| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 711555 |
2023-03-17T08:36:55 Z |
pavement |
Bomb (IZhO17_bomb) |
C++17 |
|
215 ms |
104748 KB |
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
#define int long long
#define mp make_pair
#define mt make_tuple
#define pb push_back
#define ppb pop_back
#define eb emplace_back
#define g0(a) get<0>(a)
#define g1(a) get<1>(a)
#define g2(a) get<2>(a)
#define g3(a) get<3>(a)
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
using db = double;
using ll = long long;
using ld = long double;
using ii = pair<int, int>;
using iii = tuple<int, int, int>;
using iiii = tuple<int, int, int, int>;
template<class key, class value = null_type, class cmp = less<key> >
using ordered_set = tree<key, value, cmp, rb_tree_tag, tree_order_statistics_node_update>;
int N, M, ans[2505], top[2505][2505], down[2505][2505];
char A[2505][2505];
main() {
ios::sync_with_stdio(0);
cin.tie(0);
cin >> N >> M;
for (int i = 1; i <= M; i++) {
ans[i] = (int)1e16;
}
for (int i = 1; i <= N; i++) {
for (int j = 1; j <= M; j++) {
cin >> A[i][j];
}
}
for (int i = 1; i <= N; i++) {
for (int j = 1; j <= M; j++) {
if (A[i][j] == '1') {
top[i][j] = (top[i - 1][j] ? top[i - 1][j] : i);
}
}
}
for (int i = N; i >= 1; i--) {
for (int j = 1; j <= M; j++) {
if (A[i][j] == '1') {
down[i][j] = (down[i + 1][j] ? down[i + 1][j] : i);
ans[1] = min(ans[1], down[i][j] - top[i][j] + 1);
}
}
}
for (int iter = 0; iter < 2; iter++) {
for (int i = 1; i <= N; i++) {
for (int l = 1, r = 1; l <= M; ) {
while (r <= M && A[i][r] == '1') r++;
if (l == r) {
l++;
r++;
continue;
}
ans[r - l + 1] = 0;
int min_top = (int)1e16, min_down = (int)1e16;
for (int j = l; j < r; j++) {
assert(A[i][j] == '1');
min_top = min(min_top, i - top[i][j] + 1);
min_down = min(min_down, down[i][j] - i + 1);
ans[j - l + 1] = min(ans[j - l + 1], min_top + min_down - 1);
}
l = r;
}
}
for (int i = 1; i <= N; i++) {
reverse(A[i] + 1, A[i] + 1 + M);
reverse(top[i] + 1, top[i] + 1 + M);
reverse(down[i] + 1, down[i] + 1 + M);
}
}
int ret = 0;
for (int i = 1; i <= M; i++) {
if (i > 1) ans[i] = min(ans[i], ans[i - 1]);
assert(ans[i] != (int)1e16);
ret = max(ret, i * ans[i]);
}
cout << ret << '\n';
}
Compilation message
bomb.cpp:29:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
29 | main() {
| ^~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
1 ms |
468 KB |
Output is correct |
| 3 |
Correct |
10 ms |
26532 KB |
Output is correct |
| 4 |
Correct |
10 ms |
26544 KB |
Output is correct |
| 5 |
Correct |
1 ms |
340 KB |
Output is correct |
| 6 |
Correct |
1 ms |
340 KB |
Output is correct |
| 7 |
Correct |
0 ms |
340 KB |
Output is correct |
| 8 |
Correct |
1 ms |
468 KB |
Output is correct |
| 9 |
Correct |
1 ms |
468 KB |
Output is correct |
| 10 |
Correct |
0 ms |
468 KB |
Output is correct |
| 11 |
Correct |
1 ms |
468 KB |
Output is correct |
| 12 |
Correct |
0 ms |
468 KB |
Output is correct |
| 13 |
Correct |
0 ms |
468 KB |
Output is correct |
| 14 |
Correct |
1 ms |
468 KB |
Output is correct |
| 15 |
Correct |
1 ms |
468 KB |
Output is correct |
| 16 |
Correct |
1 ms |
468 KB |
Output is correct |
| 17 |
Correct |
1 ms |
980 KB |
Output is correct |
| 18 |
Correct |
1 ms |
1108 KB |
Output is correct |
| 19 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 20 |
Correct |
1 ms |
1364 KB |
Output is correct |
| 21 |
Correct |
1 ms |
980 KB |
Output is correct |
| 22 |
Correct |
1 ms |
1236 KB |
Output is correct |
| 23 |
Correct |
1 ms |
1492 KB |
Output is correct |
| 24 |
Correct |
1 ms |
1236 KB |
Output is correct |
| 25 |
Correct |
1 ms |
1492 KB |
Output is correct |
| 26 |
Correct |
1 ms |
1492 KB |
Output is correct |
| 27 |
Correct |
3 ms |
4564 KB |
Output is correct |
| 28 |
Correct |
5 ms |
5076 KB |
Output is correct |
| 29 |
Correct |
6 ms |
6356 KB |
Output is correct |
| 30 |
Correct |
7 ms |
7764 KB |
Output is correct |
| 31 |
Correct |
6 ms |
6100 KB |
Output is correct |
| 32 |
