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Submission #998842

# Submission time Handle Problem Language Result Execution time Memory
998842 2024-06-14T17:35:46 Z underwaterkillerwhale Swap (BOI16_swap) C++17
68 / 100
 240 ms 262144 KB 
#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]) {
					needed[2 * node][i + 1][j] = needed[2 * node + 1][0][1] = 1;
				} else {
					needed[2 * node][0][0] = needed[2 * node][i + 1][j] = 1;
					needed[2 * node + 1][0][0] =
					    needed[2 * node + 1][i + 1][j] = 1;
				}
			}
	}

	for (int node = n; node; node--) {
		for (int i = 0; node >> i; i++)
			for (int j : {0, 1}) {
				if (!needed[node][i][j]) continue;

				int p = ((node >> i + 1) << 1) + j;
				if (2 * node > n) dp[node][i][j] = {a[p]};
				else if (2 * node == n) {
					dp[node][i][j] = {min(a[p], a[2 * node]),
					                  max(a[p], a[2 * node])};
				} else {
					if (a[2 * node + 1] < min(a[p], a[2 * node])) {
						tmp1 = tmp2 = {a[2 * node + 1]};
						merge(tmp1, dp[2 * node][0][0],
						      dp[2 * node + 1][i + 1][j]);
						merge(tmp2, dp[2 * node][i + 1][j],
						      dp[2 * node + 1][0][0]);
						dp[node][i][j] = min(tmp1, tmp2);
					} else {
						dp[node][i][j] = {min(a[p], a[2 * node])};
						if (a[p] < a[2 * node]) {
							merge(dp[node][i][j], dp[2 * node][0][0],
							      dp[2 * node + 1][0][1]);
						} else {
							merge(dp[node][i][j], dp[2 * node][i + 1][j],
							      dp[2 * node + 1][0][1]);
						}
					}
				}
			}
	
	}

	for (int i : dp[1][0][1]) printf("%d ", i);
	return 0;
}

Compilation message

swap.cpp: In function 'void merge(std::vector<int>&, std::vector<int>&, std::vector<int>&)':
swap.cpp:9:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |  for (int i = 0, j = 1; i < l.size(); i += j, j <<= 1) {
      |                         ~~^~~~~~~~~~
swap.cpp:10:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |   for (int k = i; k < i + j && k < l.size(); k++) ret.push_back(l[k]);
      |                                ~~^~~~~~~~~~
swap.cpp:11:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |   for (int k = i; k < i + j && k < r.size(); k++) ret.push_back(r[k]);
      |                                ~~^~~~~~~~~~
swap.cpp: In function 'int main()':
swap.cpp:26:33: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   26 |     int mn = min({a[((node >> i + 1) << 1) + j], a[2 * node],
      |                               ~~^~~
swap.cpp:28:29: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   28 |     if (mn == a[((node >> i + 1) << 1) + j]) {
      |                           ~~^~~
swap.cpp:45:25: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   45 |     int p = ((node >> i + 1) << 1) + j;
      |                       ~~^~~
swap.cpp:17:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
swap.cpp:18:36: 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
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 58 ms 169300 KB Output is correct
2 Correct 60 ms 169376 KB Output is correct
3 Correct 62 ms 169296 KB Output is correct
4 Correct 62 ms 169300 KB Output is correct
5 Correct 64 ms 169448 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 58 ms 169300 KB Output is correct
2 Correct 60 ms 169376 KB Output is correct
3 Correct 62 ms 169296 KB Output is correct
4 Correct 62 ms 169300 KB Output is correct
5 Correct 64 ms 169448 KB Output is correct
6 Correct 61 ms 169296 KB Output is correct
7 Correct 63 ms 169300 KB Output is correct
8 Correct 65 ms 169296 KB Output is correct
9 Correct 79 ms 169356 KB Output is correct
10 Correct 67 ms 169304 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 58 ms 169300 KB Output is correct
2 Correct 60 ms 169376 KB Output is correct
3 Correct 62 ms 169296 KB Output is correct
4 Correct 62 ms 169300 KB Output is correct
5 Correct 64 ms 169448 KB Output is correct
6 Correct 61 ms 169296 KB Output is correct
7 Correct 63 ms 169300 KB Output is correct
8 Correct 65 ms 169296 KB Output is correct
9 Correct 79 ms 169356 KB Output is correct
10 Correct 67 ms 169304 KB Output is correct
11 Correct 66 ms 169496 KB Output is correct
12 Correct 73 ms 169556 KB Output is correct
13 Correct 67 ms 169504 KB Output is correct
14 Correct 67 ms 169812 KB Output is correct
15 Correct 65 ms 169812 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 58 ms 169300 KB Output is correct
2 Correct 60 ms 169376 KB Output is correct
3 Correct 62 ms 169296 KB Output is correct
4 Correct 62 ms 169300 KB Output is correct
5 Correct 64 ms 169448 KB Output is correct
6 Correct 61 ms 169296 KB Output is correct
7 Correct 63 ms 169300 KB Output is correct
8 Correct 65 ms 169296 KB Output is correct
9 Correct 79 ms 169356 KB Output is correct
10 Correct 67 ms 169304 KB Output is correct
11 Correct 66 ms 169496 KB Output is correct
12 Correct 73 ms 169556 KB Output is correct
13 Correct 67 ms 169504 KB Output is correct
14 Correct 67 ms 169812 KB Output is correct
15 Correct 65 ms 169812 KB Output is correct
16 Correct 102 ms 180520 KB Output is correct
17 Correct 102 ms 180172 KB Output is correct
18 Correct 98 ms 180688 KB Output is correct
19 Correct 158 ms 211788 KB Output is correct
20 Correct 160 ms 211272 KB Output is correct

Subtask #5
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 58 ms 169300 KB Output is correct
2 Correct 60 ms 169376 KB Output is correct
3 Correct 62 ms 169296 KB Output is correct
4 Correct 62 ms 169300 KB Output is correct
5 Correct 64 ms 169448 KB Output is correct
6 Correct 61 ms 169296 KB Output is correct
7 Correct 63 ms 169300 KB Output is correct
8 Correct 65 ms 169296 KB Output is correct
9 Correct 79 ms 169356 KB Output is correct
10 Correct 67 ms 169304 KB Output is correct
11 Correct 66 ms 169496 KB Output is correct
12 Correct 73 ms 169556 KB Output is correct
13 Correct 67 ms 169504 KB Output is correct
14 Correct 67 ms 169812 KB Output is correct
15 Correct 65 ms 169812 KB Output is correct
16 Correct 102 ms 180520 KB Output is correct
17 Correct 102 ms 180172 KB Output is correct
18 Correct 98 ms 180688 KB Output is correct
19 Correct 158 ms 211788 KB Output is correct
20 Correct 160 ms 211272 KB Output is correct
21 Correct 214 ms 217028 KB Output is correct
22 Correct 207 ms 217792 KB Output is correct
23 Correct 210 ms 218176 KB Output is correct
24 Runtime error 240 ms 262144 KB Execution killed with signal 9
25 Halted 0 ms 0 KB -