| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 423299 |
2021-06-10T23:04:55 Z |
antimirage |
Bomb (IZhO17_bomb) |
C++14 |
|
963 ms |
75104 KB |
/*
* let's for fixed width X find the maximum valid height Y, denote it by ans[X].
* upper bound of Y for every X is ans[1].
*
*/
#include <iostream>
#include <vector>
#include <algorithm>
#include <assert.h>
using namespace std;
int main() {
int n, m, res = 0;
cin >> n >> m;
vector <vector <int>> a(n + 5, vector<int>(m + 5, 0));
for (int i = 1; i <= n; i++) {
scanf("\n");
for (int j = 1; j <= m; j++) {
char ch;
scanf("%c", &ch);
a[i][j] = ch - 48;
}
}
vector <vector <int>> up(n + 5, vector<int>(m + 5, 0));
vector <vector <int>> dn(n + 5, vector<int>(m + 5, 0));
for (int j = 1; j <= m; j++) {
for (int i = 1; i <= n; i++) {
up[i][j] = a[i][j] ? up[i - 1][j] + 1 : 0;
}
for (int i = n; i >= 1; i--) {
dn[i][j] = a[i][j] ? dn[i + 1][j] + 1 : 0;
}
}
vector <int> ans(m + 5, n);
for (int t = 0; t < 2; t++) {
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= m; j++) {
if (a[i][j])
ans[1] = min(ans[1], up[i][j] + dn[i][j] - 1);
}
for (int j = 1; j <= m; j++) {
if (a[i][j] && !a[i][j - 1]) {
int min_d = n, min_u = n, k;
for (k = j; k <= m && a[i][k]; k++) {
min_d = min(min_d, dn[i][k]);
min_u = min(min_u, up[i][k]);
ans[k - j + 1] = min(ans[k - j + 1], min_d + min_u - 1);
}
ans[k - j + 1] = 0;
}
}
}
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= m; j++) {
swap(a[i][j], a[i][m - j + 1]);
swap(up[i][j], up[i][m - j + 1]);
swap(dn[i][j], dn[i][m - j + 1]);
}
}
}
for (int i = 1; i <= m; i++) {
ans[i] = min(ans[i], ans[i - 1]);
res = max(res, i * ans[i]);
//cout << i << " --> " << ans[i] << endl;
}
cout << res << endl;
}
Compilation message
bomb.cpp: In function 'int main()':
bomb.cpp:18:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
18 | scanf("\n");
| ~~~~~^~~~~~
bomb.cpp:21:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
21 | scanf("%c", &ch);
| ~~~~~^~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
204 KB |
Output is correct |
| 2 |
Correct |
1 ms |
204 KB |
Output is correct |
| 3 |
Correct |
2 ms |
588 KB |
Output is correct |
| 4 |
Correct |
2 ms |
716 KB |
Output is correct |
| 5 |
Correct |
1 ms |
460 KB |
Output is correct |
| 6 |
Correct |
1 ms |
332 KB |
Output is correct |
| 7 |
Correct |
1 ms |
204 KB |
Output is correct |
| 8 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
| 9 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
| 10 |
Correct |
1 ms |
204 KB |
Output is correct |
| 11 |
Correct |
1 ms |
204 KB |
Output is correct |
| 12 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
| 13 |
Correct |
1 ms |
204 KB |
Output is correct |
| 14 |
Correct |
1 ms |
204 KB |
Output is correct |
| 15 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
| 16 |
Correct |
1 ms |
204 KB |
Output is correct |
| 17 |
Correct |
1 ms |
332 KB |
Output is correct |
| 18 |
Correct |
1 ms |
332 KB |
Output is correct |
| 19 |
Incorrect |
2 ms |
292 KB |
Output isn't correct |
| 20 |
Incorrect |
1 ms |
332 KB |
Output isn't correct |
| 21 |
Correct |
1 ms |
332 KB |
Output is correct |
| 22 |
Correct |
1 ms |
332 KB |
Output is correct |
| 23 |
Incorrect |
2 ms |
432 KB |
Output isn't correct |
| 24 |
Incorrect |
1 ms |
332 KB |
Output isn't correct |
| 25 |
Incorrect |
2 ms |
332 KB |
Output isn't correct |
| 26 |
Correct |
2 ms |
332 KB |
Output is correct |
| 27 |
Correct |
10 ms |
1344 KB |
Output is correct |
| 28 |
Incorrect |
11 ms |
1740 KB |
Output isn't correct |
| 29 |
Incorrect |
14 ms |
1868 KB |
Output isn't correct |
| 30 |
Incorrect |
21 ms |
2760 KB |
Output isn't correct |
| 31 |
Correct |
15 ms |
2220 KB |
Output is correct |
| 32 |
Incorrect |
16 ms |
2372 KB |
Output isn't correct |
| 33 |
Incorrect |
24 ms |
2852 KB |
Output isn't correct |
| 34 |
Incorrect |
9 ms |
1356 KB |
Output isn't correct |
| 35 |
Incorrect |
