oj.uz

Submission #322259

# Submission time Handle Problem Language Result Execution time Memory
322259 2020-11-14T10:45:56 Z dolphingarlic Swap (BOI16_swap) C++14
68 / 100
 937 ms 262148 KB 
#include <bits/stdc++.h>
using namespace std;

int a[200002];
bool needed[200002][18][2];
vector<int> dp[200002][18][2], tmp;

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 = n / 2; node; node--) {
        for (int i = 0; node >> i; i++) for (int j : {0, 1}) {
            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;

            if (2 * node > n) dp[node][i][j] = {a[((node >> i + 1) << 1) + j]};
            else if (2 * node == n) {
                if (a[((node >> i + 1) << 1) + j] < a[2 * node]) {
                    dp[node][i][j] = {a[((node >> i + 1) << 1) + j], a[2 * node]};
                } else {
                    dp[node][i][j] = {a[2 * node], a[((node >> i + 1) << 1) + j]};
                }
            } else {
                int mn = min({a[((node >> i + 1) << 1) + j], a[2 * node], a[2 * node + 1]});
                if (mn == a[((node >> i + 1) << 1) + j]) {
                    dp[node][i][j] = {a[((node >> i + 1) << 1) + j]};
                    merge(dp[node][i][j], dp[2 * node][0][0], dp[2 * node + 1][0][1]);
                } else if (mn == a[2 * node]) {
                    dp[node][i][j] = {a[2 * node]};
                    merge(dp[node][i][j], dp[2 * node][i + 1][j], dp[2 * node + 1][0][1]);
                } else {
                    dp[node][i][j] = tmp = {a[2 * node + 1]};
                    merge(dp[node][i][j], dp[2 * node][0][0], dp[2 * node + 1][i + 1][j]);
                    merge(tmp, dp[2 * node][i + 1][j], dp[2 * node + 1][0][0]);
                    dp[node][i][j] = min(dp[node][i][j], tmp);
                }
            }
        }
        if (2 * node <= n) {
            for (int i = 0; 2 * node >> i; i++) for (int j : {0, 1}) {
                vector<int>().swap(dp[2 * node][i][j]);
                vector<int>().swap(dp[2 * node + 1][i][j]);
            }
        }
    }

