Submission #140510

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
140510	2019-08-03 09:23:59	wasyl	Snake Escaping (JOI18_snake_escaping)	C++11	75 / 100	2072 ms	25488 KiB

snake_escaping

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#pragma optimize("O3")
#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));
 
 
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Compilation message (stderr)

snake_escaping.cpp:1:0: warning: ignoring #pragma optimize  [-Wunknown-pragmas]
 #pragma optimize("O3")
 
snake_escaping.cpp: In function 'int rek(int, std::__cxx11::string&, int, int)':
snake_escaping.cpp:19:23: 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:80:13: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
             if ((1 << i) & j)
             ^~
snake_escaping.cpp:84:17: 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 / 5
• Subtask 2: 7 / 7
• Subtask 3: 10 / 10
• Subtask 4: 53 / 53
• Subtask 5: 0 / 25