21 ms |
2976 KB |
Output isn't correct |
| 36 |
Correct |
21 ms |
2980 KB |
Output is correct |
| 37 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
| 38 |
Correct |
963 ms |
74992 KB |
Output is correct |
| 39 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
| 40 |
Correct |
109 ms |
10304 KB |
Output is correct |
| 41 |
Correct |
1 ms |
204 KB |
Output is correct |
| 42 |
Correct |
2 ms |
332 KB |
Output is correct |
| 43 |
Correct |
855 ms |
74984 KB |
Output is correct |
| 44 |
Correct |
23 ms |
2892 KB |
Output is correct |
| 45 |
Incorrect |
883 ms |
75008 KB |
Output isn't correct |
| 46 |
Correct |
877 ms |
74988 KB |
Output is correct |
| 47 |
Incorrect |
881 ms |
74988 KB |
Output isn't correct |
| 48 |
Correct |
861 ms |
74984 KB |
Output is correct |
| 49 |
Correct |
892 ms |
74988 KB |
Output is correct |
| 50 |
Correct |
924 ms |
75076 KB |
Output is correct |
| 51 |
Correct |
874 ms |
74972 KB |
Output is correct |
| 52 |
Correct |
914 ms |
74984 KB |
Output is correct |
| 53 |
Correct |
885 ms |
74988 KB |
Output is correct |
| 54 |
Correct |
878 ms |
74988 KB |
Output is correct |
| 55 |
Incorrect |
859 ms |
74984 KB |
Output isn't correct |
| 56 |
Correct |
899 ms |
75104 KB |
Output is correct |
| 57 |
Incorrect |
862 ms |
75096 KB |
Output isn't correct |
| 58 |
Correct |
888 ms |
74988 KB |
Output is correct |
| 59 |
Correct |
796 ms |
74984 KB |
Output is correct |
| 60 |
Correct |
806 ms |
74988 KB |
Output is correct |
| 61 |
Correct |
834 ms |
75000 KB |
Output is correct |
| 62 |
Correct |
834 ms |
74948 KB |
Output is correct |
| 63 |
Correct |
851 ms |
75076 KB |
Output is correct |
| 64 |
Correct |
847 ms |
74968 KB |
Output is correct |
| 65 |
Correct |
826 ms |
75100 KB |
Output is correct |
| 66 |
Correct |
825 ms |
74992 KB |
Output is correct |
| 67 |
Correct |
815 ms |
74860 KB |
Output is correct |
| 68 |
Correct |
858 ms |
74776 KB |
Output is correct |
| 69 |
Correct |
818 ms |
74944 KB |
Output is correct |
| 70 |
Incorrect |
499 ms |
48324 KB |
Output isn't correct |
| 71 |
Incorrect |
795 ms |
74868 KB |
Output isn't correct |
| 72 |
Incorrect |
801 ms |
74860 KB |
Output isn't correct |
| 73 |
Correct |
806 ms |
74948 KB |
Output is correct |
| 74 |
Incorrect |
788 ms |
74824 KB |
Output isn't correct |
| 75 |
Incorrect |
790 ms |
74884 KB |
Output isn't correct |
| 76 |
Incorrect |
804 ms |
74840 KB |
Output isn't correct |
| 77 |
Incorrect |
799 ms |
74844 KB |
Output isn't correct |
| 78 |
Incorrect |
828 ms |
74864 KB |
Output isn't correct |
| 79 |
Incorrect |
785 ms |
74696 KB |
Output isn't correct |
| 80 |
Incorrect |
781 ms |
74848 KB |
Output isn't correct |
| 81 |
Incorrect |
839 ms |
74732 KB |
Output isn't correct |
| 82 |
Incorrect |
809 ms |
74732 KB |
Output isn't correct |
| 83 |
Incorrect |
792 ms |
74732 KB |
Output isn't correct |
| 84 |
Incorrect |
799 ms |
74820 KB |
Output isn't correct |
| 85 |
Incorrect |
800 ms |
74820 KB |
Output isn't correct |
| 86 |
Incorrect |
874 ms |
74836 KB |
Output isn't correct |
| 87 |
Incorrect |
789 ms |
74852 KB |
Output isn't correct |
| 88 |
Correct |
788 ms |
74836 KB |
Output is correct |
| 89 |
Correct |
806 ms |
74728 KB |
Output is correct |
| 90 |
Incorrect |
504 ms |
48200 KB |
Output isn't correct |
| 91 |
Incorrect |
821 ms |
74600 KB |
Output isn't correct |
| 92 |
Incorrect |
791 ms |
74608 KB |
Output isn't correct |
| 93 |
Incorrect |
826 ms |
74604 KB |
Output isn't correct |
| 94 |
Correct |
828 ms |
74824 KB |
Output is correct |
| 95 |
Incorrect |
819 ms |
74692 KB |
Output isn't correct |
| 96 |
Correct |
796 ms |
74580 KB |
Output is correct |
| 97 |
Incorrect |
833 ms |
74564 KB |
Output isn't correct |
| 98 |
Incorrect |
800 ms |
74604 KB |
Output isn't correct |
| 99 |
Incorrect |
804 ms |
74604 KB |
Output isn't correct |
| 100 |
Incorrect |
836 ms |
74632 KB |
Output isn't correct |
