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답안 #469435

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
469435 2021-09-01T01:24:16 Z cpp219 Swap (BOI16_swap) C++14
68 / 100
 1000 ms 232360 KB 
#include<bits/stdc++.h>
#define ll int
#define ld long double
#define fs first
#define sc second
#define debug(y) cout<<y,exit(0)
using namespace std;
typedef pair<ll,ll> LL;
const ll N = 2e5 + 9;
const ll inf = 1e9 + 7;

vector<ll> dp[N][18][2];
ll n,a[N];
bool need[N][18][2];

void Merge(vector<ll> &res,vector<ll> a,vector<ll> b){
    for (ll i = 0,j = 1;i < a.size();i += j,j *= 2){
        for (ll k = i;k < i + j && k < a.size();k++) res.push_back(a[k]);
        for (ll k = i;k < i + j && k < b.size();k++) res.push_back(b[k]);
    }
}

int main(){
    ios_base::sync_with_stdio(NULL); cin.tie(0); cout.tie(0);
    #define task "test"
    if (fopen(task".inp","r")){
        freopen(task".inp","r",stdin);
        //freopen(task".out","w",stdout);
    }
    cin>>n;
    for (ll i = 1;i <= n;i++) cin>>a[i];
    need[1][0][1] = 1;

    for (ll node = 1;node <= n/2;node++){
        for (ll i = 0;node >> i;i++){
            for (auto j : {0,1}){
                if (!need[node][i][j]) continue;
                ll p = ((node >> i + 1) << 1) + j;
                ll mn = min({a[p],a[node*2],a[node*2 + 1]});
                if (mn == a[node*2])
                    need[2*node][i + 1][j] = need[2*node + 1][0][1] = 1;
                else if (mn == a[p])
                    need[2*node][0][0] = need[2*node + 1][0][1] = 1;
                else
                    need[2*node][0][0] = need[2*node + 1][0][0] = 1,
                    need[2*node][i + 1][j] = need[2*node + 1][i + 1][j] = 1;
            }
        }
    }

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

                ll 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[node*2]),max(a[p],a[node*2])};
                else{
                    ll mn = min({a[p],a[2*node],a[2*node + 1]});
                    if (mn == a[2*node + 1]){
                        vector<ll> tmp1,tmp2; 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 (mn == a[p])
                            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]);
                    }
                }
            }
        }
        if (2*node < n){
            for (ll i = 0;2*node >> i;i++){
                for (auto j : {0,1})
                    vector<ll>().swap(dp[2*node][i][j]),
                    vector<ll>().swap(dp[2*node + 1][i][j]);
            }
        }
    }
    for (auto i : dp[1][0][1]) cout<<i<<" ";
}

/* stuff you should look for
	* int overflow, array bounds
	* special cases (n=1?)
	* do smth instead of nothing and stay organized
	* WRITE STUFF DOWN
	* DON'T GET STUCK ON ONE APPROACH
*/

Compilation message

swap.cpp: In function 'void Merge(std::vector<int>&, std::vector<int>, std::vector<int>)':
swap.cpp:17:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |     for (ll i = 0,j = 1;i < a.size();i += j,j *= 2){
      |                         ~~^~~~~~~~~~
swap.cpp:18:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |         for (ll k = i;k < i + j && k < a.size();k++) res.push_back(a[k]);
      |                                    ~~^~~~~~~~~~
swap.cpp:19:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |         for (ll k = i;k < i + j && k < b.size();k++) res.push_back(b[k]);
      |                                    ~~^~~~~~~~~~
swap.cpp: In function 'int main()':
swap.cpp:38:36: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   38 |                 ll p = ((node >> i + 1) << 1) + j;
      |                                  ~~^~~
swap.cpp:56:36: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   56 |                 ll p = ((node >> i + 1) << 1) + j;
      |                                  ~~^~~
swap.cpp:27:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |         freopen(task".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 88 ms 169288 KB Output is correct
2 Correct 90 ms 169324 KB Output is correct
3 Correct 89 ms 169408 KB Output is correct
4 Correct 88 ms 169284 KB Output is correct
5 Correct 89 ms 169392 KB Output is correct

