oj.uz

Submission #100546

# Submission time Handle Problem Language Result Execution time Memory
100546 2019-03-12T07:34:48 Z alexpetrescu Bomb (IZhO17_bomb) C++14
24 / 100
 566 ms 56824 KB 
#include <cstdio>
#include <algorithm>

//FILE *fin = fopen("a.in", "r"), *fout = fopen("a.out", "w");
#define fin stdin
#define fout stdout

#define MAXN 2500

int left[MAXN + 2][MAXN + 2], right[MAXN + 2][MAXN + 2];
int d[MAXN + 2];
char m[MAXN + 2][MAXN + 10];
int nrlin, nrcol;

inline void solve() {
    for (int i = 1; i <= nrlin; i++) {
        left[i][0] = 0;
        for (int j = 1; j <= nrcol; j++)
            if (m[i][j] == '1')
                left[i][j] = left[i][j - 1];
            else
                left[i][j] = j;
        right[i][nrcol + 1] = nrcol + 1;
        for (int j = nrcol; j > 0; j--)
            if (m[i][j] == '1')
                right[i][j] = right[i][j + 1];
            else
                right[i][j] = j;

        for (int j = 1; j <= nrcol; j++)
            if (m[i][j] == '1')
                d[1] = std::min(d[1], right[i][j] - left[i][j] - 1);
    }

    for (int j = 1; j <= nrcol; j++) {
        int val = nrcol, cat = 0;
        for (int i = 1; i <= nrlin; i++) {
            if (m[i][j] == '1') {
                val = std::min(val, right[i][j] - left[i][j] - 1);
                cat++;
                d[cat] = std::min(d[cat], val);
            } else {
                if (cat)
                    d[cat + 1] = 0;
                val = nrcol;
                cat = 0;
            }
        }
        if (cat)
            d[cat + 1] = 0;
    }
}

int main() {
    fscanf(fin, "%d%d ", &nrlin, &nrcol);

    for (int i = 1; i <= nrlin; i++)
        fgets(m[i] + 1, MAXN + 5, fin), d[i] = nrcol;

    solve();

    for (int i = 1; i <= nrlin / 2; i++)
        for (int j = 1; j <= nrcol; j++)
            std::swap(m[i][j], m[nrlin - i + 1][j]);

    solve();

    for (int i = 2; i <= nrlin; i++)
        d[i] = std::min(d[i], d[i - 1]);

    int ans = d[1];
    for (int i = 2; i <= nrlin; i++)
        ans = std::max(ans, i * d[i]);

    fprintf(fout, "%d\n", ans);

    fclose(fin);
    fclose(fout);
    return 0;
}

Compilation message

bomb.cpp: In function 'int main()':
bomb.cpp:55:11: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     fscanf(fin, "%d%d ", &nrlin, &nrcol);
     ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bomb.cpp:58:39: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
         fgets(m[i] + 1, MAXN + 5, fin), d[i] = nrcol;
         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~

