| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 945057 |
2024-03-13T11:03:21 Z |
atom |
Bomb (IZhO17_bomb) |
C++17 |
|
1000 ms |
131072 KB |
#include "bits/stdc++.h"
// @JASPER'S BOILERPLATE
using namespace std;
using ll = long long;
#ifdef JASPER
#include "debug.h"
#else
#define debug(...) 166
#endif
signed main() {
cin.tie(0) -> sync_with_stdio(0);
#ifdef JASPER
freopen("in1", "r", stdin);
#endif
int n, m;
cin >> n >> m;
vector <vector <int>> a(n + 5, vector <int> (m + 5, 0));
for (int i = 1; i <= n; ++i) {
for (int j = 1; j <= m; ++j) {
char x; cin >> x;
a[i][j] = x - '0';
}
}
// for (int i = 1; i <= n; ++i)
// for (int j = 1; j <= m; ++j)
// cout << a[i][j] << " \n"[j == m];
//sub1: shortest consecutive 1ss
if (n == 1 || m == 1) {
if (n == 1) {
int ans = 1e9;
for (int i = 1; i <= m; ++i) {
if (a[1][i] == 0) continue;
int cur = 0;
while (i <= m && a[1][i]) {
++cur;
++i;
}
ans = min(ans, cur);
}
cout << ans << "\n";
return 0;
}
if (m == 1) {
int ans = 1e9;
for (int i = 1; i <= n; ++i) {
if (a[i][1] == 0) continue;
int cur = 0;
while (i <= n && a[i][1]) {
++cur;
++i;
}
ans = min(ans, cur);
}
cout << ans << "\n";
return 0;
}
}
// two pointer to optimize
vector <vector <int>> lt(n + 5, vector <int> (m + 5, 0)), rt(n + 5, vector <int> (m + 5, 0));
vector <int> w(n + 5, 1e9); // ans(i) : W when H = i
for (int i = 1; i <= n; ++i) {
for (int j = 1; j <= m; ++j)
a[i][j]? lt[i][j] = (lt[i][j - 1] + 1) : 0;
for (int j = m; j >= 1; --j)
a[i][j]? rt[i][j] = (rt[i][j + 1] + 1) : 0;
for (int j = 1; j <= m; ++j)
if (a[i][j]) w[1] = min(w[1], rt[i][j] + lt[i][j] - 1);
}
// find feasible height
int min_h = 1e9; // minimum vertical strip of 1s;
for (int j = 1; j <= m; ++j) {
int k = 0; // length of consecutive 1s of current column
int l = 1e9, r = 1e9;
for (int i = 1; i <= n; ++i) {
if (a[i][j]) {
++k;
l = min(l, lt[i][j]);
r = min(r, rt[i][j]);
w[k] = min(w[k], r + l - 1);
}
else {
if (k) min_h = min(min_h, k);
l = r = 1e9;
k = 0;
}
}
}
int ans = 0;
for (int h = 1; h <= min_h; ++h) {
w[h + 1] = min(w[h + 1], w[h]); // width is bounded by the minimum horizontal strip
ans = max(ans, w[h] * h);
}
cout << ans << "\n";
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
600 KB |
Output is correct |
| 2 |
Correct |
1 ms |
348 KB |
Output is correct |
| 3 |
Correct |
1 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
344 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Incorrect |
1 ms |
344 KB |
Output isn't correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| 11 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 12 |
Correct |
0 ms |
348 KB |
Output is correct |
| 13 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 14 |
Correct |
1 ms |
348 KB |
Output is correct |
| 15 |
Correct |
0 ms |
348 KB |
Output is correct |
| 16 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 17 |
Correct |
1 ms |
348 KB |
Output is correct |
| 18 |
Correct |
1 ms |
388 KB |
Output is correct |
| 19 |
Incorrect |
1 ms |
348 KB |
Output isn't correct |
| 20 |
Correct |
0 ms |
348 KB |
Output is correct |
| 21 |
Correct |
1 ms |
344 KB |
Output is correct |
| 22 |
Correct |
0 ms |
348 KB |
Output is correct |
| 23 |
Incorrect |
1 ms |
348 KB |
Output isn't correct |
| 24 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 25 |
Correct |
1 ms |
592 KB |
Output is correct |
| 26 |
Correct |
1 ms |
344 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1372 KB |
Output is correct |
| 28 |
Correct |
2 ms |
1628 KB |
Output is correct |
| 29 |
Correct |
3 ms |
2000 KB |
Output is correct |
| 30 |
Incorrect |
4 ms |
2652 KB |
Output isn't correct |
| 31 |
Incorrect |
3 ms |
2140 KB |
Output isn't correct |
| 32 |
Incorrect |
4 ms |
2136 KB |
Output isn't correct |
| 33 |
Correct |
4 ms |
2904 KB |
Output is correct |
| 34 |
Correct |
2 ms |
1372 KB |
Output is correct |
| 35 |
Incorrect |
4 ms |
2908 KB |
