| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 334693 |
2020-12-09T19:26:54 Z |
limabeans |
Bomb (IZhO17_bomb) |
C++17 |
|
445 ms |
76012 KB |
#include <bits/stdc++.h>
using namespace std;
template<typename T>
void out(T x) { cout << x << endl; exit(0); }
#define watch(x) cout << (#x) << " is " << (x) << endl
const int maxn = 2555;
const int inf = 1e9;
int n,m;
int a[maxn][maxn];
int up[maxn][maxn], dw[maxn][maxn];
int main() {
ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
cin>>n>>m;
for (int i=0; i<n; i++) {
string s;
cin>>s;
for (int j=0; j<m; j++) {
a[i][j]=int(s[j]-'0');
}
}
for (int j=0; j<m; j++) {
for (int i=0; i<n; i++) {
if (a[i][j]==1) {
up[i][j]=1;
if (i>0) up[i][j]+=up[i-1][j];
}
}
for (int i=n-1; i>=0; i--) {
if (a[i][j]==1) {
dw[i][j]=1;
dw[i][j]+=dw[i+1][j];
}
}
}
int minW = inf;
int minH = inf;
for (int j=0; j<m; j++) {
int cur = 0;
for (int i=0; i<n; i++) {
if (a[i][j]==1) {
cur++;
} else {
if (cur>0) minH=min(minH,cur);
cur=0;
}
}
if (cur>0) minH=min(minH,cur);
}
for (int i=0; i<n; i++) {
int cur = 0;
for (int j=0; j<m; j++) {
if (a[i][j]) {
cur++;
} else {
if (cur>0) minW=min(minW,cur);
cur=0;
}
}
if (cur>0) minW=min(minW,cur);
}
// watch(minW);
// watch(minH);
vector<int> dp(maxn+10, minH); //dp[w]: given width w, what's feasible height h for rectangle hxw
// left to right
for (int i=0; i<n; i++) {
int u=inf;
int d=inf;
int col=0;
for (int j=0; j<m; j++) {
if (a[i][j]==1) {
u=min(u,up[i][j]);
d=min(d,dw[i][j]);
++col;
dp[col]=min(dp[col],u+d-1);
} else {
u=d=inf;
col=0;
}
}
}
// right to left
for (int i=0; i<n; i++) {
int u=inf;
int d=inf;
int col=0;
for (int j=m-1; j>=0; j--) {
if (a[i][j]==1) {
u=min(u,up[i][j]);
d=min(d,dw[i][j]);
++col;
dp[col]=min(dp[col],u+d-1);
} else {
u=d=inf;
col=0;
}
}
}
int res = dp[1];
for (int i=2; i<=minW; i++) {
dp[i]=min(dp[i],dp[i-1]);
res=max(res,i*dp[i]);
}
cout<<res<<endl;
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Correct |
1 ms |
492 KB |
Output is correct |
| 3 |
Correct |
16 ms |
30444 KB |
Output is correct |
| 4 |
Correct |
17 ms |
30572 KB |
Output is correct |
| 5 |
Correct |
1 ms |
364 KB |
Output is correct |
| 6 |
Correct |
1 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
1 ms |
492 KB |
Output is correct |
| 9 |
Correct |
1 ms |
492 KB |
Output is correct |
| 10 |
Correct |
1 ms |
492 KB |
Output is correct |
| 11 |
Correct |
1 ms |
620 KB |
Output is correct |
| 12 |
Correct |
1 ms |
492 KB |
Output is correct |
| 13 |
Correct |
1 ms |
492 KB |
Output is correct |
| 14 |
Correct |
1 ms |
492 KB |
Output is correct |
| 15 |
Correct |
1 ms |
492 KB |
Output is correct |
| 16 |
Correct |
1 ms |
620 KB |
Output is correct |
| 17 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 18 |
Correct |
1 ms |
1004 KB |
Output is correct |
| 19 |
Correct |
1 ms |
1260 KB |
Output is correct |
| 20 |
Correct |
1 ms |
1260 KB |
Output is correct |
| 21 |
Correct |
1 ms |
748 KB |
Output is correct |
| 22 |
Correct |
1 ms |
1004 KB |
Output is correct |
| 23 |
Correct |
1 ms |
1260 KB |
Output is correct |
| 24 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 25 |
Correct |
1 ms |
1516 KB |
Output is correct |
| 26 |
Correct |
1 ms |
1644 KB |
Output is correct |
| 27 |
Correct |
5 ms |
4844 KB |
Output is correct |
| 28 |
Correct |
3 ms |
2412 KB |
Output is correct |
| 29 |
Correct |
7 ms |
6380 KB |
Output is correct |
| 30 |
Correct |
6 ms |
5740 KB |
Output is correct |
| 31 |
Correct |
4 ms |
4332 KB |
Output is correct |
| 32 |
Correct |
5 ms |
5484 KB |
Output is correct |
| 33 |
Correct |
7 ms |
6892 KB |
Output is correct |
| 34 |
Correct |
3 ms |
2796 KB |
Output is correct |
| 35 |
Correct |
4 ms |
3820 KB |
Output is correct |
