| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 768228 |
2023-06-27T18:47:30 Z |
rainboy |
Bomb (IZhO17_bomb) |
C |
|
426 ms |
110540 KB |
#include <stdio.h>
#define N 2500
#define M 2500
int min(int a, int b) { return a < b ? a : b; }
int max(int a, int b) { return a > b ? a : b; }
int main() {
static char cc[N][M + 1];
static int ll[N][M], rr[N][M], uu[N][M], dd[N][M], yy[N + 1];
int n, m, i, i_, j, j_, l, r, u, d, x, y, ans;
scanf("%d%d", &n, &m);
for (i = 0; i < n; i++)
scanf("%s", cc[i]);
for (i = 0; i < n; i++) {
for (j = 0; j < m; j++)
ll[i][j] = cc[i][j] == '0' ? j + 1 : (j == 0 ? 0 : ll[i][j - 1]);
for (j = m - 1; j >= 0; j--)
rr[i][j] = cc[i][j] == '0' ? j - 1 : (j + 1 == m ? m - 1 : rr[i][j + 1]);
}
for (j = 0; j < m; j++) {
for (i = 0; i < n; i++)
uu[i][j] = cc[i][j] == '0' ? i + 1 : (i == 0 ? 0 : uu[i - 1][j]);
for (i = n - 1; i >= 0; i--)
dd[i][j] = cc[i][j] == '0' ? i - 1 : (i + 1 == n ? n - 1 : dd[i + 1][j]);
}
for (x = 1; x <= n; x++)
yy[x] = m;
for (i = 0; i < n; i++)
for (j = 0; j < m; j++) {
if (ll[i][j] == j) {
j_ = j, u = 0, d = n - 1;
while (j_ <= rr[i][j]) {
u = max(u, uu[i][j_]), d = min(d, dd[i][j_]);
x = d - u + 1, y = j_ - j;
if (x < n)
yy[x + 1] = min(yy[x + 1], y);
j_++;
}
x = 0, y = j_ - j;
if (x < n)
yy[x + 1] = min(yy[x + 1], y);
}
if (rr[i][j] == j) {
j_ = j, u = 0, d = n - 1;
while (j_ >= ll[i][j]) {
u = max(u, uu[i][j_]), d = min(d, dd[i][j_]);
x = d - u + 1, y = j - j_;
if (x < n)
yy[x + 1] = min(yy[x + 1], y);
j_--;
}
x = 0, y = j - j_;
if (x < n)
yy[x + 1] = min(yy[x + 1], y);
}
if (uu[i][j] == i) {
i_ = i, l = 0, r = m - 1;
while (i_ <= dd[i][j]) {
l = max(l, ll[i_][j]), r = max(r, rr[i_][j]);
x = i_ - i, y = r - l + 1;
if (x < n)
yy[x + 1] = min(yy[x + 1], y);
i_++;
}
x = i_ - i, y = 0;
if (x < n)
yy[x + 1] = min(yy[x + 1], y);
}
if (dd[i][j] == i) {
i_ = i, l = 0, r = m - 1;
while (i_ >= uu[i][j]) {
l = max(l, ll[i_][j]), r = max(r, rr[i_][j]);
x = i - i_, y = r - l + 1;
if (x < n)
yy[x + 1] = min(yy[x + 1], y);
i_--;
}
x = i - i_, y = 0;
if (x < n)
yy[x + 1] = min(yy[x + 1], y);
}
}
y = m, ans = 0;
for (x = 1; x <= n; x++) {
y = min(y, yy[x]);
ans = max(ans, x * y);
}
printf("%d\n", ans);
return 0;
}
Compilation message
bomb.c: In function 'main':
bomb.c:14:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
14 | scanf("%d%d", &n, &m);
| ^~~~~~~~~~~~~~~~~~~~~
bomb.c:16:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
16 | scanf("%s", cc[i]);
| ^~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
1 ms |
596 KB |
Output is correct |
| 3 |
Correct |
16 ms |
46548 KB |
Output is correct |
| 4 |
Correct |
14 ms |
46504 KB |
Output is correct |
| 5 |
Correct |
1 ms |
288 KB |
Output is correct |
| 6 |
Correct |
1 ms |
288 KB |
Output is correct |
| 7 |
Correct |
0 ms |
340 KB |
Output is correct |
| 8 |
Correct |
1 ms |
676 KB |
Output is correct |
| 9 |
Correct |
1 ms |
596 KB |
Output is correct |
| 10 |
Correct |
1 ms |
468 KB |
Output is correct |
| 11 |
Correct |
1 ms |
596 KB |
Output is correct |
| 12 |
Correct |
1 ms |
468 KB |
Output is correct |
| 13 |
Correct |
1 ms |
548 KB |
Output is correct |
| 14 |
Correct |
1 ms |
548 KB |
Output is correct |
| 15 |
Correct |
1 ms |
596 KB |
Output is correct |
| 16 |
Correct |
1 ms |
596 KB |
Output is correct |
| 17 |
Correct |
1 ms |
1492 KB |
Output is correct |
| 18 |
Correct |
1 ms |
1620 KB |
Output is correct |
| 19 |
Correct |
1 ms |
2088 KB |
Output is correct |
| 20 |
Correct |
1 ms |
2088 KB |
Output is correct |
| 21 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 22 |
Correct |
1 ms |
1836 KB |
Output is correct |
| 23 |
Correct |
1 ms |
2260 KB |
Output is correct |
| 24 |
Correct |
1 ms |
1836 KB |
Output is correct |
| 25 |
Correct |
1 ms |
2260 KB |
Output is correct |
| 26 |
Correct |
1 ms |
2260 KB |
Output is correct |
| 27 |
Correct |
4 ms |
6996 KB |
Output is correct |
| 28 |
Correct |
3 ms |
7508 KB |
Output is correct |
| 29 |
Correct |
6 ms |
9576 KB |
Output is correct |
| 30 |
Correct |
6 ms |
11308 KB |
