oj.uz

Submission #38945

# Submission time Handle Problem Language Result Execution time Memory
38945 2018-01-08T09:01:12 Z touristk2000 Bomb (IZhO17_bomb) C++14
0 / 100
 123 ms 49988 KB 
#include <stdio.h>
const int maxn = 2501;
int dp[maxn][maxn];
int a[maxn][maxn];
int p[maxn];
int t;///;[maxn];
int n, m, res = 1;
bool check(int i, int j){
            for(int c = 1; c <= m; c ++) p[c] = n + 1;
            bool f = true;
            for(int I = n; I >= 1 && f; I --){
                int q = m + 1;
                for(int J = m; J >= 1 && f; J --){
                    if(I>=i&&J>=j){
                    if(dp[I][J] - dp[I-i][J] - dp[I][J-j] + dp[I-i][J-j] == i * j){
                        q = J - j;
                    }}
                    if(J > q) p[J] = I-i;
                    if(a[I][J] && p[J] >= I) f = false;
                }
            }
            return f;
}
int main(){
    //freopen("bomb.in", "r", stdin);
    //freopen("bomb.out", "w", stdout);
    char c;
    scanf("%d%d", &n, &m);
    for(int i = 1; i <= n; i ++){
        c = getchar();
        for(int j = 1; j <= m; j ++){
            a[i][j] = dp[i][j] = getchar() - '0';
            dp[i][j] += dp[i-1][j] + dp[i][j-1] - dp[i-1][j-1];
        }
    }
    t = m;
    ///for(int i = 1; i <= m; i ++)t[i] = m;
    for(int i = 1; i <= n; i ++){
        int L = 1, R = t, M;
        while(L <= R){
            M = (L + R) >> 1;
            if(check(i, M)){
                if(i * M > res) res = i * M;
                L = M + 1;
            }else
            R = M - 1;
        }
        t = R;
    }
    printf("%d", res);
    return 0;
}

Compilation message

bomb.cpp: In function 'int main()':
bomb.cpp:27:10: warning: variable 'c' set but not used [-Wunused-but-set-variable]
     char c;
          ^
bomb.cpp:28:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &m);
                          ^

