Submission #1107204

#	Time	Username	Problem	Language	Result	Execution time	Memory
1107204		koukirocks	Swap (BOI16_swap)	C++17	0 / 100	1 ms	336 KiB

swap

#include <bits/stdc++.h>
#define speed ios_base::sync_with_stdio(0); cin.tie(0)
#define all(x) (x).begin(),(x).end()
#define F first
#define S second
//#pragma GCC optimize("O3,unroll-loops")
//#pragma GCC target("avx,avx2")
//#pragma GCC target("popcnt")
 
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef double db;
typedef long double ldb;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
 
const ll MAX=2e5+10,P=1e9+7;
const ll INF=0x3f3f3f3f,oo=0x3f3f3f3f3f3f3f3f;
const ldb eps=1e-6;
const ldb PI=acos(-1.0);
const int dir[4][2]={{0,1},{0,-1},{1,0},{-1,0}};
template<typename T>
using vvector = vector<vector<T>>;

map<pii,int> rec;
int search(int v,int val,vector<int> &a,int n) {
    if (rec.find({v,val})!=rec.end()) return rec[{v,val}];
    if ((v<<1)<=n) {
        if ((v<<1|1)<=n) {
            int mn = min({val,a[v<<1],a[v<<1|1]});
            if (mn==val) return rec[{v,val}]=v;
            else if (mn==a[v<<1]) return rec[{v,val}]=search(v<<1,val,a,n);
            else {
                int lc=a[v<<1],rc=val;
                if (lc>rc) swap(lc,rc);
                int lp1=search(v<<1,lc,a,n),lp2=search(v<<1|1,lc,a,n);
                if (lp1<lp2) {
                    if (lc==val) return rec[{v,val}]=lp1;
                    else return rec[{v,val}]=search(v<<1|1,val,a,n);
                } else {
                    if (lc==val) return rec[{v,val}]=lp2;
                    else return rec[{v,val}]=search(v<<1,val,a,n);
                }
            }
        } else {
            if (val<a[v<<1]) return rec[{v,val}]=v;
            return rec[{v,val}]=search(v<<1,val,a,n);
        }
    } else return rec[{v,val}]=v;
}

void dfs(int v,int val,vector<int> &ans,vector<int> &a,int n) {
    if ((v<<1)<=n) {
        if ((v<<1|1)<=n) {
            int mn = min({val,a[v<<1],a[v<<1|1]});
            ans[v]=mn;
            if (mn==val) {
                dfs(v<<1,a[v<<1],ans,a,n);
                dfs(v<<1|1,a[v<<1|1],ans,a,n);
            } else if (mn==a[v<<1]) {
                dfs(v<<1,val,ans,a,n);
                dfs(v<<1|1,a[v<<1|1],ans,a,n);
            } else {
                int lc=a[v<<1],rc=val;
                if (lc>rc) swap(lc,rc);
                int lp1=search(v<<1,lc,a,n),lp2=search(v<<1|1,lc,a,n);
                if (lp1<lp2) {
                    dfs(v<<1,lc,ans,a,n);
                    dfs(v<<1|1,rc,ans,a,n);
                } else {
                    dfs(v<<1,rc,ans,a,n);
                    dfs(v<<1|1,lc,ans,a,n);
                }
            }
        } else {
            ans[v]=min(a[v<<1],val);
            dfs(v<<1,max(val,ans[v<<1]),ans,a,n);
        }
    } else ans[v]=val;
}

int main() {
    speed;
    int n;
    cin>>n;
    vector<int> a(n+1);
    for (int i=1;i<=n;i++) {
        cin>>a[i];
    }
    vector<int> ans(n+1);
    dfs(1,a[1],ans,a,n);
    for (int i=1;i<=n;i++) {
        cout<<ans[i]<<" ";
    }
    return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 11
• Subtask 3: 0 / 27
• Subtask 4: 0 / 20
• Subtask 5: 0 / 32