Submission #1175626

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1175626	2025-03-29 02:17:07	TrendBattles	Snake Escaping (JOI18_snake_escaping)	C++17	12 / 100	144 ms	5704 KiB

snake_escaping

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
#include <bits/stdc++.h>
using namespace std;
using lli = long long int;
#define INFILE "snake.inp"
#define OUTFILE "snake.out"
namespace SUBTASK_small_L {
    void main(int L, int Q, string digits) {
        vector <int> pow_3(L + 1);
        pow_3[0] = 1;
        for (int i = 1; i <= L; ++i) {
            pow_3[i] = pow_3[i - 1] * 3;
        }
        const int M = pow_3[L];
        vector <int> mask_3(1 << L);
        vector <int> finale(M);
        for (int m = 1; m < (1 << L); ++m) {
            int p = m & -m;
            mask_3[m] = mask_3[m ^ p] + pow_3[__builtin_ctz(p)];
        }
        for (int m = 0; m < (1 << L); ++m) {
            int x = digits[m] - '0';
            for (int p = 0; p < (1 << L); ++p) {
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Compilation message (stderr)

snake_escaping.cpp: In function 'int main()':
snake_escaping.cpp:217:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  217 |         freopen(INFILE, "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~
snake_escaping.cpp:218:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  218 |         freopen(OUTFILE, "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
snake_escaping.cpp: In function 'void SUBTASK_main::main(int, int, std::string)':
snake_escaping.cpp:126:24: warning: iteration 16384 invokes undefined behavior [-Waggressive-loop-optimizations]
  126 |             bit_cnt[m] = bit_cnt[m >> 1] ^ (m & 1);
      |             ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
snake_escaping.cpp:125:27: note: within this loop
  125 |         for (int m = 0; m < (1 << MAX_BIT); ++m) {
      |                         ~~^~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 0 / 10
• Subtask 4: 0 / 53
• Subtask 5: 0 / 25