Submission #1136262

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1136262	2025-01-15 12:25:39	byunjaewoo	Swap (BOI16_swap)	C++20	100 / 100	570 ms	232616 KiB

swap

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#include <bits/stdc++.h>
using namespace std;
int a[200002];
bool needed[200002][18][2];
vector<int> dp[200002][18][2], tmp1, tmp2;
void merge(vector<int> &ret, vector<int> &l, vector<int> &r) {
  for (int i = 0, j = 1; i < l.size(); i += j, j <<= 1) {
    for (int k = i; k < i + j && k < l.size(); k++) ret.push_back(l[k]);
    for (int k = i; k < i + j && k < r.size(); k++) ret.push_back(r[k]);
  }
}
int main() {
  int n;
  scanf("%d", &n);
  for (int i = 1; i <= n; i++) scanf("%d", a + i);
  needed[1][0][1] = 1;
  for (int node = 1; node <= n / 2; node++) {
    for (int i = 0; node >> i; i++)
      for (int j : {0, 1}) {
        if (!needed[node][i][j]) continue;
        int mn =
            min({a[((node >> i + 1) << 1) + j], a[2 * node], a[2 * node + 1]});
        if (mn == a[((node >> i + 1) << 1) + j]) {
          needed[2 * node][0][0] = needed[2 * node + 1][0][1] = 1;
        } else if (mn == a[2 * node]) {
 
 
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Compilation message (stderr)

swap.cpp: In function 'int main()':
swap.cpp:17:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |         scanf("%d", &n);
      |         ~~~~~^~~~~~~~~~
swap.cpp:18:43: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |         for (int i = 1; i <= n; i++) scanf("%d", a + i);
      |                                      ~~~~~^~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 11 / 11
• Subtask 3: 27 / 27
• Subtask 4: 20 / 20
• Subtask 5: 32 / 32