oj.uz

Submission #686391

# Submission time Handle Problem Language Result Execution time Memory
686391 2023-01-25T08:48:17 Z pragmatist Bomb (IZhO17_bomb) C++17
30 / 100
 1000 ms 61704 KB 
/*
#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("O3")
#pragma GCC target ("avx2")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#pragma GCC optimize("unroll-loops")
*/

#include<bits/stdc++.h>
 
#define ld long double
#define sz(v) (int)v.size()
#define ll long long
#define pb push_back
#define x first
#define y second
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define nl "\n"

using namespace std;

const int N = (int)25e2 + 7; // make sure this is right
const int M = (int)1e6 + 7;
const int B = 351;
const int inf = (int)2e9 + 7;
const ll INF = (ll)3e18 + 7; 
const ll MOD = (ll)1e9 + 7; // make sure this is right

bool bit(int x, int i) {
	return x >> i & 1;
}

int mult(int x, int y) {
	return 1ll * x * y % MOD;
}

int sum(int x, int y) {
	x += y;
	if(x >= MOD) x -= MOD;
	return x;
}

int n, m, p[N][N], e[N][N];
char a[N][N];

int get(int x1, int y1, int x2, int y2) {
	return (p[x2][y2] - p[x1 - 1][y2] - p[x2][y1 - 1] + p[x1 - 1][y1 - 1]);
}

void solve() {
	cin >> n >> m;
	for(int i = 1; i <= n; ++i) {
		for(int j = 1; j <= m; ++j) {
			cin >> a[i][j];
			p[i][j] = p[i - 1][j] + p[i][j - 1] - p[i - 1][j - 1] + (a[i][j] == '1');
		}
	}
	int ans = 0;                      
	for(int h = 1; h <= n; ++h) {
		for(int w = 1; w <= m; ++w) {
			for(int i = 1; i <= n -	h + 1; ++i) {
				for(int j = 1; j <= m - w + 1; ++j) {
					int ii = i + h - 1, jj = j + w - 1;
					int x = get(i, j, ii, jj);
					if(x == h * w) {
						e[i][j]++;
						e[i][jj + 1]--;
						e[ii + 1][j]--;
						e[ii + 1][jj + 1]++;			
					}	
				}
			}
			for(int i = 1; i <= n; ++i) {
				for(int j = 1; j <= m; ++j) {
					e[i][j] += e[i - 1][j];
					e[i][j] += e[i][j - 1];
					e[i][j] -= e[i - 1][j - 1];
				}
			}

			bool ok = 1;
			for(int i = 1; i <= n && ok; ++i) {
				for(int j = 1; j <= m && ok; ++j) {
					if(a[i][j] == '1') {
						ok &= (e[i][j] > 0);
					}
				}
			}
			for(int i = 1; i <= n; ++i) {
				for(int j = 1; j <= m; ++j) {
					e[i][j] = 0;
				}
			}
			if(ok) ans = max(ans, h * w);
		} 
	}
	cout << ans << "\n";
}
	
signed main() {	
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	int test = 1;
	//cin >> test;
	for(int i = 1; i <= test; ++i) {
	 	//cout << "Case #" << i << ": ";
		solve();
	}
	return 0;
}

