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Submission #341001

# Submission time Handle Problem Language Result Execution time Memory
341001 2020-12-28T21:07:00 Z Tosic Bomb (IZhO17_bomb) C++14
87 / 100
 181 ms 80244 KB 
#include <bits/stdc++.h>
#define maxn 2510
using namespace std;

int n, m, ans, dp[maxn];
int a[maxn][maxn], up[maxn][maxn], down[maxn][maxn];

int main(){
	ios_base::sync_with_stdio(0);
	cout.tie(0);
	cin.tie(0);
	cin >> n >> m;
	for(int i = 0; i < n; ++i){
		dp[i+1] = 1e9;
		for(int j = 0; j < m; ++j){
			char tmpC;
			cin >>tmpC;
			a[i][j] = tmpC-'0';
		}
	}
	for(int i = 0; i < n; ++i){
		for(int j = 0; j < m; ++j){
			if(a[i][j]){
				up[i][j] = 1;
				if(i){
					up[i][j] += up[i-1][j];
				}
			}
		}
	}
	int tmp=n;
	for(int i = n-1; i >= 0; --i){
		for(int j = 0; j < m; ++j){
			if(a[i][j]){
				down[i][j] = 1 + down[i+1][j];
			}
		}
	}
	for(int i = 0; i < n; ++i){
		for(int j = 0; j < m; ++j){
			if(!a[i][j]){
				continue;
			}
			int frJ = j, ln = 1, maxUp = up[i][j], maxD = down[i][j];
			dp[1] = min(dp[1], maxUp+maxD-1);
			while(a[i][j+1]){
				++j;
				++ln;
				maxUp = min(maxUp, up[i][j]);
				maxD = min(maxD, down[i][j]);
				dp[ln] = min(dp[ln], maxUp+maxD-1);

			}
			maxUp = 1e9, maxD = 1e9;
			ln = 1;
			for(int k = j; k >= frJ; --k){
				maxD = min(maxD, down[i][k]);
				maxUp = min(maxUp, up[i][k]);
				dp[ln] = min(dp[ln], maxUp+maxD-1);
				++ln;
			}
			tmp = min(tmp, abs(frJ-j)+1);
		}
	}
	for(int i = 1; i <= tmp; ++i){
		ans = max(ans, i*dp[i]);
	}
	cout << ans;
}

