| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 915555 |
2024-01-24T07:08:24 Z |
vjudge1 |
Bomb (IZhO17_bomb) |
C++17 |
|
1000 ms |
104624 KB |
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,popcnt,lzcnt")
#include <bits/stdc++.h>
#define int long long
#define pb push_back
#define ui unsigned int
#define ld long double
#define pl pair<long long int, long long int>
#define boost ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define ff first
#define ss second
#define sz size()
#define all(x) x.begin(), x.end()
using namespace std;
const int maxn = 1e6 + 11;
const int inf = 1e17 + 1;
const int mod = 1e9 + 7;
// const int mod = 998244353;
const int dx[] = {-1, 0, 0, 1, -1, -1, 1, 1};
const int dy[] = {0, -1, 1 , 0, -1, 1, -1, 1};
const double eps = 1e-10;
int n, m;
int pr[2501][2501], p[2501][2501];
void solve() {
cin >> n >> m;
char ch[n + 1][m + 1];
int cnt = 0;
for(int i = 1; i <= n; i++) {
for(int j = 1; j <= m; j++) {
cin >> ch[ i ][ j ];
}
}
for(int i = 1; i <= n; i++) {
for(int j = 1; j <= m; j++) {
pr[ i ][ j ] = pr[i - 1][ j ] + pr[ i ][j - 1] - pr[i - 1][j - 1] + (ch[ i ][ j ] - '0');
}
}
int y = m;
int x = 1;
int ans = 0;
while(x <= n && y) {
int l = 1, r = y;
int anss = 0;
while(l <= r) {
int mid = l + r >> 1;
for(int i = 0; i <= n; i++) {
for(int j = 0; j <= m; j++) {
p[ i ][ j ] = 0;
}
}
for(int i = 0; i + x <= n; i++) {
for(int j = 0; j + mid <= m; j++) {
int c = pr[i + x][j + mid] - pr[i + x][ j ] - pr[ i ][j + mid] + pr[ i ][ j ];
if(c == x * mid) {
p[i + x + 1][j + mid + 1]++;
p[i + 1][j + mid + 1]--;
p[i + x + 1][j + 1]--;
p[i + 1][j + 1]++;
}
}
}
for(int i = 1; i <= n; i++) {
for(int j = 1; j <= m; j++) {
p[ i ][ j ] += p[i - 1][ j ] + p[ i ][j - 1] - p[i - 1][j - 1];
}
}
bool fl = true;
for(int i = 1; i <= n; i++) {
for(int j = 1; j <= m; j++) {
if(ch[ i ][ j ] == '1' && p[ i ][ j ] == 0) {
fl = false;
break;
}
}
}
if(fl) {
anss = mid;
l = mid + 1;
}
else {
r = mid - 1;
}
}
y = anss;
ans = max(ans, x * y);
x++;
}
cout << ans;
}
signed main() {
// freopen("sum.in", "r", stdin);
// freopen("sum.out", "w", stdout);
boost;
int tt = 1;
// cin >> tt;
for(int i = 1; i <= tt; i++) {
// cout << "Case " << i << ":\n";
solve();
}
}
Compilation message
bomb.cpp: In function 'void solve()':
bomb.cpp:55:25: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
55 | int mid = l + r >> 1;
| ~~^~~
bomb.cpp:35:9: warning: unused variable 'cnt' [-Wunused-variable]
35 | int cnt = 0;
| ^~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
344 KB |
Output is correct |
| 2 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 3 |
Correct |
16 ms |
57948 KB |
Output is correct |
| 4 |
Correct |
16 ms |
57948 KB |
Output is correct |
| 5 |
Correct |
1 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 9 |
Correct |
1 ms |
2392 KB |
Output is correct |
| 10 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 11 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 12 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 13 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 14 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 15 |
Correct |
1 ms |
2624 KB |
Output is correct |
| 16 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 17 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 18 |
Correct |
1 ms |
2648 KB |
Output is correct |
| 19 |
Correct |
2 ms |
2908 KB |
Output is correct |
| 20 |
Correct |
2 ms |
2908 KB |
Output is correct |
| 21 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 22 |
Correct |
1 ms |
2904 KB |
Output is correct |
| 23 |
Correct |
3 ms |
2908 KB |
Output is correct |
| 24 |
Correct |
2 ms |
2904 KB |
Output is correct |
| 25 |
Correct |
3 ms |
2908 KB |
Output is correct |
| 26 |
Correct |
3 ms |
2908 KB |
Output is correct |
| 27 |
Correct |
6 ms |
8536 KB |
Output is correct |
| 28 |
Correct |
10 ms |
8796 KB |
Output is correct |
| 29 |
Correct |
234 ms |
11376 KB |
Output is correct |
| 30 |
Correct |
79 ms |
15448 KB |
Output is correct |
| 31 |
Correct |
64 ms |
11388 KB |
Output is correct |
| 32 |
Correct |
63 ms |
11612 KB |
Output is correct |
| 33 |
Correct |
115 ms |
15452 KB |
Output is correct |
| 34 |
Correct |
9 ms |
10844 KB |
Output is correct |
| 35 |
Correct |
25 ms |
15512 KB |
Output is correct |
