Submission #93210

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
93210	2019-01-07T09:31:37 Z	Abelyan	Bomb (IZhO17_bomb)	C++17	90 / 100	195 ms	58872 KB

bomb

#include <iostream>
#include <algorithm>
#include <climits>
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){
	//cout << a << " " << b << endl;
	if (a > ans2 || b > ans1)return;
	pr[a] = min(pr[a], b);
}

int main(){
	ios_base::sync_with_stdio(false);
	int n, m;
	cin >> n >> m;
	for (int i = 0; i<n; i++){
		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 != 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;
	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')){
				int ans = INT_MAX,k=0;
				while (i<n && c[i][j] == '1'){
					k++;
					ans = min(ans, praj[i][j]);
					ad(k, ans);
					i++;
				}
				i--;
			}
			else if (c[i][j]=='1' &&(j==m-1 || c[i][j+1]=='0')){
				int ans = INT_MAX, k = 0;
				while (i<n && c[i][j] == '1'){
					k++;
					ans = min(ans, prdz[i][j]);
					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')){
				int ans = INT_MAX, k = 0;
				while (i<n && c[i][j] == '1'){
					k++;
					ans = min(ans, praj[i][j]);
					ad(k, ans);
					i--;
				}
				i++;
			}
			else if (c[i][j] == '1' && (j == m - 1 || c[i][j + 1] == '0')){
				int ans = INT_MAX, k = 0;
				while (i<n && c[i][j] == '1'){
					k++;
					ans = min(ans, prdz[i][j]);
					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 << verj << endl;
	return 0;
}
/*
5 6
001000
111110
111110
111110
000100
*/

Subtask #1

90.0 / 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	25 ms	26716 KB	Output is correct
4	Correct	24 ms	26532 KB	Output is correct
5	Correct	2 ms	376 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	504 KB	Output is correct
10	Correct	2 ms	576 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	508 KB	Output is correct
14	Correct	2 ms	552 KB	Output is correct
15	Correct	2 ms	504 KB	Output is correct
16	Correct	2 ms	632 KB	Output is correct
17	Incorrect	2 ms	1016 KB	Output isn't correct
18	Correct	2 ms	808 KB	Output is correct
19	Correct	2 ms	1016 KB	Output is correct
20	Correct	2 ms	1016 KB	Output is correct
21	Correct	2 ms	632 KB	Output is correct
22	Correct	2 ms	760 KB	Output is correct
23	Correct	3 ms	1016 KB	Output is correct
24	Correct	2 ms	1016 KB	Output is correct
25	Correct	3 ms	1400 KB	Output is correct
26	Incorrect	3 ms	1528 KB	Output isn't correct
27	Correct	6 ms	4216 KB	Output is correct
28	Correct	3 ms	1528 KB	Output is correct
29	Incorrect	8 ms	5368 KB	Output isn't correct
30	Correct	7 ms	4348 KB	Output is correct
31	Correct	6 ms	3164 KB	Output is correct
32	Correct	6 ms	4216 KB	Output is correct
33	Correct	8 ms	5496 KB	Output is correct
34	Correct	4 ms	1784 KB	Output is correct
35	Correct	4 ms	2168 KB	Output is correct
36	Incorrect	9 ms	6904 KB	Output isn't correct
37	Correct	2 ms	632 KB	Output is correct
38	Correct	159 ms	58872 KB	Output is correct
39	Correct	2 ms	632 KB	Output is correct
40	Incorrect	25 ms	16248 KB	Output isn't correct
41	Correct	2 ms	632 KB	Output is correct
42	Correct	3 ms	1404 KB	Output is correct
43	Correct	195 ms	54520 KB	Output is correct
44	Correct	9 ms	6264 KB	Output is correct
45	Correct	169 ms	55900 KB	Output is correct
46	Correct	155 ms	58444 KB	Output is correct
47	Correct	161 ms	55940 KB	Output is correct
48	Incorrect	154 ms	58204 KB	Output isn't correct
49	Correct	173 ms	58188 KB	Output is correct
50	Incorrect	133 ms	58336 KB	Output isn't correct
51	Incorrect	139 ms	58360 KB	Output isn't correct
52	Correct	134 ms	58104 KB	Output is correct
53	Correct	152 ms	57520 KB	Output is correct
54	Correct	139 ms	44764 KB	Output is correct
55	Correct	115 ms	43224 KB	Output is correct
56	Correct	150 ms	58232 KB	Output is correct
57	Correct	127 ms	38392 KB	Output is correct
58	Correct	130 ms	43384 KB	Output is correct
59	Correct	126 ms	40184 KB	Output is correct
60	Correct	171 ms	50032 KB	Output is correct
61	Correct	186 ms	57948 KB	Output is correct
62	Correct	164 ms	57848 KB	Output is correct
63	Correct	157 ms	57696 KB	Output is correct
64	Correct	124 ms	40568 KB	Output is correct
65	Correct	156 ms	56520 KB	Output is correct
66	Correct	139 ms	53928 KB	Output is correct
67	Incorrect	138 ms	57592 KB	Output isn't correct
68	Incorrect	157 ms	57720 KB	Output isn't correct
69	Correct	125 ms	37288 KB	Output is correct
70	Correct	67 ms	17508 KB	Output is correct
71	Correct	112 ms	29944 KB	Output is correct
72	Correct	114 ms	33616 KB	Output is correct
73	Correct	115 ms	34140 KB	Output is correct
74	Correct	119 ms	37772 KB	Output is correct
75	Correct	119 ms	39416 KB	Output is correct
76	Correct	104 ms	40864 KB	Output is correct
77	Correct	103 ms	41416 KB	Output is correct
78	Correct	102 ms	41592 KB	Output is correct
79	Correct	69 ms	13944 KB	Output is correct
80	Correct	84 ms	15364 KB	Output is correct
81	Correct	80 ms	15736 KB	Output is correct
82	Correct	105 ms	43640 KB	Output is correct
83	Correct	108 ms	43880 KB	Output is correct
84	Correct	87 ms	8940 KB	Output is correct
85	Correct	127 ms	42744 KB	Output is correct
86	Correct	158 ms	56116 KB	Output is correct
87	Correct	113 ms	41464 KB	Output is correct
88	Correct	104 ms	42448 KB	Output is correct
89	Correct	122 ms	50936 KB	Output is correct
90	Correct	73 ms	31224 KB	Output is correct
91	Correct	130 ms	46416 KB	Output is correct
92	Correct	128 ms	48076 KB	Output is correct
93	Correct	135 ms	55076 KB	Output is correct
94	Correct	119 ms	49760 KB	Output is correct
95	Correct	104 ms	43696 KB	Output is correct
96	Correct	105 ms	43228 KB	Output is correct
97	Correct	152 ms	55664 KB	Output is correct
98	Correct	126 ms	42776 KB	Output is correct
99	Correct	137 ms	49016 KB	Output is correct
100	Correct	143 ms	54300 KB	Output is correct