    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:9:30: 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:10:40: 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:11:40: 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:23:41: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   23 |             int mn = min({a[((node >> i + 1) << 1) + j], a[2 * node], a[2 * node + 1]});
      |                                       ~~^~~
swap.cpp:24:37: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   24 |             if (mn == a[((node >> i + 1) << 1) + j]) {
      |                                   ~~^~~
swap.cpp:39:63: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   39 |             if (2 * node > n) dp[node][i][j] = {a[((node >> i + 1) << 1) + j]};
      |                                                             ~~^~~
swap.cpp:41:35: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   41 |                 if (a[((node >> i + 1) << 1) + j] < a[2 * node]) {
      |                                 ~~^~~
swap.cpp:42:53: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   42 |                     dp[node][i][j] = {a[((node >> i + 1) << 1) + j], a[2 * node]};
      |                                                   ~~^~~
swap.cpp:44:66: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   44 |                     dp[node][i][j] = {a[2 * node], a[((node >> i + 1) << 1) + j]};
      |                                                                ~~^~~
swap.cpp:47:45: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   47 |                 int mn = min({a[((node >> i + 1) << 1) + j], a[2 * node], a[2 * node + 1]});
      |                                           ~~^~~
swap.cpp:48:41: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   48 |                 if (mn == a[((node >> i + 1) << 1) + j]) {
      |                                       ~~^~~
swap.cpp:49:53: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   49 |                     dp[node][i][j] = {a[((node >> i + 1) << 1) + j]};
      |                                                   ~~^~~
swap.cpp:17:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   17 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
swap.cpp:18:39: 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 98 ms 169416 KB Output is correct
2 Correct 103 ms 169452 KB Output is correct
3 Correct 101 ms 169452 KB Output is correct
4 Correct 98 ms 169452 KB Output is correct
5 Correct 100 ms 169452 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 98 ms 169416 KB Output is correct
2 Correct 103 ms 169452 KB Output is correct
3 Correct 101 ms 169452 KB Output is correct
4 Correct 98 ms 169452 KB Output is correct
5 Correct 100 ms 169452 KB Output is correct
6 Correct 99 ms 169460 KB Output is correct
7 Correct 102 ms 169428 KB Output is correct
8 Correct 103 ms 169452 KB Output is correct
9 Correct 101 ms 169452 KB Output is correct
10 Correct 103 ms 169452 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 98 ms 169416 KB Output is correct
2 Correct 103 ms 169452 KB Output is correct
3 Correct 101 ms 169452 KB Output is correct
4 Correct 98 ms 169452 KB Output is correct
5 Correct 100 ms 169452 KB Output is correct
6 Correct 99 ms 169460 KB Output is correct
7 Correct 102 ms 169428 KB Output is correct
8 Correct 103 ms 169452 KB Output is correct
9 Correct 101 ms 169452 KB Output is correct
10 Correct 103 ms 169452 KB Output is correct
11 Correct 104 ms 169652 KB Output is correct
12 Correct 104 ms 169580 KB Output is correct
13 Correct 101 ms 169708 KB Output is correct
14 Correct 108 ms 169836 KB Output is correct
15 Correct 105 ms 169828 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 98 ms 169416 KB Output is correct
2 Correct 103 ms 169452 KB Output is correct
3 Correct 101 ms 169452 KB Output is correct
4 Correct 98 ms 169452 KB Output is correct
5 Correct 100 ms 169452 KB Output is correct
6 Correct 99 ms 169460 KB Output is correct
7 Correct 102 ms 169428 KB Output is correct
8 Correct 103 ms 169452 KB Output is correct
9 Correct 101 ms 169452 KB Output is correct
10 Correct 103 ms 169452 KB Output is correct
11 Correct 104 ms 169652 KB Output is correct
12 Correct 104 ms 169580 KB Output is correct
13 Correct 101 ms 169708 KB Output is correct
14 Correct 108 ms 169836 KB Output is correct
15 Correct 105 ms 169828 KB Output is correct
16 Correct 272 ms 183520 KB Output is correct
17 Correct 264 ms 182768 KB Output is correct
18 Correct 283 ms 184300 KB Output is correct
19 Correct 412 ms 195052 KB Output is correct
20 Correct 427 ms 195052 KB Output is correct

Subtask #5
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 98 ms 169416 KB Output is correct
2 Correct 103 ms 169452 KB Output is correct
3 Correct 101 ms 169452 KB Output is correct
4 Correct 98 ms 169452 KB Output is correct
5 Correct 100 ms 169452 KB Output is correct
6 Correct 99 ms 169460 KB Output is correct
7 Correct 102 ms 169428 KB Output is correct
8 Correct 103 ms 169452 KB Output is correct
9 Correct 101 ms 169452 KB Output is correct
10 Correct 103 ms 169452 KB Output is correct
11 Correct 104 ms 169652 KB Output is correct
12 Correct 104 ms 169580 KB Output is correct
13 Correct 101 ms 169708 KB Output is correct
14 Correct 108 ms 169836 KB Output is correct
15 Correct 105 ms 169828 KB Output is correct
16 Correct 272 ms 183520 KB Output is correct
17 Correct 264 ms 182768 KB Output is correct
18 Correct 283 ms 184300 KB Output is correct
19 Correct 412 ms 195052 KB Output is correct
20 Correct 427 ms 195052 KB Output is correct
21 Correct 909 ms 233368 KB Output is correct
22 Correct 937 ms 235244 KB Output is correct
23 Correct 906 ms 233052 KB Output is correct
24 Runtime error 298 ms 262148 KB Execution killed with signal 9 (could be triggered by violating memory limits)
25 Halted 0 ms 0 KB -