oj.uz

Submission #140509

# Submission time Handle Problem Language Result Execution time Memory
140509 2019-08-03T09:21:21 Z wasyl Snake Escaping (JOI18_snake_escaping) C++11
75 / 100
 2000 ms 44644 KB 
#include <bits/stdc++.h>
using namespace std;

constexpr int lax = 20, qax = 1e6, nax = (1 << lax);

int l, q, n, tab[nax], pre[3][nax];
string s;
vector< int > ind;

int id(const char c)
{
    if (c == '?') return 2;
    return c - '0';
}

int rek(const int t, string& s, const int v, const int msk = 0)
{
    for (int j = v; j < ind.size(); ++j)
    {
        int i = ind[j];
        if (id(s[i]) == t)
        {
            int res = 0;
            if (t == 2)
            {
                s[i] = '0';
                res += rek(t, s, j + 1, msk);
                s[i] = '1';
                res += rek(t, s, j + 1, msk + (1 << i));
                s[i] = '?';
                return res;
            }
            if (t == 0)
            {
                s[i] = '?';
                res += rek(t, s, j + 1, msk + (1 << i));
                s[i] = '1';
                res -= rek(t, s, j + 1, msk);
                s[i] = '0';
                return res;
            }
            if (t == 1)
            {
                s[i] = '?';
                res += rek(t, s, j + 1, msk + (1 << i));
                s[i] = '0';
                res -= rek(t, s, j + 1, msk);
                s[i] = '1';
                return res;
            }

        }
    }
    return pre[t][msk]; //spo
}

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    cin >> l >> q;
    n = (1 << l);

    cin >> s;

    for (int i = 0; i < n; ++i)
        tab[i] = s[i] - '0';

    for (int i = 0; i < n; ++i)
        pre[0][i] = tab[(n - 1) - i];
    for (int i = 0; i < n; ++i)
        pre[1][i] = tab[i];
    for (int i = 0; i < n; ++i)
        pre[2][i] = tab[i];

    for (int i = 0; i < l; ++i)
        for (int j = 0; j < n; ++j)
            if ((1 << i) & j)
                pre[0][j] += pre[0][j - (1 << i)],
                pre[1][j] += pre[1][j - (1 << i)];

                for (int i = 0; i < q; ++i)
                {
                    string s; cin >> s;
                    reverse(begin(s), end(s));
                    int zl[2] = {0, 0};
                    for (char c : s)
                        if (c == '0' or c == '1')
                            ++zl[c - '0'];
                    if (zl[0] <= lax / 3)
                    {
                        ind.clear();
                        for (int i = 0; i < l; ++i)
                            if (s[i] == '0')
                                ind.push_back(i);
                        int msk = 0;
                        for (int i = 0; i < l; ++i)
                            if (s[i] == '?')
                                msk += (1 << i);
                        cout << rek(0, s, 0, msk) << '\n';
                    }
                    else if (zl[1] <= lax / 3)
                    {
                        ind.clear();
                        for (int i = 0; i < l; ++i)
                            if (s[i] == '1')
                                ind.push_back(i);
                        int msk = 0;
                        for (int i = 0; i < l; ++i)
                            if (s[i] == '?')
                                msk += (1 << i);
                        cout << rek(1, s, 0, msk) << '\n';
                    }
                    else if (l - zl[0] - zl[1] <= lax / 3)
                    {
                        ind.clear();
                        for (int i = 0; i < l; ++i)
                            if (s[i] == '?')
                                ind.push_back(i);
                        int msk = 0;
                        for (int i = 0; i < l; ++i)
                            if (s[i] == '1')
                                msk += (1 << i);
                        cout << rek(2, s, 0, msk) << '\n';
                    }
                }
}

