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답안 #469427

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
469427 2021-09-01T00:59:02 Z cpp219 Swap (BOI16_swap) C++14
68 / 100
 643 ms 262148 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];

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];

    for (ll node = n;node;node--){
        for (ll i = 0;node >> i;i++){
            for (auto j : {0,1}){
                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:16:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |     for (ll i = 0,j = 1;i < a.size();i += j,j *= 2){
      |                         ~~^~~~~~~~~~
swap.cpp:17:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |         for (ll k = i;k < i + j && k < a.size();k++) res.push_back(a[k]);
      |                                    ~~^~~~~~~~~~
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 < b.size();k++) res.push_back(b[k]);
      |                                    ~~^~~~~~~~~~
swap.cpp: In function 'int main()':
swap.cpp:35:36: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   35 |                 ll p = ((node >> i + 1) << 1) + j;
      |                                  ~~^~~
swap.cpp:26:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |         freopen(task".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 90 ms 169412 KB Output is correct
2 Correct 90 ms 169320 KB Output is correct
3 Correct 89 ms 169332 KB Output is correct
4 Correct 100 ms 169284 KB Output is correct
5 Correct 90 ms 169372 KB Output is correct

Subtask #2
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 90 ms 169412 KB Output is correct
2 Correct 90 ms 169320 KB Output is correct
3 Correct 89 ms 169332 KB Output is correct
4 Correct 100 ms 169284 KB Output is correct
5 Correct 90 ms 169372 KB Output is correct
6 Correct 91 ms 169372 KB Output is correct
7 Correct 91 ms 169396 KB Output is correct
8 Correct 89 ms 169384 KB Output is correct
9 Correct 88 ms 169288 KB Output is correct
10 Correct 89 ms 169284 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 90 ms 169412 KB Output is correct
2 Correct 90 ms 169320 KB Output is correct
3 Correct 89 ms 169332 KB Output is correct
4 Correct 100 ms 169284 KB Output is correct
5 Correct 90 ms 169372 KB Output is correct
6 Correct 91 ms 169372 KB Output is correct
7 Correct 91 ms 169396 KB Output is correct
8 Correct 89 ms 169384 KB Output is correct
9 Correct 88 ms 169288 KB Output is correct
10 Correct 89 ms 169284 KB Output is correct
11 Correct 99 ms 169836 KB Output is correct
12 Correct 102 ms 169656 KB Output is correct
13 Correct 107 ms 169752 KB Output is correct
14 Correct 95 ms 169756 KB Output is correct
15 Correct 94 ms 169696 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 90 ms 169412 KB Output is correct
2 Correct 90 ms 169320 KB Output is correct
3 Correct 89 ms 169332 KB Output is correct
4 Correct 100 ms 169284 KB Output is correct
5 Correct 90 ms 169372 KB Output is correct
6 Correct 91 ms 169372 KB Output is correct
7 Correct 91 ms 169396 KB Output is correct
8 Correct 89 ms 169384 KB Output is correct
9 Correct 88 ms 169288 KB Output is correct
10 Correct 89 ms 169284 KB Output is correct
11 Correct 99 ms 169836 KB Output is correct
12 Correct 102 ms 169656 KB Output is correct
13 Correct 107 ms 169752 KB Output is correct
14 Correct 95 ms 169756 KB Output is correct
15 Correct 94 ms 169696 KB Output is correct
16 Correct 476 ms 194744 KB Output is correct
17 Correct 486 ms 194688 KB Output is correct
18 Correct 469 ms 194684 KB Output is correct
19 Correct 643 ms 194696 KB Output is correct
20 Correct 584 ms 194688 KB Output is correct

Subtask #5
0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Correct 90 ms 169412 KB Output is correct
2 Correct 90 ms 169320 KB Output is correct
3 Correct 89 ms 169332 KB Output is correct
4 Correct 100 ms 169284 KB Output is correct
5 Correct 90 ms 169372 KB Output is correct
6 Correct 91 ms 169372 KB Output is correct
7 Correct 91 ms 169396 KB Output is correct
8 Correct 89 ms 169384 KB Output is correct
9 Correct 88 ms 169288 KB Output is correct
10 Correct 89 ms 169284 KB Output is correct
11 Correct 99 ms 169836 KB Output is correct
12 Correct 102 ms 169656 KB Output is correct
13 Correct 107 ms 169752 KB Output is correct
14 Correct 95 ms 169756 KB Output is correct
15 Correct 94 ms 169696 KB Output is correct
16 Correct 476 ms 194744 KB Output is correct
17 Correct 486 ms 194688 KB Output is correct
18 Correct 469 ms 194684 KB Output is correct
19 Correct 643 ms 194696 KB Output is correct
20 Correct 584 ms 194688 KB Output is correct
21 Runtime error 261 ms 262148 KB Execution killed with signal 9
22 Halted 0 ms 0 KB -