oj.uz

Submission #322256

# Submission time Handle Problem Language Result Execution time Memory
322256 2020-11-14T10:39:05 Z dolphingarlic Swap (BOI16_swap) C++14
68 / 100
 923 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 (node * 2 > n) dp[node][i][j] = {a[((node >> i + 1) << 1) + j]};
            else if (node * 2 == 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 (node * 2 <= n) {
            for (int i = 0; node * 2 >> i; i++) for (int j : {0, 1}) {
                vector<int>().swap(dp[node * 2][i][j]);
                vector<int>().swap(dp[node * 2 + 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 (node * 2 > 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 97 ms 169452 KB Output is correct
2 Correct 109 ms 169452 KB Output is correct
3 Correct 99 ms 169452 KB Output is correct
4 Correct 98 ms 169452 KB Output is correct
5 Correct 99 ms 169452 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 97 ms 169452 KB Output is correct
2 Correct 109 ms 169452 KB Output is correct
3 Correct 99 ms 169452 KB Output is correct
4 Correct 98 ms 169452 KB Output is correct
5 Correct 99 ms 169452 KB Output is correct
6 Correct 97 ms 169452 KB Output is correct
7 Correct 97 ms 169452 KB Output is correct
8 Correct 100 ms 169452 KB Output is correct
9 Correct 98 ms 169452 KB Output is correct
10 Correct 97 ms 169452 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 97 ms 169452 KB Output is correct
2 Correct 109 ms 169452 KB Output is correct
3 Correct 99 ms 169452 KB Output is correct
4 Correct 98 ms 169452 KB Output is correct
5 Correct 99 ms 169452 KB Output is correct
6 Correct 97 ms 169452 KB Output is correct
7 Correct 97 ms 169452 KB Output is correct
8 Correct 100 ms 169452 KB Output is correct
9 Correct 98 ms 169452 KB Output is correct
10 Correct 97 ms 169452 KB Output is correct
11 Correct 101 ms 169600 KB Output is correct
12 Correct 111 ms 169708 KB Output is correct
13 Correct 104 ms 169708 KB Output is correct
14 Correct 102 ms 169708 KB Output is correct
15 Correct 100 ms 169708 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 97 ms 169452 KB Output is correct
2 Correct 109 ms 169452 KB Output is correct
3 Correct 99 ms 169452 KB Output is correct
4 Correct 98 ms 169452 KB Output is correct
5 Correct 99 ms 169452 KB Output is correct
6 Correct 97 ms 169452 KB Output is correct
7 Correct 97 ms 169452 KB Output is correct
8 Correct 100 ms 169452 KB Output is correct
9 Correct 98 ms 169452 KB Output is correct
10 Correct 97 ms 169452 KB Output is correct
11 Correct 101 ms 169600 KB Output is correct
12 Correct 111 ms 169708 KB Output is correct
13 Correct 104 ms 169708 KB Output is correct
14 Correct 102 ms 169708 KB Output is correct
15 Correct 100 ms 169708 KB Output is correct
16 Correct 265 ms 183532 KB Output is correct
17 Correct 254 ms 182892 KB Output is correct
18 Correct 277 ms 184300 KB Output is correct
19 Correct 413 ms 195052 KB Output is correct
20 Correct 416 ms 194968 KB Output is correct

Subtask #5
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 97 ms 169452 KB Output is correct
2 Correct 109 ms 169452 KB Output is correct
3 Correct 99 ms 169452 KB Output is correct
4 Correct 98 ms 169452 KB Output is correct
5 Correct 99 ms 169452 KB Output is correct
6 Correct 97 ms 169452 KB Output is correct
7 Correct 97 ms 169452 KB Output is correct
8 Correct 100 ms 169452 KB Output is correct
9 Correct 98 ms 169452 KB Output is correct
10 Correct 97 ms 169452 KB Output is correct
11 Correct 101 ms 169600 KB Output is correct
12 Correct 111 ms 169708 KB Output is correct
13 Correct 104 ms 169708 KB Output is correct
14 Correct 102 ms 169708 KB Output is correct
15 Correct 100 ms 169708 KB Output is correct
16 Correct 265 ms 183532 KB Output is correct
17 Correct 254 ms 182892 KB Output is correct
18 Correct 277 ms 184300 KB Output is correct
19 Correct 413 ms 195052 KB Output is correct
20 Correct 416 ms 194968 KB Output is correct
21 Correct 895 ms 233452 KB Output is correct
22 Correct 923 ms 235256 KB Output is correct
23 Correct 885 ms 233080 KB Output is correct
24 Runtime error 296 ms 262148 KB Execution killed with signal 9 (could be triggered by violating memory limits)
25 Halted 0 ms 0 KB -