| 36 |
Correct |
253 ms |
15700 KB |
Output is correct |
| 37 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 38 |
Incorrect |
510 ms |
104368 KB |
Output isn't correct |
| 39 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 40 |
Execution timed out |
1054 ms |
32860 KB |
Time limit exceeded |
| 41 |
Correct |
1 ms |
2392 KB |
Output is correct |
| 42 |
Correct |
7 ms |
2904 KB |
Output is correct |
| 43 |
Incorrect |
451 ms |
104468 KB |
Output isn't correct |
| 44 |
Correct |
761 ms |
15696 KB |
Output is correct |
| 45 |
Incorrect |
443 ms |
104464 KB |
Output isn't correct |
| 46 |
Incorrect |
353 ms |
104276 KB |
Output isn't correct |
| 47 |
Incorrect |
447 ms |
104460 KB |
Output isn't correct |
| 48 |
Incorrect |
434 ms |
104476 KB |
Output isn't correct |
| 49 |
Incorrect |
509 ms |
104472 KB |
Output isn't correct |
| 50 |
Incorrect |
444 ms |
104528 KB |
Output isn't correct |
| 51 |
Incorrect |
433 ms |
104360 KB |
Output isn't correct |
| 52 |
Incorrect |
428 ms |
104464 KB |
Output isn't correct |
| 53 |
Incorrect |
423 ms |
104624 KB |
Output isn't correct |
| 54 |
Incorrect |
365 ms |
104352 KB |
Output isn't correct |
| 55 |
Incorrect |
375 ms |
104460 KB |
Output isn't correct |
| 56 |
Incorrect |
598 ms |
104352 KB |
Output isn't correct |
| 57 |
Incorrect |
379 ms |
104468 KB |
Output isn't correct |
| 58 |
Incorrect |
378 ms |
104352 KB |
Output isn't correct |
| 59 |
Incorrect |
367 ms |
104272 KB |
Output isn't correct |
| 60 |
Incorrect |
394 ms |
104460 KB |
Output isn't correct |
| 61 |
Incorrect |
505 ms |
104476 KB |
Output isn't correct |
| 62 |
Incorrect |
524 ms |
104480 KB |
Output isn't correct |
| 63 |
Incorrect |
517 ms |
104472 KB |
Output isn't correct |
| 64 |
Incorrect |
356 ms |
104368 KB |
Output isn't correct |
| 65 |
Incorrect |
426 ms |
104472 KB |
Output isn't correct |
| 66 |
Incorrect |
452 ms |
104368 KB |
Output isn't correct |
| 67 |
Incorrect |
448 ms |
104568 KB |
Output isn't correct |
| 68 |
Incorrect |
471 ms |
104532 KB |
Output isn't correct |
| 69 |
Incorrect |
379 ms |
104532 KB |
Output isn't correct |
| 70 |
Execution timed out |
1065 ms |
84756 KB |
Time limit exceeded |
| 71 |
Execution timed out |
1069 ms |
104276 KB |
Time limit exceeded |
| 72 |
Execution timed out |
1055 ms |
104276 KB |
Time limit exceeded |
| 73 |
Execution timed out |
1060 ms |
104368 KB |
Time limit exceeded |
| 74 |
Execution timed out |
1036 ms |
104276 KB |
Time limit exceeded |
| 75 |
Execution timed out |
1060 ms |
104372 KB |
Time limit exceeded |
| 76 |
Execution timed out |
1036 ms |
104352 KB |
Time limit exceeded |
| 77 |
Execution timed out |
1045 ms |
104368 KB |
Time limit exceeded |
| 78 |
Execution timed out |
1073 ms |
104276 KB |
Time limit exceeded |
| 79 |
Execution timed out |
1016 ms |
104272 KB |
Time limit exceeded |
| 80 |
Execution timed out |
1045 ms |
104364 KB |
Time limit exceeded |
| 81 |
Execution timed out |
1008 ms |
104272 KB |
Time limit exceeded |
| 82 |
Execution timed out |
1052 ms |
104368 KB |
Time limit exceeded |
| 83 |
Execution timed out |
1067 ms |
104348 KB |
Time limit exceeded |
| 84 |
Execution timed out |
1049 ms |
104356 KB |
Time limit exceeded |
| 85 |
Incorrect |
371 ms |
104272 KB |
Output isn't correct |
| 86 |
Incorrect |
511 ms |
104352 KB |
Output isn't correct |
| 87 |
Incorrect |
369 ms |
104272 KB |
Output isn't correct |
| 88 |
Execution timed out |
1018 ms |
104356 KB |
Time limit exceeded |
| 89 |
Incorrect |
414 ms |
104272 KB |
Output isn't correct |
| 90 |
Execution timed out |
1074 ms |
84820 KB |
Time limit exceeded |
| 91 |
Incorrect |
395 ms |
104612 KB |
Output isn't correct |
| 92 |
Incorrect |
416 ms |
104484 KB |
Output isn't correct |
| 93 |
Incorrect |
508 ms |
104532 KB |
Output isn't correct |
| 94 |
Incorrect |
417 ms |
104532 KB |
Output isn't correct |
| 95 |
Execution timed out |
1016 ms |
104352 KB |
Time limit exceeded |
| 96 |
Execution timed out |
1066 ms |
104368 KB |
Time limit exceeded |
| 97 |
Incorrect |
509 ms |
104476 KB |
Output isn't correct |
| 98 |
Execution timed out |
1058 ms |
104276 KB |
Time limit exceeded |
| 99 |
Incorrect |
413 ms |
104276 KB |
Output isn't correct |
| 100 |
Incorrect |
504 ms |
104480 KB |
Output isn't correct |