Compilation message

snake_escaping.cpp: In function 'int rek(int, std::__cxx11::string&, int, int)':
snake_escaping.cpp:18:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int j = v; j < ind.size(); ++j)
                     ~~^~~~~~~~~~~~
snake_escaping.cpp: In function 'int main()':
snake_escaping.cpp:79:13: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
             if ((1 << i) & j)
             ^~
snake_escaping.cpp:83:17: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
                 for (int i = 0; i < q; ++i)
                 ^~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 3 ms 376 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 3 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 3 ms 376 KB Output is correct
7 Correct 3 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 3 ms 376 KB Output is correct
10 Correct 2 ms 432 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 3 ms 376 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 3 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 3 ms 376 KB Output is correct
7 Correct 3 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 3 ms 376 KB Output is correct
10 Correct 2 ms 432 KB Output is correct
11 Correct 305 ms 5212 KB Output is correct
12 Correct 770 ms 5180 KB Output is correct
13 Correct 842 ms 7088 KB Output is correct
14 Correct 606 ms 14328 KB Output is correct
15 Correct 427 ms 15228 KB Output is correct
16 Correct 494 ms 14328 KB Output is correct
17 Correct 610 ms 14200 KB Output is correct
18 Correct 228 ms 16120 KB Output is correct
19 Correct 766 ms 13164 KB Output is correct
20 Correct 357 ms 14996 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 3 ms 376 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 3 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 3 ms 376 KB Output is correct
7 Correct 3 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 3 ms 376 KB Output is correct
10 Correct 2 ms 432 KB Output is correct
11 Correct 305 ms 5212 KB Output is correct
12 Correct 770 ms 5180 KB Output is correct
13 Correct 842 ms 7088 KB Output is correct
14 Correct 606 ms 14328 KB Output is correct
15 Correct 427 ms 15228 KB Output is correct
16 Correct 494 ms 14328 KB Output is correct
17 Correct 610 ms 14200 KB Output is correct
18 Correct 228 ms 16120 KB Output is correct
19 Correct 766 ms 13164 KB Output is correct
20 Correct 357 ms 14996 KB Output is correct
21 Correct 409 ms 18288 KB Output is correct
22 Correct 749 ms 18464 KB Output is correct
23 Correct 1458 ms 17596 KB Output is correct
24 Correct 908 ms 17308 KB Output is correct
25 Correct 539 ms 19360 KB Output is correct
26 Correct 704 ms 17788 KB Output is correct
27 Correct 789 ms 17684 KB Output is correct
28 Correct 250 ms 20348 KB Output is correct
29 Correct 1326 ms 16356 KB Output is correct
30 Correct 434 ms 18532 KB Output is correct
31 Correct 719 ms 18168 KB Output is correct
32 Correct 704 ms 18168 KB Output is correct
33 Correct 502 ms 17144 KB Output is correct
34 Correct 804 ms 17400 KB Output is correct
35 Correct 787 ms 17784 KB Output is correct
36 Correct 262 ms 16248 KB Output is correct
37 Correct 429 ms 18260 KB Output is correct
38 Correct 956 ms 16312 KB Output is correct
39 Correct 686 ms 17400 KB Output is correct
40 Correct 688 ms 17336 KB Output is correct

Subtask #4
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 3 ms 376 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 3 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 3 ms 376 KB Output is correct
7 Correct 3 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 3 ms 376 KB Output is correct
10 Correct 2 ms 432 KB Output is correct
11 Correct 83 ms 19624 KB Output is correct
12 Correct 86 ms 19500 KB Output is correct
13 Correct 111 ms 19452 KB Output is correct
14 Correct 150 ms 19536 KB Output is correct
15 Correct 97 ms 19792 KB Output is correct
16 Correct 150 ms 19864 KB Output is correct
17 Correct 138 ms 19812 KB Output is correct
18 Correct 66 ms 19988 KB Output is correct
19 Correct 78 ms 19616 KB Output is correct
20 Correct 82 ms 19864 KB Output is correct
21 Correct 111 ms 19864 KB Output is correct
22 Correct 148 ms 19736 KB Output is correct
23 Correct 92 ms 19708 KB Output is correct
24 Correct 153 ms 19864 KB Output is correct
25 Correct 144 ms 19736 KB Output is correct
26 Correct 69 ms 19608 KB Output is correct
27 Correct 83 ms 19860 KB Output is correct
28 Correct 85 ms 19736 KB Output is correct
29 Correct 110 ms 19848 KB Output is correct
30 Correct 148 ms 19736 KB Output is correct
31 Correct 92 ms 19696 KB Output is correct
32 Correct 164 ms 19776 KB Output is correct
33 Correct 141 ms 19740 KB Output is correct
34 Correct 68 ms 18860 KB Output is correct
35 Correct 118 ms 19068 KB Output is correct
36 Correct 127 ms 18968 KB Output is correct
37 Correct 129 ms 19008 KB Output is correct
38 Correct 119 ms 18940 KB Output is correct
39 Correct 123 ms 18984 KB Output is correct
40 Correct 121 ms 19056 KB Output is correct