Subtask #1
30.0 / 100.0

# 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 167 ms 26540 KB Output is correct
4 Correct 160 ms 26544 KB Output is correct
5 Correct 28 ms 388 KB Output is correct
6 Correct 6 ms 332 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 2 ms 468 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 460 KB Output is correct
11 Correct 1 ms 460 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 468 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 67 ms 968 KB Output is correct
18 Correct 72 ms 1108 KB Output is correct
19 Correct 201 ms 1388 KB Output is correct
20 Correct 207 ms 1364 KB Output is correct
21 Correct 75 ms 928 KB Output is correct
22 Correct 179 ms 1180 KB Output is correct
23 Correct 341 ms 1456 KB Output is correct
24 Correct 119 ms 1236 KB Output is correct
25 Correct 345 ms 1456 KB Output is correct
26 Correct 387 ms 1464 KB Output is correct
27 Execution timed out 1076 ms 4052 KB Time limit exceeded
28 Execution timed out 1079 ms 4284 KB Time limit exceeded
29 Execution timed out 1062 ms 5460 KB Time limit exceeded
30 Execution timed out 1080 ms 6500 KB Time limit exceeded
31 Execution timed out 1072 ms 5124 KB Time limit exceeded
32 Execution timed out 1081 ms 5972 KB Time limit exceeded
33 Execution timed out 1085 ms 6740 KB Time limit exceeded
34 Execution timed out 1064 ms 4820 KB Time limit exceeded
35 Execution timed out 1083 ms 6740 KB Time limit exceeded
36 Execution timed out 1080 ms 6740 KB Time limit exceeded
37 Correct 2 ms 468 KB Output is correct
38 Execution timed out 1079 ms 61540 KB Time limit exceeded
39 Correct 1 ms 456 KB Output is correct
40 Execution timed out 1076 ms 16272 KB Time limit exceeded
41 Correct 2 ms 468 KB Output is correct
42 Correct 368 ms 1460 KB Output is correct
43 Execution timed out 1084 ms 61552 KB Time limit exceeded
44 Execution timed out 1067 ms 6740 KB Time limit exceeded
45 Execution timed out 1076 ms 61560 KB Time limit exceeded
46 Execution timed out 1072 ms 61548 KB Time limit exceeded
47 Execution timed out 1058 ms 61576 KB Time limit exceeded
48 Execution timed out 1046 ms 61604 KB Time limit exceeded
49 Execution timed out 1081 ms 61572 KB Time limit exceeded
50 Execution timed out 1052 ms 61532 KB Time limit exceeded
51 Execution timed out 1078 ms 61572 KB Time limit exceeded
52 Execution timed out 1048 ms 61572 KB Time limit exceeded
53 Execution timed out 1032 ms 61516 KB Time limit exceeded
54 Execution timed out 1078 ms 61548 KB Time limit exceeded
55 Execution timed out 1050 ms 61512 KB Time limit exceeded
56 Execution timed out 1081 ms 61508 KB Time limit exceeded
57 Execution timed out 1085 ms 61508 KB Time limit exceeded
58 Execution timed out 1084 ms 61516 KB Time limit exceeded
59 Execution timed out 1084 ms 61512 KB Time limit exceeded
60 Execution timed out 1071 ms 61592 KB Time limit exceeded
61 Execution timed out 1038 ms 61704 KB Time limit exceeded
62 Execution timed out 1071 ms 61524 KB Time limit exceeded
63 Execution timed out 1059 ms 61576 KB Time limit exceeded
64 Execution timed out 1070 ms 61704 KB Time limit exceeded
65 Execution timed out 1076 ms 61508 KB Time limit exceeded
66 Execution timed out 1060 ms 61604 KB Time limit exceeded
67 Execution timed out 1088 ms 61584 KB Time limit exceeded
68 Execution timed out 1080 ms 61516 KB Time limit exceeded
69 Execution timed out 1052 ms 61608 KB Time limit exceeded
70 Execution timed out 1083 ms 48336 KB Time limit exceeded
71 Execution timed out 1075 ms 61524 KB Time limit exceeded
72 Execution timed out 1074 ms 61540 KB Time limit exceeded
73 Execution timed out 1070 ms 61616 KB Time limit exceeded
74 Execution timed out 1038 ms 61520 KB Time limit exceeded
75 Execution timed out 1046 ms 61596 KB Time limit exceeded
76 Execution timed out 1068 ms 61584 KB Time limit exceeded
77 Execution timed out 1047 ms 61560 KB Time limit exceeded
78 Execution timed out 1075 ms 61500 KB Time limit exceeded
79 Execution timed out 1076 ms 61516 KB Time limit exceeded
80 Execution timed out 1069 ms 61576 KB Time limit exceeded
81 Execution timed out 1069 ms 61564 KB Time limit exceeded
82 Execution timed out 1088 ms 61544 KB Time limit exceeded
83 Execution timed out 1081 ms 61516 KB Time limit exceeded
84 Execution timed out 1074 ms 61604 KB Time limit exceeded
85 Execution timed out 1072 ms 61612 KB Time limit exceeded
86 Execution timed out 1082 ms 61516 KB Time limit exceeded
87 Execution timed out 1078 ms 61516 KB Time limit exceeded
88 Execution timed out 1069 ms 61604 KB Time limit exceeded
89 Execution timed out 1077 ms 61608 KB Time limit exceeded
90 Execution timed out 1086 ms 48304 KB Time limit exceeded
91 Execution timed out 1060 ms 61552 KB Time limit exceeded
92 Execution timed out 1074 ms 61588 KB Time limit exceeded
93 Execution timed out 1077 ms 61516 KB Time limit exceeded
94 Execution timed out 1036 ms 61652 KB Time limit exceeded
95 Execution timed out 1084 ms 61552 KB Time limit exceeded
96 Execution timed out 1087 ms 61532 KB Time limit exceeded
97 Execution timed out 1061 ms 61644 KB Time limit exceeded
98 Execution timed out 1059 ms 61592 KB Time limit exceeded
99 Execution timed out 1056 ms 61528 KB Time limit exceeded
100 Execution timed out 1064 ms 61552 KB Time limit exceeded