Submission #93251

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
93251	2019-01-07T11:01:39 Z	Abelyan	Bomb (IZhO17_bomb)	C++17	99 / 100	206 ms	60228 KB

bomb

#include <iostream>
#include <algorithm>
#include <climits>
#include <cassert>
using namespace std;

typedef long long ll;
typedef long double ld;

#define fr first
#define sc second
#define FOR(i, a) for (int i = 0; i < (a); i++)
#define F0R(i, a, b) for (int i = (a); i <= (b); i++)
#define FORd(i,a) for (int i = (a)-1; i >= 0; i--)
#define F0Rd(i,a,b) for (int i = (b); i >= (a); i--)
#define trav(a, x) for (auto& a : x)

const int N = 2506;
char c[N][N];
int prdz[N][N], praj[N][N], ans1, ans2, pr[N];

void ad(int a, int b){
	if (a > ans2)return;
	if (b > ans1)b = ans1;
	pr[a] = min(pr[a], b);
}

int main(){
	ios_base::sync_with_stdio(false);
	//freopen("tests/01", "r", stdin);
	int n, m;
	cin >> n >> m;
	//assert(n == 1 && m == 20);
	for (int i = 0; i<n; i++){
		//if (i == 56)cout << "hi" << endl;
		cin >> c[i];
		pr[i] = INT_MAX;
	}
	pr[n] = INT_MAX;
	int mn = INT_MAX;
	for (int i = 0; i<n; i++){
		int tv = 0;
		for (int j = 0; j<m; j++){
			if (c[i][j] == '1'){
				if (j == 0)prdz[i][j] = 1;
				else prdz[i][j] = prdz[i][j - 1] + 1;
				tv++;
			}
			else if (tv != 0){
				mn = min(mn, tv);
				tv = 0;
			}
		}
		for (int j = m - 1; j >= 0; j--){
			if (c[i][j] == '1'){
				praj[i][j] = praj[i][j + 1] + 1;
			}
		}
		//if (tv == 3)cout <<i<< endl;
		if (tv != 0)mn = min(mn, tv);
	}
	ans1 = mn;
	mn = INT_MAX;
	for (int j = 0; j<m; j++){
		int tv = 0;
		for (int i = 0; i<n; i++){
			if (c[i][j] == '1'){
				tv++;
			}
			else if (tv != 0){
				mn = min(mn, tv);
				tv = 0;
			}
		}
		if (tv != 0)mn = min(mn, tv);
	}
	ans2 = mn;
	//cout << ans1 << " " << ans2 << endl;
	//cout << c[31] << endl;
	for (int j = 0; j < m; j++){
		for (int i = 0; i < n; i++){
			if (c[i][j] == '1' && (j == 0 || c[i][j - 1] == '0') && (i == 0 || c[i - 1][j] == '0')){
				int ans = INT_MAX, k = 0;
				while (i<n && c[i][j] == '1'){
					k++;
					ans = min(ans, praj[i][j]);
					//if (ans == 1 && k<=3)cout << i << " " << j << " " << praj[i][j] << " " << k << endl;
					ad(k, ans);
					i++;
				}
				i--;
			}
			else if (c[i][j] == '1' && (j == m - 1 || c[i][j + 1] == '0') && (i == 0 || c[i - 1][j] == '0')){
				int ans = INT_MAX, k = 0;
				while (i<n && c[i][j] == '1'){
					k++;
					ans = min(ans, prdz[i][j]);
					//if (ans == 1 && k<=3)cout << i << " " << j << " " << praj[i][j] << " " << k << endl;
					ad(k, ans);
					i++;
				}
				i--;
			}
		}
	}
	for (int j = 0; j<m; j++){
		for (int i = n - 1; i >= 0; i--){
			if (c[i][j] == '1' && (j == 0 || c[i][j - 1] == '0') && (i == n - 1 || c[i + 1][j] == '0')){
				int ans = INT_MAX, k = 0;
				while (i>=0 && c[i][j] == '1'){
					k++;
					ans = min(ans, praj[i][j]);
					//if (ans == 1 && k<=3)cout << i << " " << j << " " << praj[i][j] << " " << k << endl;
					ad(k, ans);
					i--;
				}
				i++;
			}
			else if (c[i][j] == '1' && (j == m - 1 || c[i][j + 1] == '0') && (i==n-1 || c[i+1][j]=='0')){
				int ans = INT_MAX, k = 0;
				while (i>=0 && c[i][j] == '1'){
					k++;
					ans = min(ans, prdz[i][j]);
					//if (ans == 1 && k<=3)cout << i << " " << j << " " << praj[i][j] << " " << k << endl;
					ad(k, ans);
					i--;
				}
				i++;
			}
		}
	}
	int verj = 1;
	for (int i = 1; i <= n; i++){
		if (pr[i] == INT_MAX)continue;
		verj = max(verj, i*pr[i]);
		//cout << pr[i] << endl;
	}
	cout << verj << endl;
	return 0;
}
/*
5 6
001000
111110
111110
111110
000100
*/

