Submission #340118

#	Time	Username	Problem	Language	Result	Execution time	Memory
340118		MilosMilutinovic	medians (balkan11_medians)	C++14	100 / 100	38 ms	2540 KiB

medians

#include <bits/stdc++.h>
using namespace std;
const int N=100050;
int n,a[N],ans[N],mn,mx;
bool was[2*N];
int down(){
    while(was[mx])--mx;
    was[mx]=1;
    return mx;
}
int up(){
    while(was[mn])++mn;
    was[mn]=1;
    return mn;
}
int main(){
    scanf("%i",&n);
    for(int i=1;i<=n;i++)scanf("%i",&a[i]);
    ans[1]=a[1];
    was[a[1]]=1;
    mn=0,mx=2*n;
    was[0]=1,was[2*n]=1;
    for(int i=2;i<=n;i++){
        if(a[i]==a[i-1]){
            ans[2*i-2]=down();
            ans[2*i-1]=up();
        }else{
            if(a[i]>a[i-1]){
                if(was[a[i]]){
                    ans[2*i-2]=down();
                    ans[2*i-1]=down();
                }else{
                    ans[2*i-2]=a[i];
                    was[a[i]]=1;
                    ans[2*i-1]=down();
                }
            }else{
                if(was[a[i]]){
                    ans[2*i-2]=up();
                    ans[2*i-1]=up();
                }else{
                    ans[2*i-2]=a[i];
                    was[a[i]]=1;
                    ans[2*i-1]=up();
                }
            }
        }
    }
    for(int i=1;i<=2*n-1;i++)printf("%i ",ans[i]);
    return 0;
}

Compilation message (stderr)

medians.cpp: In function 'int main()':
medians.cpp:17:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   17 |     scanf("%i",&n);
      |     ~~~~~^~~~~~~~~
medians.cpp:18:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   18 |     for(int i=1;i<=n;i++)scanf("%i",&a[i]);
      |                          ~~~~~^~~~~~~~~~~~

• Subtask 1: 65 / 65
• Subtask 2: 35 / 35