Subtask #1
24.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 512 KB Output is correct
3 Correct 21 ms 26496 KB Output is correct
4 Correct 27 ms 26624 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Incorrect 2 ms 512 KB Output isn't correct
9 Incorrect 2 ms 512 KB Output isn't correct
10 Incorrect 2 ms 512 KB Output isn't correct
11 Incorrect 2 ms 512 KB Output isn't correct
12 Incorrect 2 ms 512 KB Output isn't correct
13 Correct 3 ms 512 KB Output is correct
14 Correct 3 ms 512 KB Output is correct
15 Incorrect 2 ms 512 KB Output isn't correct
16 Correct 2 ms 512 KB Output is correct
17 Correct 3 ms 1024 KB Output is correct
18 Incorrect 3 ms 1152 KB Output isn't correct
19 Incorrect 3 ms 1408 KB Output isn't correct
20 Incorrect 3 ms 1280 KB Output isn't correct
21 Incorrect 3 ms 896 KB Output isn't correct
22 Incorrect 3 ms 1152 KB Output isn't correct
23 Incorrect 3 ms 1408 KB Output isn't correct
24 Incorrect 3 ms 1152 KB Output isn't correct
25 Incorrect 3 ms 1408 KB Output isn't correct
26 Correct 3 ms 1408 KB Output is correct
27 Correct 8 ms 4096 KB Output is correct
28 Incorrect 7 ms 4352 KB Output isn't correct
29 Incorrect 9 ms 5504 KB Output isn't correct
30 Incorrect 12 ms 6528 KB Output isn't correct
31 Incorrect 9 ms 5120 KB Output isn't correct
32 Incorrect 4 ms 6016 KB Output isn't correct
33 Incorrect 10 ms 6784 KB Output isn't correct
34 Incorrect 7 ms 4736 KB Output isn't correct
35 Incorrect 10 ms 6784 KB Output isn't correct
36 Correct 15 ms 6916 KB Output is correct
37 Incorrect 2 ms 512 KB Output isn't correct
38 Correct 566 ms 56824 KB Output is correct
39 Incorrect 2 ms 512 KB Output isn't correct
40 Incorrect 53 ms 16256 KB Output isn't correct
41 Incorrect 2 ms 512 KB Output isn't correct
42 Incorrect 4 ms 1408 KB Output isn't correct
43 Correct 421 ms 56748 KB Output is correct
44 Incorrect 10 ms 6784 KB Output isn't correct
45 Incorrect 407 ms 56696 KB Output isn't correct
46 Correct 352 ms 56744 KB Output is correct
47 Incorrect 389 ms 56696 KB Output isn't correct
48 Incorrect 372 ms 56824 KB Output isn't correct
49 Correct 558 ms 56688 KB Output is correct
50 Incorrect 407 ms 56824 KB Output isn't correct
51 Incorrect 382 ms 56824 KB Output isn't correct
52 Incorrect 368 ms 56776 KB Output isn't correct
53 Incorrect 363 ms 56716 KB Output isn't correct
54 Incorrect 241 ms 56696 KB Output isn't correct
55 Incorrect 246 ms 56824 KB Output isn't correct
56 Correct 523 ms 56696 KB Output is correct
57 Incorrect 229 ms 56760 KB Output isn't correct
58 Incorrect 231 ms 56568 KB Output isn't correct
59 Incorrect 283 ms 56568 KB Output isn't correct
60 Correct 370 ms 56568 KB Output is correct
61 Correct 559 ms 56568 KB Output is correct
62 Correct 542 ms 56668 KB Output is correct
63 Correct 548 ms 56524 KB Output is correct
64 Correct 252 ms 56440 KB Output is correct
65 Incorrect 376 ms 56676 KB Output isn't correct
66 Incorrect 352 ms 56568 KB Output isn't correct
67 Incorrect 405 ms 56752 KB Output isn't correct
68 Incorrect 396 ms 56696 KB Output isn't correct
69 Incorrect 261 ms 56696 KB Output isn't correct
70 Incorrect 139 ms 45560 KB Output isn't correct
71 Incorrect 216 ms 56568 KB Output isn't correct
72 Incorrect 226 ms 56700 KB Output isn't correct
73 Incorrect 273 ms 56640 KB Output isn't correct
74 Incorrect 244 ms 56708 KB Output isn't correct
75 Incorrect 252 ms 56552 KB Output isn't correct
76 Incorrect 272 ms 56436 KB Output isn't correct
77 Incorrect 269 ms 56568 KB Output isn't correct
78 Incorrect 319 ms 56664 KB Output isn't correct
79 Incorrect 145 ms 56472 KB Output isn't correct
80 Incorrect 140 ms 56296 KB Output isn't correct
81 Incorrect 152 ms 56312 KB Output isn't correct
82 Incorrect 277 ms 56340 KB Output isn't correct
83 Incorrect 267 ms 56184 KB Output isn't correct
84 Incorrect 129 ms 56156 KB Output isn't correct
85 Incorrect 281 ms 56184 KB Output isn't correct
86 Incorrect 507 ms 56216 KB Output isn't correct
87 Incorrect 243 ms 56184 KB Output isn't correct
88 Incorrect 273 ms 56144 KB Output isn't correct
89 Incorrect 333 ms 56184 KB Output isn't correct
90 Incorrect 131 ms 45068 KB Output isn't correct
91 Incorrect 331 ms 55928 KB Output isn't correct
92 Incorrect 346 ms 56056 KB Output isn't correct
93 Incorrect 539 ms 56032 KB Output isn't correct
94 Incorrect 324 ms 56028 KB Output isn't correct
95 Incorrect 252 ms 56056 KB Output isn't correct
96 Incorrect 242 ms 56056 KB Output isn't correct
97 Incorrect 522 ms 55884 KB Output isn't correct
98 Incorrect 292 ms 55800 KB Output isn't correct
99 Incorrect 323 ms 55896 KB Output isn't correct
100 Incorrect 454 ms 55804 KB Output isn't correct