Subtask #1
87.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Output isn't correct
2 Correct 1 ms 492 KB Output is correct
3 Correct 14 ms 30464 KB Output is correct
4 Correct 14 ms 30444 KB Output is correct
5 Incorrect 1 ms 364 KB Output isn't correct
6 Incorrect 1 ms 492 KB Output isn't correct
7 Incorrect 1 ms 364 KB Output isn't correct
8 Correct 1 ms 492 KB Output is correct
9 Correct 1 ms 492 KB Output is correct
10 Correct 1 ms 492 KB Output is correct
11 Correct 1 ms 620 KB Output is correct
12 Correct 1 ms 492 KB Output is correct
13 Correct 1 ms 492 KB Output is correct
14 Correct 1 ms 492 KB Output is correct
15 Correct 1 ms 492 KB Output is correct
16 Correct 1 ms 620 KB Output is correct
17 Correct 1 ms 1132 KB Output is correct
18 Correct 1 ms 1004 KB Output is correct
19 Correct 1 ms 1260 KB Output is correct
20 Correct 1 ms 1260 KB Output is correct
21 Correct 1 ms 748 KB Output is correct
22 Correct 1 ms 1004 KB Output is correct
23 Correct 2 ms 1260 KB Output is correct
24 Correct 1 ms 1132 KB Output is correct
25 Correct 1 ms 1516 KB Output is correct
26 Incorrect 1 ms 1644 KB Output isn't correct
27 Incorrect 5 ms 4972 KB Output isn't correct
28 Correct 4 ms 2540 KB Output is correct
29 Correct 6 ms 6380 KB Output is correct
30 Correct 7 ms 5740 KB Output is correct
31 Correct 5 ms 4332 KB Output is correct
32 Correct 6 ms 5484 KB Output is correct
33 Correct 8 ms 7020 KB Output is correct
34 Correct 4 ms 2668 KB Output is correct
35 Correct 6 ms 3692 KB Output is correct
36 Incorrect 9 ms 8300 KB Output isn't correct
37 Correct 1 ms 620 KB Output is correct
38 Correct 179 ms 80108 KB Output is correct
39 Correct 1 ms 620 KB Output is correct
40 Correct 27 ms 20716 KB Output is correct
41 Correct 1 ms 620 KB Output is correct
42 Correct 1 ms 1644 KB Output is correct
43 Correct 167 ms 76396 KB Output is correct
44 Correct 8 ms 7788 KB Output is correct
45 Correct 166 ms 77548 KB Output is correct
46 Correct 169 ms 80108 KB Output is correct
47 Correct 169 ms 77676 KB Output is correct
48 Correct 171 ms 80108 KB Output is correct
49 Incorrect 174 ms 80236 KB Output isn't correct
50 Correct 167 ms 80236 KB Output is correct
51 Correct 167 ms 80236 KB Output is correct
52 Correct 169 ms 80108 KB Output is correct
53 Correct 167 ms 79468 KB Output is correct
54 Correct 154 ms 66796 KB Output is correct
55 Correct 154 ms 65004 KB Output is correct
56 Correct 178 ms 80236 KB Output is correct
57 Correct 151 ms 60140 KB Output is correct
58 Correct 155 ms 65188 KB Output is correct
59 Correct 152 ms 62060 KB Output is correct
60 Incorrect 161 ms 71916 KB Output isn't correct
61 Incorrect 178 ms 80244 KB Output isn't correct
62 Incorrect 173 ms 80108 KB Output isn't correct
63 Incorrect 173 ms 80128 KB Output isn't correct
64 Incorrect 154 ms 62956 KB Output isn't correct
65 Correct 166 ms 79084 KB Output is correct
66 Correct 164 ms 76012 KB Output is correct
67 Correct 168 ms 80108 KB Output is correct
68 Correct 169 ms 80108 KB Output is correct
69 Correct 149 ms 59628 KB Output is correct
70 Correct 92 ms 33900 KB Output is correct
71 Correct 147 ms 52716 KB Output is correct
72 Correct 152 ms 58220 KB Output is correct
73 Correct 149 ms 58604 KB Output is correct
74 Correct 153 ms 60140 KB Output is correct
75 Correct 154 ms 61804 KB Output is correct
76 Correct 151 ms 63100 KB Output is correct
77 Correct 154 ms 63596 KB Output is correct
78 Correct 155 ms 63852 KB Output is correct
79 Correct 133 ms 36332 KB Output is correct
80 Correct 135 ms 37612 KB Output is correct
81 Correct 137 ms 37984 KB Output is correct
82 Correct 163 ms 66284 KB Output is correct
83 Correct 158 ms 66540 KB Output is correct
84 Correct 134 ms 31640 KB Output is correct
85 Correct 158 ms 65516 KB Output is correct
86 Correct 177 ms 78956 KB Output is correct
87 Correct 158 ms 64364 KB Output is correct
88 Correct 159 ms 65260 KB Output is correct
89 Correct 168 ms 74080 KB Output is correct
90 Correct 104 ms 48108 KB Output is correct
91 Correct 160 ms 69356 KB Output is correct
92 Correct 171 ms 71020 KB Output is correct
93 Correct 181 ms 78132 KB Output is correct
94 Correct 167 ms 72684 KB Output is correct
95 Correct 162 ms 66540 KB Output is correct
96 Correct 158 ms 66284 KB Output is correct
97 Correct 176 ms 78924 KB Output is correct
98 Correct 155 ms 66028 KB Output is correct
99 Correct 161 ms 72428 KB Output is correct
100 Correct 173 ms 77648 KB Output is correct