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Submission #94309

# Submission time Handle Problem Language Result Execution time Memory
94309 2019-01-17T12:53:52 Z Kastanda Bomb (IZhO17_bomb) C++11
35 / 100
 1000 ms 58744 KB 
#include<bits/stdc++.h>
using namespace std;
const int N = 2505;
int n, m, Mnx, R[N], up[N][N], dn[N][N];
int qu[N], F[N];
char A[N][N];
inline int Calc(int lenx)
{
    if (lenx > Mnx)
        return 0;

    int Mn = n;
    for (int i = 1; i <= n; i++)
    {
        int l = 0, r = 0;
        for (int j = 1; j <= m; j++)
        {
            while (r - l && dn[i][j] <= dn[i][qu[r-1]])
                r --;
            qu[r ++] = j;
            if (qu[l] <= j - lenx)
                l ++;
            F[j - lenx + 1] = dn[i][qu[l]] - 1;
        }
        l = r = 0;
        for (int j = 1; j <= m; j++)
        {
            while (r - l && up[i][j] >= up[i][qu[r-1]])
                r --;
            qu[r ++] = j;
            if (qu[l] <= j - lenx)
                l ++;
            F[j - lenx + 1] -= up[i][qu[l]];
        }
        l = r = 0;
        for (int j = 1; j <= m; j++)
        {
            if (j + lenx - 1 <= m)
            {
                F[j] = max(F[j], 0);
                while (r - l && F[j] >= F[qu[r-1]])
                    r --;
                qu[r ++] = j;
            }
            while (qu[l] <= j - lenx)
                l ++;
            if (A[i][j] == '1')
                Mn = min(Mn, F[qu[l]]);
        }
    }
    return (Mn);
}
inline void Init()
{
    Mnx = m;
    for (int i = 1; i <= n; i++)
    {
        int last = 0;
        for (int j = 1; j <= m; j++)
            if (A[i][j] == '0')
            {
                if (last != j - 1)
                    Mnx = min(Mnx, j - last - 1);
                last = j;
            }
        if (last != m)
            Mnx = min(Mnx, m - last);
    }
}
int main()
{
    scanf("%d%d", &n, &m);
    for (int i = 1; i <= n; i++)
        scanf("%s", &A[i][1]);
    Init();

    for (int i = 1; i <= n; i++)
        for (int j = 1; j <= m; j++)
        {
            up[i][j] = i - 1;
            if (A[i - 1][j] == '1')
                up[i][j] = up[i - 1][j];
        }
    for (int i = n; i; i--)
        for (int j = 1; j <= m; j++)
        {
            dn[i][j] = i + 1;
            if (A[i + 1][j] == '1')
                dn[i][j] = dn[i + 1][j];

            if (A[i][j] == '0')
                dn[i][j] = 0, up[i][j] = n + 1;
        }

    memset(R, -1, sizeof(R));
    R[1] = Calc(1) * 1;
    R[Mnx] = Calc(Mnx) * Mnx;

    int le = 1, ri = Mnx + 1, md;
    while (ri - le > 1)
    {
        md = (le + ri) >> 1;
        if (R[md] == -1) R[md] = Calc(md) * md;
        if (R[md-1] == -1) R[md-1] = Calc(md-1) * (md-1);

        if (R[md] > R[md-1])
            le = md;
        else
            ri = md;
    }
    return !printf("%d", R[le]);
}