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 3 ms 376 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 3 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 3 ms 376 KB Output is correct
7 Correct 3 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 3 ms 376 KB Output is correct
10 Correct 2 ms 432 KB Output is correct
11 Correct 305 ms 5212 KB Output is correct
12 Correct 770 ms 5180 KB Output is correct
13 Correct 842 ms 7088 KB Output is correct
14 Correct 606 ms 14328 KB Output is correct
15 Correct 427 ms 15228 KB Output is correct
16 Correct 494 ms 14328 KB Output is correct
17 Correct 610 ms 14200 KB Output is correct
18 Correct 228 ms 16120 KB Output is correct
19 Correct 766 ms 13164 KB Output is correct
20 Correct 357 ms 14996 KB Output is correct
21 Correct 409 ms 18288 KB Output is correct
22 Correct 749 ms 18464 KB Output is correct
23 Correct 1458 ms 17596 KB Output is correct
24 Correct 908 ms 17308 KB Output is correct
25 Correct 539 ms 19360 KB Output is correct
26 Correct 704 ms 17788 KB Output is correct
27 Correct 789 ms 17684 KB Output is correct
28 Correct 250 ms 20348 KB Output is correct
29 Correct 1326 ms 16356 KB Output is correct
30 Correct 434 ms 18532 KB Output is correct
31 Correct 719 ms 18168 KB Output is correct
32 Correct 704 ms 18168 KB Output is correct
33 Correct 502 ms 17144 KB Output is correct
34 Correct 804 ms 17400 KB Output is correct
35 Correct 787 ms 17784 KB Output is correct
36 Correct 262 ms 16248 KB Output is correct
37 Correct 429 ms 18260 KB Output is correct
38 Correct 956 ms 16312 KB Output is correct
39 Correct 686 ms 17400 KB Output is correct
40 Correct 688 ms 17336 KB Output is correct
41 Correct 83 ms 19624 KB Output is correct
42 Correct 86 ms 19500 KB Output is correct
43 Correct 111 ms 19452 KB Output is correct
44 Correct 150 ms 19536 KB Output is correct
45 Correct 97 ms 19792 KB Output is correct
46 Correct 150 ms 19864 KB Output is correct
47 Correct 138 ms 19812 KB Output is correct
48 Correct 66 ms 19988 KB Output is correct
49 Correct 78 ms 19616 KB Output is correct
50 Correct 82 ms 19864 KB Output is correct
51 Correct 111 ms 19864 KB Output is correct
52 Correct 148 ms 19736 KB Output is correct
53 Correct 92 ms 19708 KB Output is correct
54 Correct 153 ms 19864 KB Output is correct
55 Correct 144 ms 19736 KB Output is correct
56 Correct 69 ms 19608 KB Output is correct
57 Correct 83 ms 19860 KB Output is correct
58 Correct 85 ms 19736 KB Output is correct
59 Correct 110 ms 19848 KB Output is correct
60 Correct 148 ms 19736 KB Output is correct
61 Correct 92 ms 19696 KB Output is correct
62 Correct 164 ms 19776 KB Output is correct
63 Correct 141 ms 19740 KB Output is correct
64 Correct 68 ms 18860 KB Output is correct
65 Correct 118 ms 19068 KB Output is correct
66 Correct 127 ms 18968 KB Output is correct
67 Correct 129 ms 19008 KB Output is correct
68 Correct 119 ms 18940 KB Output is correct
69 Correct 123 ms 18984 KB Output is correct
70 Correct 121 ms 19056 KB Output is correct
71 Correct 720 ms 44596 KB Output is correct
72 Correct 790 ms 44644 KB Output is correct
73 Correct 1274 ms 43416 KB Output is correct
74 Execution timed out 2009 ms 38864 KB Time limit exceeded
75 Halted 0 ms 0 KB -