Subtask #1

99.0 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	376 KB	Output is correct
2	Correct	2 ms	504 KB	Output is correct
3	Correct	24 ms	26488 KB	Output is correct
4	Correct	23 ms	26616 KB	Output is correct
5	Correct	2 ms	420 KB	Output is correct
6	Correct	2 ms	376 KB	Output is correct
7	Correct	2 ms	376 KB	Output is correct
8	Correct	2 ms	504 KB	Output is correct
9	Correct	2 ms	508 KB	Output is correct
10	Correct	2 ms	504 KB	Output is correct
11	Correct	2 ms	504 KB	Output is correct
12	Correct	2 ms	504 KB	Output is correct
13	Correct	2 ms	504 KB	Output is correct
14	Correct	2 ms	504 KB	Output is correct
15	Correct	2 ms	504 KB	Output is correct
16	Correct	2 ms	504 KB	Output is correct
17	Correct	3 ms	1016 KB	Output is correct
18	Correct	2 ms	888 KB	Output is correct
19	Correct	2 ms	1016 KB	Output is correct
20	Correct	3 ms	1016 KB	Output is correct
21	Correct	2 ms	632 KB	Output is correct
22	Correct	2 ms	888 KB	Output is correct
23	Correct	2 ms	1016 KB	Output is correct
24	Correct	2 ms	1020 KB	Output is correct
25	Correct	3 ms	1400 KB	Output is correct
26	Correct	3 ms	1528 KB	Output is correct
27	Correct	6 ms	4088 KB	Output is correct
28	Correct	3 ms	1528 KB	Output is correct
29	Correct	8 ms	5288 KB	Output is correct
30	Correct	7 ms	4344 KB	Output is correct
31	Correct	5 ms	3192 KB	Output is correct
32	Correct	6 ms	4216 KB	Output is correct
33	Correct	8 ms	5368 KB	Output is correct
34	Correct	3 ms	1784 KB	Output is correct
35	Correct	4 ms	2168 KB	Output is correct
36	Correct	8 ms	6852 KB	Output is correct
37	Correct	2 ms	504 KB	Output is correct
38	Correct	150 ms	58148 KB	Output is correct
39	Correct	2 ms	504 KB	Output is correct
40	Incorrect	23 ms	16248 KB	Output isn't correct
41	Correct	2 ms	632 KB	Output is correct
42	Correct	3 ms	1400 KB	Output is correct
43	Correct	206 ms	54776 KB	Output is correct
44	Correct	10 ms	6268 KB	Output is correct
45	Correct	159 ms	56056 KB	Output is correct
46	Correct	156 ms	58656 KB	Output is correct
47	Correct	161 ms	56060 KB	Output is correct
48	Correct	142 ms	58676 KB	Output is correct
49	Correct	144 ms	58652 KB	Output is correct
50	Correct	131 ms	58520 KB	Output is correct
51	Correct	157 ms	58556 KB	Output is correct
52	Correct	154 ms	58716 KB	Output is correct
53	Correct	161 ms	57848 KB	Output is correct
54	Correct	141 ms	45816 KB	Output is correct
55	Correct	129 ms	44064 KB	Output is correct
56	Correct	156 ms	59208 KB	Output is correct
57	Correct	122 ms	39288 KB	Output is correct
58	Correct	126 ms	44280 KB	Output is correct
59	Correct	128 ms	41212 KB	Output is correct
60	Correct	173 ms	51112 KB	Output is correct
61	Correct	158 ms	59704 KB	Output is correct
62	Correct	142 ms	59856 KB	Output is correct
63	Correct	164 ms	59640 KB	Output is correct
64	Correct	129 ms	42616 KB	Output is correct
65	Correct	152 ms	58572 KB	Output is correct
66	Correct	142 ms	55672 KB	Output is correct
67	Correct	163 ms	60228 KB	Output is correct
68	Correct	159 ms	60156 KB	Output is correct
69	Correct	123 ms	39544 KB	Output is correct
70	Correct	50 ms	18296 KB	Output is correct
71	Correct	105 ms	29944 KB	Output is correct
72	Correct	123 ms	33528 KB	Output is correct
73	Correct	110 ms	34244 KB	Output is correct
74	Correct	119 ms	39800 KB	Output is correct
75	Correct	120 ms	41592 KB	Output is correct
76	Correct	123 ms	42872 KB	Output is correct
77	Correct	126 ms	43128 KB	Output is correct
78	Correct	117 ms	43384 KB	Output is correct
79	Correct	89 ms	16468 KB	Output is correct
80	Correct	92 ms	17912 KB	Output is correct
81	Correct	95 ms	18168 KB	Output is correct
82	Correct	127 ms	46840 KB	Output is correct
83	Correct	135 ms	46716 KB	Output is correct
84	Correct	87 ms	11896 KB	Output is correct
85	Correct	124 ms	45688 KB	Output is correct
86	Correct	156 ms	59640 KB	Output is correct
87	Correct	124 ms	45104 KB	Output is correct
88	Correct	136 ms	46072 KB	Output is correct
89	Correct	138 ms	54896 KB	Output is correct
90	Correct	64 ms	33272 KB	Output is correct
91	Correct	129 ms	50204 KB	Output is correct
92	Correct	134 ms	51996 KB	Output is correct
93	Correct	157 ms	59256 KB	Output is correct
94	Correct	137 ms	53516 KB	Output is correct
95	Correct	127 ms	47392 KB	Output is correct
96	Correct	106 ms	46968 KB	Output is correct
97	Correct	139 ms	59688 KB	Output is correct
98	Correct	112 ms	47224 KB	Output is correct
99	Correct	136 ms	53468 KB	Output is correct
100	Correct	154 ms	58960 KB	Output is correct