct |
| 60 |
Correct |
21 ms |
7668 KB |
Output is correct |
| 61 |
Correct |
22 ms |
7756 KB |
Output is correct |
| 62 |
Correct |
136 ms |
8500 KB |
Output is correct |
| 63 |
Correct |
119 ms |
8132 KB |
Output is correct |
| 64 |
Correct |
229 ms |
8024 KB |
Output is correct |
| 65 |
Correct |
169 ms |
8016 KB |
Output is correct |
| 66 |
Correct |
137 ms |
8004 KB |
Output is correct |
| 67 |
Correct |
133 ms |
7900 KB |
Output is correct |
| 68 |
Correct |
55 ms |
7976 KB |
Output is correct |
| 69 |
Correct |
55 ms |
8004 KB |
Output is correct |
| 70 |
Correct |
42 ms |
8132 KB |
Output is correct |
| 71 |
Correct |
49 ms |
8028 KB |
Output is correct |
| 72 |
Correct |
39 ms |
8004 KB |
Output is correct |
| 73 |
Correct |
41 ms |
8968 KB |
Output is correct |
| 74 |
Correct |
79 ms |
8908 KB |
Output is correct |
| 75 |
Correct |
89 ms |
9008 KB |
Output is correct |
| 76 |
Correct |
77 ms |
9000 KB |
Output is correct |
| 77 |
Correct |
80 ms |
8900 KB |
Output is correct |
| 78 |
Correct |
99 ms |
8952 KB |
Output is correct |
| 79 |
Correct |
61 ms |
8996 KB |
Output is correct |
| 80 |
Correct |
82 ms |
9012 KB |
Output is correct |
| 81 |
Correct |
87 ms |
8896 KB |
Output is correct |
| 82 |
Correct |
81 ms |
9020 KB |
Output is correct |
| 83 |
Correct |
93 ms |
9000 KB |
Output is correct |
| 84 |
Correct |
80 ms |
8996 KB |
Output is correct |
| 85 |
Correct |
91 ms |
8896 KB |
Output is correct |
| 86 |
Correct |
88 ms |
8932 KB |
Output is correct |
| 87 |
Correct |
114 ms |
8912 KB |
Output is correct |
| 88 |
Correct |
97 ms |
9008 KB |
Output is correct |
| 89 |
Correct |
98 ms |
9008 KB |
Output is correct |
| 90 |
Correct |
101 ms |
9008 KB |
Output is correct |
| 91 |
Correct |
98 ms |
9008 KB |
Output is correct |
| 92 |
Correct |
123 ms |
8952 KB |
Output is correct |
