Submission #587252

#	Time	Username	Problem	Language	Result	Execution time	Memory
587252		krit3379	Swap (BOI16_swap)	C++17	0 / 100	1 ms	212 KiB

swap

#include<bits/stdc++.h>
using namespace std;
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#define N 200005

int a[N],b[N];
bitset<N> vis;
priority_queue<int,vector<int>,greater<int>> q;

int main(){
    int n,i,mi;
    scanf("%d",&n);
    for(i=1;i<=n;i++)scanf("%d",&a[i]);
    if(n%2==0)a[n+1]=1e9;
    for(i=1;i*2<=n;i++){
        mi=min({a[i],a[i*2],a[i*2+1]});
        if(b[i]||q.empty()||q.top()>mi){
            if(mi==a[i])b[i]=a[i],b[i*2]=a[i*2],b[i*2+1]=a[i*2+1];
            else if(mi==a[i*2])b[i]=a[i*2],b[i*2]=a[i],b[i*2+1]=a[i*2+1];
            else b[i]=a[i*2+1],q.push(a[i]),vis[i*2+1]=true;
        }
        else{
            b[i]=q.top();
            q.pop();
            q.push(a[i]);
        }
    }
    for(;i<=n;i++){
        if(!vis[i])q.push(a[i]);
        if(!b[i])b[i]=q.top(),q.pop();
    }
    for(i=1;i<=n;i++)printf("%d ",b[i]);
    return 0;
}

Compilation message (stderr)

swap.cpp: In function 'int main()':
swap.cpp:13:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
swap.cpp:14:27: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |     for(i=1;i<=n;i++)scanf("%d",&a[i]);
      |                      ~~~~~^~~~~~~~~~~~

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