Output isn't correct |
| 36 |
Correct |
5 ms |
3160 KB |
Output is correct |
| 37 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 38 |
Execution timed out |
2465 ms |
131072 KB |
Time limit exceeded |
| 39 |
Incorrect |
1 ms |
344 KB |
Output isn't correct |
| 40 |
Correct |
24 ms |
9564 KB |
Output is correct |
| 41 |
Correct |
0 ms |
348 KB |
Output is correct |
| 42 |
Correct |
1 ms |
348 KB |
Output is correct |
| 43 |
Correct |
244 ms |
74324 KB |
Output is correct |
| 44 |
Correct |
6 ms |
2904 KB |
Output is correct |
| 45 |
Incorrect |
231 ms |
74248 KB |
Output isn't correct |
| 46 |
Correct |
208 ms |
74320 KB |
Output is correct |
| 47 |
Incorrect |
227 ms |
74320 KB |
Output isn't correct |
| 48 |
Correct |
225 ms |
74404 KB |
Output is correct |
| 49 |
Correct |
278 ms |
74324 KB |
Output is correct |
| 50 |
Correct |
227 ms |
74492 KB |
Output is correct |
| 51 |
Correct |
222 ms |
74568 KB |
Output is correct |
| 52 |
Correct |
213 ms |
74320 KB |
Output is correct |
| 53 |
Correct |
225 ms |
74384 KB |
Output is correct |
| 54 |
Correct |
180 ms |
74320 KB |
Output is correct |
| 55 |
Correct |
179 ms |
74252 KB |
Output is correct |
| 56 |
Execution timed out |
2543 ms |
131072 KB |
Time limit exceeded |
| 57 |
Correct |
176 ms |
74324 KB |
Output is correct |
| 58 |
Correct |
174 ms |
74320 KB |
Output is correct |
| 59 |
Correct |
180 ms |
74324 KB |
Output is correct |
| 60 |
Correct |
212 ms |
74252 KB |
Output is correct |
| 61 |
Incorrect |
275 ms |
74384 KB |
Output isn't correct |
| 62 |
Correct |
284 ms |
74380 KB |
Output is correct |
| 63 |
Correct |
277 ms |
74384 KB |
Output is correct |
| 64 |
Correct |
174 ms |
74324 KB |
Output is correct |
| 65 |
Correct |
209 ms |
74320 KB |
Output is correct |
| 66 |
Correct |
215 ms |
74388 KB |
Output is correct |
| 67 |
Correct |
224 ms |
74324 KB |
Output is correct |
| 68 |
Correct |
235 ms |
74384 KB |
Output is correct |
| 69 |
Correct |
176 ms |
74320 KB |
Output is correct |
| 70 |
Incorrect |
87 ms |
47732 KB |
Output isn't correct |
| 71 |
Incorrect |
163 ms |
74384 KB |
Output isn't correct |
| 72 |
Correct |
176 ms |
74384 KB |
Output is correct |
| 73 |
Incorrect |
179 ms |
74384 KB |
Output isn't correct |
| 74 |
Incorrect |
174 ms |
74324 KB |
Output isn't correct |
| 75 |
Incorrect |
172 ms |
74320 KB |
Output isn't correct |
| 76 |
Correct |
181 ms |
74384 KB |
Output is correct |
| 77 |
Correct |
178 ms |
74244 KB |
Output is correct |
| 78 |
Correct |
181 ms |
74240 KB |
Output is correct |
| 79 |
Incorrect |
130 ms |
74320 KB |
Output isn't correct |
| 80 |
Incorrect |
130 ms |
74260 KB |
Output isn't correct |
| 81 |
Incorrect |
134 ms |
74320 KB |
Output isn't correct |
| 82 |
Correct |
189 ms |
74464 KB |
Output is correct |
| 83 |
Incorrect |
182 ms |
74320 KB |
Output isn't correct |
| 84 |
Incorrect |
131 ms |
74320 KB |
Output isn't correct |
| 85 |
Incorrect |
178 ms |
74324 KB |
Output isn't correct |
| 86 |
Incorrect |
270 ms |
74324 KB |
Output isn't correct |
| 87 |
Correct |
176 ms |
74384 KB |
Output is correct |
| 88 |
Incorrect |
188 ms |
74496 KB |
Output isn't correct |
| 89 |
Incorrect |
200 ms |
74320 KB |
Output isn't correct |
| 90 |
Incorrect |
109 ms |
47748 KB |
Output isn't correct |
| 91 |
Correct |
186 ms |
74324 KB |
Output is correct |
| 92 |
Correct |
206 ms |
74240 KB |
Output is correct |
| 93 |
Correct |
258 ms |
74324 KB |
Output is correct |
| 94 |
Incorrect |
206 ms |
74256 KB |
Output isn't correct |
| 95 |
Incorrect |
186 ms |
74244 KB |
Output isn't correct |
| 96 |
Incorrect |
188 ms |
74380 KB |
Output isn't correct |
| 97 |
Correct |
262 ms |
74320 KB |
Output is correct |
| 98 |
Correct |
182 ms |
74324 KB |
Output is correct |
| 99 |
Incorrect |
202 ms |
74376 KB |
Output isn't correct |
| 100 |
Incorrect |
258 ms |
74256 KB |
Output isn't correct |