Compilation message

bomb.cpp: In function 'int main()':
bomb.cpp:72:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~
bomb.cpp:74:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%s", &A[i][1]);
         ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
35.0 / 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 18 ms 26616 KB Output is correct
4 Correct 21 ms 26488 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 436 KB Output is correct
8 Correct 2 ms 632 KB Output is correct
9 Correct 2 ms 632 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 3 ms 1144 KB Output is correct
19 Incorrect 3 ms 1400 KB Output isn't correct
20 Incorrect 3 ms 1400 KB Output isn't correct
21 Correct 2 ms 888 KB Output is correct
22 Correct 3 ms 1272 KB Output is correct
23 Incorrect 4 ms 1528 KB Output isn't correct
24 Incorrect 3 ms 1272 KB Output isn't correct
25 Incorrect 4 ms 1528 KB Output isn't correct
26 Correct 4 ms 1528 KB Output is correct
27 Correct 8 ms 4088 KB Output is correct
28 Correct 12 ms 4216 KB Output is correct
29 Incorrect 25 ms 5372 KB Output isn't correct
30 Incorrect 38 ms 6544 KB Output isn't correct
31 Incorrect 29 ms 5112 KB Output isn't correct
32 Incorrect 28 ms 5884 KB Output isn't correct
33 Incorrect 40 ms 6800 KB Output isn't correct
34 Correct 12 ms 4728 KB Output is correct
35 Incorrect 39 ms 6760 KB Output isn't correct
36 Correct 33 ms 6904 KB Output is correct
37 Correct 2 ms 508 KB Output is correct
38 Execution timed out 1073 ms 57488 KB Time limit exceeded
39 Correct 2 ms 504 KB Output is correct
40 Correct 181 ms 16208 KB Output is correct
41 Correct 2 ms 504 KB Output is correct
42 Incorrect 4 ms 1532 KB Output isn't correct
43 Execution timed out 1060 ms 57392 KB Time limit exceeded
44 Incorrect 47 ms 6776 KB Output isn't correct
45 Execution timed out 1075 ms 57564 KB Time limit exceeded
46 Correct 917 ms 57496 KB Output is correct
47 Execution timed out 1075 ms 57464 KB Time limit exceeded
48 Execution timed out 1071 ms 57592 KB Time limit exceeded
49 Correct 387 ms 57464 KB Output is correct
50 Execution timed out 1074 ms 57464 KB Time limit exceeded
51 Execution timed out 1068 ms 57464 KB Time limit exceeded
52 Execution timed out 1037 ms 57496 KB Time limit exceeded
53 Execution timed out 1047 ms 57592 KB Time limit exceeded
54 Execution timed out 1069 ms 57464 KB Time limit exceeded
55 Correct 995 ms 57492 KB Output is correct
56 Execution timed out 1073 ms 57592 KB Time limit exceeded
57 Execution timed out 1074 ms 57464 KB Time limit exceeded
58 Execution timed out 1061 ms 57464 KB Time limit exceeded
59 Execution timed out 1031 ms 57592 KB Time limit exceeded
60 Correct 731 ms 57592 KB Output is correct
61 Correct 939 ms 57512 KB Output is correct
62 Execution timed out 1083 ms 57464 KB Time limit exceeded
63 Execution timed out 1063 ms 57464 KB Time limit exceeded
64 Execution timed out 1070 ms 57464 KB Time limit exceeded
65 Correct 838 ms 57592 KB Output is correct
66 Execution timed out 1065 ms 57464 KB Time limit exceeded
67 Execution timed out 1079 ms 57464 KB Time limit exceeded
68 Execution timed out 1071 ms 57464 KB Time limit exceeded
69 Execution timed out 1074 ms 57464 KB Time limit exceeded
70 Incorrect 773 ms 46072 KB Output isn't correct
71 Execution timed out 1067 ms 57592 KB Time limit exceeded
72 Execution timed out 1083 ms 57464 KB Time limit exceeded
73 Execution timed out 1076 ms 57464 KB Time limit exceeded
74 Execution timed out 1060 ms 57464 KB Time limit exceeded
75 Execution timed out 1088 ms 57464 KB Time limit exceeded
76 Execution timed out 1070 ms 57464 KB Time limit exceeded
77 Execution timed out 1064 ms 57464 KB Time limit exceeded
78 Execution timed out 1083 ms 57464 KB Time limit exceeded
79 Incorrect 797 ms 57616 KB Output isn't correct
80 Incorrect 679 ms 57592 KB Output isn't correct
81 Execution timed out 1062 ms 57468 KB Time limit exceeded
82 Execution timed out 1077 ms 57980 KB Time limit exceeded
83 Execution timed out 1058 ms 57972 KB Time limit exceeded
84 Execution timed out 1074 ms 57976 KB Time limit exceeded
85 Execution timed out 1084 ms 57976 KB Time limit exceeded
86 Incorrect 992 ms 58120 KB Output isn't correct
87 Execution timed out 1095 ms 58104 KB Time limit exceeded
88 Execution timed out 1083 ms 58104 KB Time limit exceeded
89 Execution timed out 1066 ms 58096 KB Time limit exceeded
90 Incorrect 875 ms 47080 KB Output isn't correct
91 Execution timed out 1075 ms 58600 KB Time limit exceeded
92 Execution timed out 1077 ms 58616 KB Time limit exceeded
93 Incorrect 963 ms 58744 KB Output isn't correct
94 Execution timed out 1072 ms 58488 KB Time limit exceeded
95 Execution timed out 1080 ms 58360 KB Time limit exceeded
96 Execution timed out 1074 ms 58184 KB Time limit exceeded
97 Incorrect 915 ms 58356 KB Output isn't correct
98 Execution timed out 1075 ms 58292 KB Time limit exceeded
99 Execution timed out 1079 ms 58232 KB Time limit exceeded
100 Execution timed out 1030 ms 58488 KB Time limit exceeded