| 36 |
Correct |
12 ms |
8428 KB |
Output is correct |
| 37 |
Correct |
1 ms |
620 KB |
Output is correct |
| 38 |
Correct |
439 ms |
75884 KB |
Output is correct |
| 39 |
Correct |
1 ms |
620 KB |
Output is correct |
| 40 |
Correct |
54 ms |
20204 KB |
Output is correct |
| 41 |
Correct |
1 ms |
620 KB |
Output is correct |
| 42 |
Correct |
2 ms |
1644 KB |
Output is correct |
| 43 |
Correct |
378 ms |
71276 KB |
Output is correct |
| 44 |
Correct |
8 ms |
7788 KB |
Output is correct |
| 45 |
Correct |
370 ms |
72556 KB |
Output is correct |
| 46 |
Correct |
362 ms |
75884 KB |
Output is correct |
| 47 |
Correct |
369 ms |
72812 KB |
Output is correct |
| 48 |
Correct |
352 ms |
76012 KB |
Output is correct |
| 49 |
Correct |
445 ms |
75756 KB |
Output is correct |
| 50 |
Correct |
362 ms |
75756 KB |
Output is correct |
| 51 |
Correct |
366 ms |
75772 KB |
Output is correct |
| 52 |
Correct |
360 ms |
75780 KB |
Output is correct |
| 53 |
Correct |
359 ms |
74988 KB |
Output is correct |
| 54 |
Correct |
298 ms |
61932 KB |
Output is correct |
| 55 |
Correct |
294 ms |
60012 KB |
Output is correct |
| 56 |
Correct |
443 ms |
75756 KB |
Output is correct |
| 57 |
Correct |
286 ms |
54648 KB |
Output is correct |
| 58 |
Correct |
294 ms |
59884 KB |
Output is correct |
| 59 |
Correct |
298 ms |
56556 KB |
Output is correct |
| 60 |
Correct |
344 ms |
67692 KB |
Output is correct |
| 61 |
Correct |
444 ms |
75884 KB |
Output is correct |
| 62 |
Correct |
440 ms |
75756 KB |
Output is correct |
| 63 |
Correct |
442 ms |
76012 KB |
Output is correct |
| 64 |
Correct |
313 ms |
58692 KB |
Output is correct |
| 65 |
Correct |
347 ms |
74604 KB |
Output is correct |
| 66 |
Correct |
359 ms |
70636 KB |
Output is correct |
| 67 |
Correct |
367 ms |
75756 KB |
Output is correct |
| 68 |
Correct |
377 ms |
75756 KB |
Output is correct |
| 69 |
Correct |
286 ms |
54380 KB |
Output is correct |
| 70 |
Correct |
160 ms |
30744 KB |
Output is correct |
| 71 |
Correct |
260 ms |
47468 KB |
Output is correct |
| 72 |
Correct |
281 ms |
53100 KB |
Output is correct |
| 73 |
Correct |
287 ms |
53356 KB |
Output is correct |
| 74 |
Correct |
284 ms |
54892 KB |
Output is correct |
| 75 |
Correct |
288 ms |
56428 KB |
Output is correct |
| 76 |
Correct |
299 ms |
57964 KB |
Output is correct |
| 77 |
Correct |
300 ms |
58348 KB |
Output is correct |
| 78 |
Correct |
307 ms |
58540 KB |
Output is correct |
| 79 |
Correct |
218 ms |
31084 KB |
Output is correct |
| 80 |
Correct |
216 ms |
32236 KB |
Output is correct |
| 81 |
Correct |
223 ms |
32620 KB |
Output is correct |
| 82 |
Correct |
304 ms |
61036 KB |
Output is correct |
| 83 |
Correct |
300 ms |
61164 KB |
Output is correct |
| 84 |
Correct |
213 ms |
26348 KB |
Output is correct |
| 85 |
Correct |
297 ms |
60140 KB |
Output is correct |
| 86 |
Correct |
421 ms |
74604 KB |
Output is correct |
| 87 |
Correct |
289 ms |
58860 KB |
Output is correct |
| 88 |
Correct |
300 ms |
59884 KB |
Output is correct |
| 89 |
Correct |
339 ms |
69228 KB |
Output is correct |
| 90 |
Correct |
191 ms |
45036 KB |
Output is correct |
| 91 |
Correct |
319 ms |
63980 KB |
Output is correct |
| 92 |
Correct |
337 ms |
66284 KB |
Output is correct |
| 93 |
Correct |
416 ms |
73836 KB |
Output is correct |
| 94 |
Correct |
336 ms |
68076 KB |
Output is correct |
| 95 |
Correct |
301 ms |
61292 KB |
Output is correct |
| 96 |
Correct |
304 ms |
61164 KB |
Output is correct |
| 97 |
Correct |
417 ms |
74476 KB |
Output is correct |
| 98 |
Correct |
302 ms |
61020 KB |
Output is correct |
| 99 |
Correct |
332 ms |
67564 KB |
Output is correct |
| 100 |
Correct |
413 ms |
73452 KB |
Output is correct |