Subtask #2
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 88 ms 169288 KB Output is correct
2 Correct 90 ms 169324 KB Output is correct
3 Correct 89 ms 169408 KB Output is correct
4 Correct 88 ms 169284 KB Output is correct
5 Correct 89 ms 169392 KB Output is correct
6 Correct 101 ms 169292 KB Output is correct
7 Correct 90 ms 169284 KB Output is correct
8 Correct 88 ms 169284 KB Output is correct
9 Correct 91 ms 169396 KB Output is correct
10 Correct 91 ms 169300 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 88 ms 169288 KB Output is correct
2 Correct 90 ms 169324 KB Output is correct
3 Correct 89 ms 169408 KB Output is correct
4 Correct 88 ms 169284 KB Output is correct
5 Correct 89 ms 169392 KB Output is correct
6 Correct 101 ms 169292 KB Output is correct
7 Correct 90 ms 169284 KB Output is correct
8 Correct 88 ms 169284 KB Output is correct
9 Correct 91 ms 169396 KB Output is correct
10 Correct 91 ms 169300 KB Output is correct
11 Correct 88 ms 169444 KB Output is correct
12 Correct 91 ms 169528 KB Output is correct
13 Correct 90 ms 169408 KB Output is correct
14 Correct 92 ms 169668 KB Output is correct
15 Correct 92 ms 169612 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 88 ms 169288 KB Output is correct
2 Correct 90 ms 169324 KB Output is correct
3 Correct 89 ms 169408 KB Output is correct
4 Correct 88 ms 169284 KB Output is correct
5 Correct 89 ms 169392 KB Output is correct
6 Correct 101 ms 169292 KB Output is correct
7 Correct 90 ms 169284 KB Output is correct
8 Correct 88 ms 169284 KB Output is correct
9 Correct 91 ms 169396 KB Output is correct
10 Correct 91 ms 169300 KB Output is correct
11 Correct 88 ms 169444 KB Output is correct
12 Correct 91 ms 169528 KB Output is correct
13 Correct 90 ms 169408 KB Output is correct
14 Correct 92 ms 169668 KB Output is correct
15 Correct 92 ms 169612 KB Output is correct
16 Correct 161 ms 173776 KB Output is correct
17 Correct 168 ms 173812 KB Output is correct
18 Correct 161 ms 173988 KB Output is correct
19 Correct 360 ms 183644 KB Output is correct
20 Correct 367 ms 183500 KB Output is correct

Subtask #5
0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Correct 88 ms 169288 KB Output is correct
2 Correct 90 ms 169324 KB Output is correct
3 Correct 89 ms 169408 KB Output is correct
4 Correct 88 ms 169284 KB Output is correct
5 Correct 89 ms 169392 KB Output is correct
6 Correct 101 ms 169292 KB Output is correct
7 Correct 90 ms 169284 KB Output is correct
8 Correct 88 ms 169284 KB Output is correct
9 Correct 91 ms 169396 KB Output is correct
10 Correct 91 ms 169300 KB Output is correct
11 Correct 88 ms 169444 KB Output is correct
12 Correct 91 ms 169528 KB Output is correct
13 Correct 90 ms 169408 KB Output is correct
14 Correct 92 ms 169668 KB Output is correct
15 Correct 92 ms 169612 KB Output is correct
16 Correct 161 ms 173776 KB Output is correct
17 Correct 168 ms 173812 KB Output is correct
18 Correct 161 ms 173988 KB Output is correct
19 Correct 360 ms 183644 KB Output is correct
20 Correct 367 ms 183500 KB Output is correct
21 Correct 415 ms 188148 KB Output is correct
22 Correct 400 ms 188100 KB Output is correct
23 Correct 480 ms 188240 KB Output is correct
24 Execution timed out 1101 ms 232360 KB Time limit exceeded
25 Halted 0 ms 0 KB -