Submission #556160

# Submission time Handle Problem Language Result Execution time Memory
556160 2022-05-02T14:11:19 Z ngpin04 Bomb (IZhO17_bomb) C++14
90 / 100
274 ms 74444 KB
#include <bits/stdc++.h>
#define fi first
#define se second
#define mp make_pair
#define TASK ""
#define ALL(x) (x).begin(), (x).end() 
using namespace std;
template <typename T1, typename T2> bool mini(T1 &a, T2 b) {
	if (a > b) {a = b; return true;} return false;
}
template <typename T1, typename T2> bool maxi(T1 &a, T2 b) {
	if (a < b) {a = b; return true;} return false;
}
const int N = 2505;
const int oo = 1e9;
const long long ooo = 1e18;
const int mod = 1e9 + 7; // 998244353;
const long double pi = acos(-1);

int up[N][N];
int dn[N][N];
int a[N][N];
int mx[N];
int n,m;

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	#ifdef ONLINE_JUDGE
	// freopen(TASK".inp","r",stdin);
	// freopen(TASK".out","w",stdout);
	#endif
	cin >> n >> m;
	for (int i = 1; i <= n; i++) {
		string str; cin >> str;
		for (int j = 1; j <= m; j++)
			a[i][j] = str[j - 1] - '0';
	}	

	for (int j = 1; j <= m; j++) {
		for (int i = 1; i <= n; i++) 
			if (a[i][j])
				up[i][j] = up[i - 1][j] + 1;

		for (int i = n; i >= 1; i--)
			if (a[i][j])
				dn[i][j] = dn[i + 1][j] + 1;
	}

	for (int i = 1; i <= m; i++)
		mx[i] = oo;

	for (int i = 1; i <= n; i++) 
	for (int t = 0; t < 2; t++) {

		for (int j = 1; j <= m; j++) if (a[i][j]) {
			int k = j;
			while (a[i][k])
				k++;

			int f = oo, g = oo;
			for (int it = j; it < k; it++) {
				mini(f, up[i][it]);
				mini(g, dn[i][it]);

				// cerr << i << " " << j << " " << it << " " << f << " " << g << "\n";
				mini(mx[it - j + 1], f + g - 1);
			}

			mini(mx[k - j + 1], 0);
			j = k;
		}

		reverse(a[i] + 1, a[i] + m + 1);
		reverse(dn[i] + 1, dn[i] + m + 1);
		reverse(up[i] + 1, up[i] + m + 1);
	}
	
	int ans = 0;
	for (int i = 1; i <= m; i++) {
		if (i > 1)
			mini(mx[i], mx[i - 1]);
		maxi(ans, i * mx[i]);
	}

	cout << ans;
	return 0;
}
# 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 11 ms 30420 KB Output is correct
4 Correct 12 ms 30420 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Incorrect 1 ms 340 KB Output isn't correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 456 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 1 ms 1108 KB Output is correct
18 Correct 1 ms 1236 KB Output is correct
19 Correct 1 ms 1492 KB Output is correct
20 Correct 1 ms 1492 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 1620 KB Output is correct
24 Correct 1 ms 1364 KB Output is correct
25 Correct 1 ms 1624 KB Output is correct
26 Incorrect 1 ms 1620 KB Output isn't correct
27 Incorrect 4 ms 4820 KB Output isn't correct
28 Correct 3 ms 5204 KB Output is correct
29 Correct 5 ms 6612 KB Output is correct
30 Correct 6 ms 7876 KB Output is correct
31 Correct 4 ms 6156 KB Output is correct
32 Correct 5 ms 7128 KB Output is correct
33 Correct 6 ms 8276 KB Output is correct
34 Correct 4 ms 5580 KB Output is correct
35 Correct 6 ms 8276 KB Output is correct
36 Incorrect 7 ms 8276 KB Output isn't correct
37 Correct 1 ms 468 KB Output is correct
38 Correct 242 ms 74328 KB Output is correct
39 Correct 1 ms 468 KB Output is correct
40 Correct 36 ms 20088 KB Output is correct
41 Correct 1 ms 468 KB Output is correct
42 Correct 2 ms 1616 KB Output is correct
43 Correct 217 ms 74152 KB Output is correct
44 Correct 6 ms 8276 KB Output is correct
45 Correct 216 ms 74184 KB Output is correct
46 Correct 216 ms 74316 KB Output is correct
47 Correct 218 ms 74284 KB Output is correct
48 Correct 213 ms 74332 KB Output is correct
49 Incorrect 273 ms 74272 KB Output isn't correct
50 Correct 215 ms 74248 KB Output is correct
51 Correct 216 ms 74272 KB Output is correct
52 Correct 209 ms 74188 KB Output is correct
53 Correct 214 ms 74180 KB Output is correct
54 Correct 167 ms 74236 KB Output is correct
55 Correct 170 ms 74316 KB Output is correct
56 Correct 274 ms 74188 KB Output is correct
57 Correct 176 ms 74220 KB Output is correct
58 Correct 167 ms 74244 KB Output is correct
59 Correct 167 ms 74304 KB Output is correct
60 Incorrect 195 ms 74172 KB Output isn't correct
61 Incorrect 265 ms 74224 KB Output isn't correct
62 Incorrect 261 ms 74276 KB Output isn't correct
63 Incorrect 263 ms 74188 KB Output isn't correct
64 Incorrect 173 ms 74268 KB Output isn't correct
65 Correct 195 ms 74224 KB Output is correct
66 Correct 213 ms 74168 KB Output is correct
67 Correct 226 ms 74312 KB Output is correct
68 Correct 223 ms 74280 KB Output is correct
69 Correct 174 ms 74180 KB Output is correct
70 Correct 102 ms 59432 KB Output is correct
71 Correct 154 ms 74336 KB Output is correct
72 Correct 169 ms 74188 KB Output is correct
73 Correct 171 ms 74264 KB Output is correct
74 Correct 185 ms 74176 KB Output is correct
75 Correct 174 ms 74220 KB Output is correct
76 Correct 173 ms 74188 KB Output is correct
77 Correct 174 ms 74160 KB Output is correct
78 Correct 188 ms 74212 KB Output is correct
79 Correct 130 ms 74172 KB Output is correct
80 Correct 131 ms 74196 KB Output is correct
81 Correct 138 ms 74236 KB Output is correct
82 Correct 172 ms 74216 KB Output is correct
83 Correct 173 ms 74272 KB Output is correct
84 Correct 126 ms 74244 KB Output is correct
85 Correct 165 ms 74204 KB Output is correct
86 Correct 237 ms 74188 KB Output is correct
87 Correct 162 ms 74176 KB Output is correct
88 Correct 175 ms 74172 KB Output is correct
89 Correct 188 ms 74276 KB Output is correct
90 Correct 110 ms 59384 KB Output is correct
91 Correct 188 ms 74272 KB Output is correct
92 Correct 192 ms 74248 KB Output is correct
93 Correct 247 ms 74212 KB Output is correct
94 Correct 193 ms 74228 KB Output is correct
95 Correct 193 ms 74196 KB Output is correct
96 Correct 177 ms 74312 KB Output is correct
97 Correct 254 ms 74160 KB Output is correct
98 Correct 184 ms 74272 KB Output is correct
99 Correct 188 ms 74444 KB Output is correct
100 Correct 244 ms 74348 KB Output is correct