Submission #873210

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
873210	2023-11-14 16:01:32	rainboy	Shuffle (NOI19_shuffle)	C++17	48 / 100	2 ms	2652 KiB

shuffle

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#include "shuffle.h"
#include <cstring>
#include <vector>
using namespace std;
const int N = 1000, L = 10; /* L = ceil(log2(N)) */
typedef vector<int> vi;
typedef vector<vi> vvi;
int pp[L], xx[N], idx[N * N], xx_[N];
int uu[N], vv[N];
vi solve(int n, int m, int k, int q, int s) {
  vvi iii(m), aaa;
  vi aa(n);
  if (s == 3) {
    int l = 0, p = 1;
    while (p < n)
      pp[l++] = p, p *= m;
    for (int i = 0; i < n; i++) {
      int d = i % m, x = d;
      for (int h = 1; h < l; h++) {
        int d_ = (i / pp[h] + d) % m;
        x += d_ * pp[h];
      }
      idx[xx[i] = x] = i;
    }
    memset(xx_, 0, n * sizeof *xx_);
 
 
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Compilation message (stderr)

shuffle.cpp: In function 'vi solve(int, int, int, int, int)':
shuffle.cpp:97:36: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   97 |    int x = (i < n - 2 ? i : 1 << l - 1 ^ i & 1) ^ ((i & 1) == 0 ? 0 : (1 << l) - 2);
      |                                  ~~^~~
shuffle.cpp:97:44: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
   97 |    int x = (i < n - 2 ? i : 1 << l - 1 ^ i & 1) ^ ((i & 1) == 0 ? 0 : (1 << l) - 2);
      |                                          ~~^~~

• Subtask 1: 2 / 2
• Subtask 2: 3 / 3
• Subtask 3: 12 / 12
• Subtask 4: 16 / 16
• Subtask 5: 15 / 15
• Subtask 6: 0 / 52