Output is correct |
| 31 |
Correct |
5 ms |
8976 KB |
Output is correct |
| 32 |
Correct |
6 ms |
10324 KB |
Output is correct |
| 33 |
Correct |
7 ms |
11860 KB |
Output is correct |
| 34 |
Correct |
4 ms |
8236 KB |
Output is correct |
| 35 |
Correct |
6 ms |
11940 KB |
Output is correct |
| 36 |
Correct |
9 ms |
11984 KB |
Output is correct |
| 37 |
Correct |
1 ms |
596 KB |
Output is correct |
| 38 |
Correct |
392 ms |
110332 KB |
Output is correct |
| 39 |
Correct |
1 ms |
596 KB |
Output is correct |
| 40 |
Correct |
35 ms |
29208 KB |
Output is correct |
| 41 |
Correct |
1 ms |
596 KB |
Output is correct |
| 42 |
Correct |
1 ms |
2260 KB |
Output is correct |
| 43 |
Correct |
327 ms |
110364 KB |
Output is correct |
| 44 |
Correct |
8 ms |
11988 KB |
Output is correct |
| 45 |
Correct |
308 ms |
110336 KB |
Output is correct |
| 46 |
Correct |
232 ms |
110348 KB |
Output is correct |
| 47 |
Correct |
318 ms |
110448 KB |
Output is correct |
| 48 |
Correct |
278 ms |
110244 KB |
Output is correct |
| 49 |
Correct |
426 ms |
110284 KB |
Output is correct |
| 50 |
Correct |
292 ms |
110360 KB |
Output is correct |
| 51 |
Correct |
305 ms |
110460 KB |
Output is correct |
| 52 |
Correct |
272 ms |
110332 KB |
Output is correct |
| 53 |
Correct |
274 ms |
110348 KB |
Output is correct |
| 54 |
Correct |
240 ms |
110332 KB |
Output is correct |
| 55 |
Correct |
234 ms |
110328 KB |
Output is correct |
| 56 |
Correct |
371 ms |
110248 KB |
Output is correct |
| 57 |
Correct |
236 ms |
110324 KB |
Output is correct |
| 58 |
Correct |
237 ms |
110320 KB |
Output is correct |
| 59 |
Correct |
224 ms |
110328 KB |
Output is correct |
| 60 |
Correct |
280 ms |
110328 KB |
Output is correct |
| 61 |
Correct |
406 ms |
110460 KB |
Output is correct |
| 62 |
Correct |
377 ms |
110332 KB |
Output is correct |
| 63 |
Correct |
389 ms |
110336 KB |
Output is correct |
| 64 |
Correct |
213 ms |
110348 KB |
Output is correct |
| 65 |
Correct |
278 ms |
110348 KB |
Output is correct |
| 66 |
Correct |
275 ms |
110344 KB |
Output is correct |
| 67 |
Correct |
299 ms |
110332 KB |
Output is correct |
| 68 |
Correct |
309 ms |
110332 KB |
Output is correct |
| 69 |
Correct |
235 ms |
110324 KB |
Output is correct |
| 70 |
Correct |
114 ms |
87244 KB |
Output is correct |
| 71 |
Correct |
202 ms |
110320 KB |
Output is correct |
| 72 |
Correct |
227 ms |
110344 KB |
Output is correct |
| 73 |
Correct |
214 ms |
110328 KB |
Output is correct |
| 74 |
Correct |
216 ms |
110340 KB |
Output is correct |
| 75 |
Correct |
210 ms |
110332 KB |
Output is correct |
| 76 |
Correct |
227 ms |
110540 KB |
Output is correct |
| 77 |
Correct |
239 ms |
110348 KB |
Output is correct |
| 78 |
Correct |
226 ms |
110256 KB |
Output is correct |
| 79 |
Correct |
186 ms |
110512 KB |
Output is correct |
| 80 |
Correct |
179 ms |
110284 KB |
Output is correct |
| 81 |
Correct |
181 ms |
110324 KB |
Output is correct |
| 82 |
Correct |
224 ms |
110356 KB |
Output is correct |
| 83 |
Correct |
227 ms |
110324 KB |
Output is correct |
| 84 |
Correct |
183 ms |
110344 KB |
Output is correct |
| 85 |
Correct |
229 ms |
110328 KB |
Output is correct |
| 86 |
Correct |
380 ms |
110284 KB |
Output is correct |
| 87 |
Correct |
225 ms |
110468 KB |
Output is correct |
| 88 |
Correct |
235 ms |
110348 KB |
Output is correct |
| 89 |
Correct |
277 ms |
110352 KB |
Output is correct |
| 90 |
Correct |
160 ms |
87324 KB |
Output is correct |
| 91 |
Correct |
250 ms |
110316 KB |
Output is correct |
| 92 |
Correct |
277 ms |
110340 KB |
Output is correct |
| 93 |
Correct |
377 ms |
110324 KB |
Output is correct |
| 94 |
Correct |
289 ms |
110336 KB |
Output is correct |
| 95 |
Correct |
239 ms |
110448 KB |
Output is correct |
| 96 |
Correct |
243 ms |
110340 KB |
Output is correct |
| 97 |
Correct |
397 ms |
110284 KB |
Output is correct |
| 98 |
Correct |
247 ms |
110332 KB |
Output is correct |
| 99 |
Correct |
310 ms |
110452 KB |
Output is correct |
| 100 |
Correct |
404 ms |
110248 KB |
Output is correct |