Correct |
7 ms |
6996 KB |
Output is correct |
| 33 |
Correct |
9 ms |
8148 KB |
Output is correct |
| 34 |
Correct |
5 ms |
5276 KB |
Output is correct |
| 35 |
Correct |
8 ms |
8148 KB |
Output is correct |
| 36 |
Correct |
8 ms |
8148 KB |
Output is correct |
| 37 |
Correct |
1 ms |
468 KB |
Output is correct |
| 38 |
Correct |
183 ms |
104388 KB |
Output is correct |
| 39 |
Correct |
1 ms |
468 KB |
Output is correct |
| 40 |
Correct |
29 ms |
21584 KB |
Output is correct |
| 41 |
Correct |
1 ms |
468 KB |
Output is correct |
| 42 |
Correct |
1 ms |
1492 KB |
Output is correct |
| 43 |
Correct |
176 ms |
104428 KB |
Output is correct |
| 44 |
Correct |
8 ms |
8148 KB |
Output is correct |
| 45 |
Correct |
178 ms |
104492 KB |
Output is correct |
| 46 |
Correct |
173 ms |
104596 KB |
Output is correct |
| 47 |
Correct |
171 ms |
104464 KB |
Output is correct |
| 48 |
Correct |
173 ms |
104504 KB |
Output is correct |
| 49 |
Correct |
183 ms |
104396 KB |
Output is correct |
| 50 |
Correct |
170 ms |
104504 KB |
Output is correct |
| 51 |
Correct |
189 ms |
104384 KB |
Output is correct |
| 52 |
Correct |
184 ms |
104476 KB |
Output is correct |
| 53 |
Correct |
182 ms |
104524 KB |
Output is correct |
| 54 |
Correct |
177 ms |
104412 KB |
Output is correct |
| 55 |
Correct |
175 ms |
104488 KB |
Output is correct |
| 56 |
Correct |
190 ms |
104580 KB |
Output is correct |
| 57 |
Correct |
174 ms |
104408 KB |
Output is correct |
| 58 |
Correct |
173 ms |
104476 KB |
Output is correct |
| 59 |
Correct |
173 ms |
104500 KB |
Output is correct |
| 60 |
Correct |
182 ms |
104588 KB |
Output is correct |
| 61 |
Correct |
190 ms |
104504 KB |
Output is correct |
| 62 |
Correct |
176 ms |
104440 KB |
Output is correct |
| 63 |
Correct |
183 ms |
104396 KB |
Output is correct |
| 64 |
Correct |
171 ms |
104528 KB |
Output is correct |
| 65 |
Correct |
187 ms |
104396 KB |
Output is correct |
| 66 |
Correct |
172 ms |
104500 KB |
Output is correct |
| 67 |
Correct |
178 ms |
104492 KB |
Output is correct |
| 68 |
Correct |
173 ms |
104432 KB |
Output is correct |
| 69 |
Correct |
170 ms |
104476 KB |
Output is correct |
| 70 |
Correct |
121 ms |
83628 KB |
Output is correct |
| 71 |
Correct |
164 ms |
104408 KB |
Output is correct |
| 72 |
Correct |
162 ms |
104396 KB |
Output is correct |
| 73 |
Correct |
168 ms |
104504 KB |
Output is correct |
| 74 |
Correct |
162 ms |
104580 KB |
Output is correct |
| 75 |
Correct |
166 ms |
104460 KB |
Output is correct |
| 76 |
Correct |
165 ms |
104472 KB |
Output is correct |
| 77 |
Correct |
172 ms |
104396 KB |
Output is correct |
| 78 |
Correct |
191 ms |
104444 KB |
Output is correct |
| 79 |
Correct |
172 ms |
104436 KB |
Output is correct |
| 80 |
Correct |
172 ms |
104432 KB |
Output is correct |
| 81 |
Correct |
215 ms |
104440 KB |
Output is correct |
| 82 |
Correct |
187 ms |
104400 KB |
Output is correct |
| 83 |
Correct |
169 ms |
104584 KB |
Output is correct |
| 84 |
Correct |
177 ms |
104620 KB |
Output is correct |
| 85 |
Correct |
187 ms |
104524 KB |
Output is correct |
| 86 |
Correct |
183 ms |
104516 KB |
Output is correct |
| 87 |
Correct |
170 ms |
104624 KB |
Output is correct |
| 88 |
Correct |
178 ms |
104748 KB |
Output is correct |
| 89 |
Correct |
179 ms |
104524 KB |
Output is correct |
| 90 |
Correct |
125 ms |
83788 KB |
Output is correct |
| 91 |
Correct |
173 ms |
104524 KB |
Output is correct |
| 92 |
Correct |
176 ms |
104636 KB |
Output is correct |
| 93 |
Correct |
207 ms |
104632 KB |
Output is correct |
| 94 |
Correct |
183 ms |
104660 KB |
Output is correct |
| 95 |
Correct |
179 ms |
104684 KB |
Output is correct |
| 96 |
Correct |
178 ms |
104628 KB |
Output is correct |
| 97 |
Correct |
182 ms |
104540 KB |
Output is correct |
| 98 |
Correct |
191 ms |
104632 KB |
Output is correct |
| 99 |
Correct |
189 ms |
104620 KB |
Output is correct |
| 100 |
Correct |
195 ms |
104632 KB |
Output is correct |
