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Submission #94312

# Submission time Handle Problem Language Result Execution time Memory
94312 2019-01-17T12:59:40 Z Kastanda Bomb (IZhO17_bomb) C++11
41 / 100
 451 ms 26616 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);
    }
}
void Solve(int l = 1, int r = Mnx)
{
    if (r - l + 1 <= 2)
        return ;
    if (R[l] == R[r])
    {
        for (int i = l + 1; i < r; i++)
            R[i] = R[l];
        return ;
    }
    int md = (l + r) >> 1;
    R[md] = Calc(md);
    Solve(l, md);
    Solve(md, r);
}
int main()
{
    scanf("%d%d", &n, &m);
    for (int i = 1; i <= n; i++)
        scanf("%s", &A[i][1]);
    Init();

    if (1LL * n * m * m >= 1000 * 1000 * 1000)
        return !printf("No thanks.");

    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;
        }
    R[1] = Calc(1);
    R[Mnx] = Calc(Mnx);
    Solve(1, Mnx);

    set < int > S;
    for (int i = 1; i <= Mnx; i++)
        S.insert(R[i]);

    if ((int)S.size() >= 50)
        assert(0);

    int Mx_s = 0;
    for (int i = 1; i <= Mnx; i++)
        Mx_s = max(Mx_s, i * R[i]);
    return !printf("%d", Mx_s);
}

Compilation message

bomb.cpp: In function 'int main()':
bomb.cpp:87:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~
bomb.cpp:89:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%s", &A[i][1]);
         ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
41.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 508 KB Output is correct
3 Correct 21 ms 26616 KB Output is correct
4 Correct 21 ms 26548 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 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 2 ms 1016 KB Output is correct
18 Correct 3 ms 1144 KB Output is correct
19 Correct 3 ms 1400 KB Output is correct
20 Correct 3 ms 1400 KB Output is correct
21 Correct 3 ms 1016 KB Output is correct
22 Correct 3 ms 1272 KB Output is correct
23 Correct 3 ms 1400 KB Output is correct
24 Correct 3 ms 1272 KB Output is correct
25 Correct 3 ms 1400 KB Output is correct
26 Correct 3 ms 1528 KB Output is correct
27 Correct 7 ms 4088 KB Output is correct
28 Correct 14 ms 4216 KB Output is correct
29 Correct 86 ms 5368 KB Output is correct
30 Correct 31 ms 6456 KB Output is correct
31 Correct 25 ms 5112 KB Output is correct
32 Correct 23 ms 5880 KB Output is correct
33 Correct 41 ms 6776 KB Output is correct
34 Correct 15 ms 4728 KB Output is correct
35 Correct 38 ms 6776 KB Output is correct
36 Correct 12 ms 6776 KB Output is correct
37 Correct 2 ms 632 KB Output is correct
38 Incorrect 27 ms 9464 KB Output isn't correct
39 Correct 2 ms 504 KB Output is correct
40 Correct 339 ms 16196 KB Output is correct
41 Correct 2 ms 504 KB Output is correct
42 Correct 7 ms 1400 KB Output is correct
43 Incorrect 28 ms 9464 KB Output isn't correct
44 Runtime error 451 ms 13276 KB Execution killed with signal 11 (could be triggered by violating memory limits)
45 Incorrect 30 ms 9464 KB Output isn't correct
46 Incorrect 32 ms 9592 KB Output isn't correct
47 Incorrect 29 ms 9468 KB Output isn't correct
48 Incorrect 30 ms 9464 KB Output isn't correct
49 Incorrect 27 ms 9464 KB Output isn't correct
50 Incorrect 28 ms 9436 KB Output isn't correct
51 Incorrect 29 ms 9464 KB Output isn't correct
52 Incorrect 28 ms 9464 KB Output isn't correct
53 Incorrect 30 ms 9536 KB Output isn't correct
54 Incorrect 45 ms 9508 KB Output isn't correct
55 Incorrect 29 ms 9464 KB Output isn't correct
56 Incorrect 19 ms 9592 KB Output isn't correct
57 Incorrect 30 ms 9468 KB Output isn't correct
58 Incorrect 29 ms 10104 KB Output isn't correct
59 Incorrect 29 ms 10104 KB Output isn't correct
60 Incorrect 30 ms 10104 KB Output isn't correct
61 Incorrect 27 ms 10104 KB Output isn't correct
62 Incorrect 26 ms 10104 KB Output isn't correct
63 Incorrect 27 ms 9848 KB Output isn't correct
64 Incorrect 30 ms 9832 KB Output isn't correct
65 Incorrect 29 ms 9820 KB Output isn't correct
66 Incorrect 29 ms 9888 KB Output isn't correct
67 Incorrect 30 ms 9848 KB Output isn't correct
68 Incorrect 30 ms 9884 KB Output isn't correct
69 Incorrect 30 ms 9848 KB Output isn't correct
70 Incorrect 21 ms 8056 KB Output isn't correct
71 Incorrect 32 ms 9848 KB Output isn't correct
72 Incorrect 30 ms 9976 KB Output isn't correct
73 Incorrect 31 ms 9848 KB Output isn't correct
74 Incorrect 31 ms 9592 KB Output isn't correct
75 Incorrect 30 ms 9592 KB Output isn't correct
76 Incorrect 31 ms 9592 KB Output isn't correct
77 Incorrect 31 ms 9848 KB Output isn't correct
78 Incorrect 30 ms 9848 KB Output isn't correct
79 Incorrect 32 ms 9720 KB Output isn't correct
80 Incorrect 31 ms 9464 KB Output isn't correct
81 Incorrect 32 ms 9356 KB Output isn't correct
82 Incorrect 31 ms 8776 KB Output isn't correct
83 Incorrect 30 ms 8952 KB Output isn't correct
84 Incorrect 31 ms 8824 KB Output isn't correct
85 Incorrect 31 ms 8700 KB Output isn't correct
86 Incorrect 28 ms 8696 KB Output isn't correct
87 Incorrect 31 ms 8696 KB Output isn't correct
88 Incorrect 30 ms 8696 KB Output isn't correct
89 Incorrect 29 ms 8440 KB Output isn't correct
90 Incorrect 21 ms 6520 KB Output isn't correct
91 Incorrect 29 ms 7928 KB Output isn't correct
92 Incorrect 28 ms 7928 KB Output isn't correct
93 Incorrect 28 ms 7928 KB Output isn't correct
94 Incorrect 28 ms 8056 KB Output isn't correct
95 Incorrect 29 ms 7928 KB Output isn't correct
96 Incorrect 29 ms 7964 KB Output isn't correct
97 Incorrect 28 ms 7932 KB Output isn't correct
98 Incorrect 51 ms 8056 KB Output isn't correct
99 Incorrect 29 ms 7928 KB Output isn't correct
100 Incorrect 28 ms 8056 KB Output isn't correct