Subtask #1
0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 49988 KB Output isn't correct
2 Incorrect 0 ms 49988 KB Output isn't correct
3 Incorrect 0 ms 49988 KB Output isn't correct
4 Incorrect 0 ms 49988 KB Output isn't correct
5 Incorrect 0 ms 49988 KB Output isn't correct
6 Incorrect 0 ms 49988 KB Output isn't correct
7 Incorrect 0 ms 49988 KB Output isn't correct
8 Incorrect 0 ms 49988 KB Output isn't correct
9 Incorrect 0 ms 49988 KB Output isn't correct
10 Incorrect 0 ms 49988 KB Output isn't correct
11 Incorrect 0 ms 49988 KB Output isn't correct
12 Incorrect 0 ms 49988 KB Output isn't correct
13 Incorrect 0 ms 49988 KB Output isn't correct
14 Incorrect 0 ms 49988 KB Output isn't correct
15 Incorrect 0 ms 49988 KB Output isn't correct
16 Incorrect 0 ms 49988 KB Output isn't correct
17 Incorrect 0 ms 49988 KB Output isn't correct
18 Incorrect 0 ms 49988 KB Output isn't correct
19 Incorrect 0 ms 49988 KB Output isn't correct
20 Incorrect 0 ms 49988 KB Output isn't correct
21 Incorrect 0 ms 49988 KB Output isn't correct
22 Incorrect 0 ms 49988 KB Output isn't correct
23 Incorrect 0 ms 49988 KB Output isn't correct
24 Incorrect 0 ms 49988 KB Output isn't correct
25 Incorrect 0 ms 49988 KB Output isn't correct
26 Incorrect 0 ms 49988 KB Output isn't correct
27 Incorrect 0 ms 49988 KB Output isn't correct
28 Incorrect 3 ms 49988 KB Output isn't correct
29 Incorrect 3 ms 49988 KB Output isn't correct
30 Incorrect 0 ms 49988 KB Output isn't correct
31 Incorrect 6 ms 49988 KB Output isn't correct
32 Incorrect 0 ms 49988 KB Output isn't correct
33 Incorrect 3 ms 49988 KB Output isn't correct
34 Incorrect 0 ms 49988 KB Output isn't correct
35 Incorrect 3 ms 49988 KB Output isn't correct
36 Incorrect 0 ms 49988 KB Output isn't correct
37 Incorrect 0 ms 49988 KB Output isn't correct
38 Incorrect 63 ms 49988 KB Output isn't correct
39 Incorrect 0 ms 49988 KB Output isn't correct
40 Incorrect 6 ms 49988 KB Output isn't correct
41 Incorrect 0 ms 49988 KB Output isn't correct
42 Incorrect 0 ms 49988 KB Output isn't correct
43 Incorrect 66 ms 49988 KB Output isn't correct
44 Incorrect 3 ms 49988 KB Output isn't correct
45 Incorrect 83 ms 49988 KB Output isn't correct
46 Incorrect 66 ms 49988 KB Output isn't correct
47 Incorrect 86 ms 49988 KB Output isn't correct
48 Incorrect 99 ms 49988 KB Output isn't correct
49 Incorrect 106 ms 49988 KB Output isn't correct
50 Incorrect 89 ms 49988 KB Output isn't correct
51 Incorrect 76 ms 49988 KB Output isn't correct
52 Incorrect 83 ms 49988 KB Output isn't correct
53 Incorrect 73 ms 49988 KB Output isn't correct
54 Incorrect 76 ms 49988 KB Output isn't correct
55 Incorrect 63 ms 49988 KB Output isn't correct
56 Incorrect 83 ms 49988 KB Output isn't correct
57 Incorrect 59 ms 49988 KB Output isn't correct
58 Incorrect 63 ms 49988 KB Output isn't correct
59 Incorrect 93 ms 49988 KB Output isn't correct
60 Incorrect 76 ms 49988 KB Output isn't correct
61 Incorrect 69 ms 49988 KB Output isn't correct
62 Incorrect 73 ms 49988 KB Output isn't correct
63 Incorrect 79 ms 49988 KB Output isn't correct
64 Incorrect 83 ms 49988 KB Output isn't correct
65 Incorrect 63 ms 49988 KB Output isn't correct
66 Incorrect 106 ms 49988 KB Output isn't correct
67 Incorrect 76 ms 49988 KB Output isn't correct
68 Incorrect 66 ms 49988 KB Output isn't correct
69 Incorrect 89 ms 49988 KB Output isn't correct
70 Incorrect 39 ms 49988 KB Output isn't correct
71 Incorrect 53 ms 49988 KB Output isn't correct
72 Incorrect 56 ms 49988 KB Output isn't correct
73 Incorrect 63 ms 49988 KB Output isn't correct
74 Incorrect 59 ms 49988 KB Output isn't correct
75 Incorrect 86 ms 49988 KB Output isn't correct
76 Incorrect 76 ms 49988 KB Output isn't correct
77 Incorrect 79 ms 49988 KB Output isn't correct
78 Incorrect 63 ms 49988 KB Output isn't correct
79 Incorrect 83 ms 49988 KB Output isn't correct
80 Incorrect 86 ms 49988 KB Output isn't correct
81 Incorrect 56 ms 49988 KB Output isn't correct
82 Incorrect 109 ms 49988 KB Output isn't correct
83 Incorrect 79 ms 49988 KB Output isn't correct
84 Incorrect 123 ms 49988 KB Output isn't correct
85 Incorrect 76 ms 49988 KB Output isn't correct
86 Incorrect 56 ms 49988 KB Output isn't correct
87 Incorrect 59 ms 49988 KB Output isn't correct
88 Incorrect 76 ms 49988 KB Output isn't correct
89 Incorrect 93 ms 49988 KB Output isn't correct
90 Incorrect 66 ms 49988 KB Output isn't correct
91 Incorrect 96 ms 49988 KB Output isn't correct
92 Incorrect 86 ms 49988 KB Output isn't correct
93 Incorrect 89 ms 49988 KB Output isn't correct
94 Incorrect 99 ms 49988 KB Output isn't correct
95 Incorrect 69 ms 49988 KB Output isn't correct
96 Incorrect 63 ms 49988 KB Output isn't correct
97 Incorrect 69 ms 49988 KB Output isn't correct
98 Incorrect 56 ms 49988 KB Output isn't correct
99 Incorrect 79 ms 49988 KB Output isn't correct
100 Incorrect 103 ms 49988 KB Output isn't correct