Submission #201450

#	Time	Username	Problem	Language	Result	Execution time	Memory
201450		red1108	Swap (BOI16_swap)	C++17	100 / 100	781 ms	3832 KiB

swap

#include<bits/stdc++.h>
#include<ext/rope>
using namespace std;
using namespace __gnu_cxx;
#define fi first
#define se second
#define fastio ios_base::sync_with_stdio(false);cin.tie(0)
#define fopen freopen("input.txt", "r", stdin)
#define eb emplace_back
#define em emplace
#define prec(a) cout<<fixed;cout.precision(a);
#define all(a) (a).begin(), (a).end()
typedef long long ll;typedef long double ld;typedef unsigned long long ul;typedef unsigned int ui;typedef pair<int,int> pii;typedef pair<ll,ll> pll;
typedef tuple<int,int,int> tiii;
const ll INF = 2e18;
const int inf = 2e9;
template<class T>
void pr(T t) {cout << t << " ";}
template<class T, class ...Args>
void pr(T a, Args ...args) {cout << a << " ";pr(args...);}
template<class ...Args>
void prl(Args ...args) {pr(args...);cout << endl;}

int in[200010],n;
int f(int x, int v){
	if(x>n/2) return x;
	if(v<in[x*2]&&v<in[x*2+1]) return x;
	if(in[x*2]<v&&in[x*2]<in[x*2+1]) return f(x*2,v);
	if(v<in[x*2]) return min(f(x*2,v),f(x*2+1,v));
	else{
		int a = f(x*2,in[x*2]), b = f(x*2+1,in[x*2]);
		if(a<b) return f(x*2+1,v);
		else return f(x*2,v);
	}
}
int main(){
	//freopen("input.txt","r",stdin);
	fastio;
	cin>>n;
	for(int i=1;i<=n;i++) cin>>in[i];
	in[n+1]=n+1;
	for(int i=1;i<=n/2;i++){
		if(in[i]<in[i*2]&&in[i]<in[i*2+1]) continue;
		if(in[i*2]<in[i]&&in[i*2]<in[i*2+1]){swap(in[i],in[i*2]);continue;}

		int x = min(in[i],in[i*2]),y=max(in[i],in[i*2]),z=in[i*2+1];
		int a = f(i*2,x), b = f(i*2+1,x);
		if(a<b) {in[i*2]=x;in[i*2+1]=y;}
		else {in[i*2]=y;in[i*2+1]=x;}
		in[i]=z;
	}
	for(int i=1;i<=n;i++) cout<<in[i]<<" ";
}

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