Submission #122986

#	Time	Username	Problem	Language	Result	Execution time	Memory
122986		thebes	Swap (BOI16_swap)	C++14	0 / 100	2 ms	504 KiB

swap

#include <bits/stdc++.h>
using namespace std;

const int MN = 2e5+5;
vector<int> tmp;
int arr[MN], n, i, j, p[MN];

int main(){
    for(scanf("%d",&n),i=1;i<=n;i++)
        scanf("%d",&arr[i]);
    for(i=1;i<=n;i++){
        p[i]=1<<30;
        if(2*i<=n) p[i]=min(p[i],arr[2*i]);
        if(2*i+1<=n) p[i]=min(p[i],arr[2*i+1]);
    }
    for(i=1;i<=n;i++){
        if(2*i>n) continue;
        else if(2*i+1>n){
            if(arr[2*i]<arr[i]) swap(arr[i],arr[2*i]);
        }
        else{
            if(arr[2*i+1]<arr[i]&&arr[2*i+1]<arr[2*i]){
                swap(arr[i],arr[2*i+1]);
                int a = min(arr[2*i],arr[2*i+1]), b = max(arr[2*i],arr[2*i+1]);
                if(a<p[2*i]) arr[2*i]=a,arr[2*i+1]=b;
                else if(a<p[2*i+1]) arr[2*i+1]=a,arr[2*i]=b;
                else arr[2*i]=a,arr[2*i+1]=b;
            }
            else{
                if(arr[2*i]<arr[i]) swap(arr[2*i],arr[i]);
                if(arr[2*i+1]<arr[i]) swap(arr[2*i+1],arr[i]);
            }
        }
    }
    for(i=1;i<=n;i++)
        printf("%d ",arr[i]);
    printf("\n");
    return 0;
}

Compilation message (stderr)

swap.cpp: In function 'int main()':
swap.cpp:9:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(scanf("%d",&n),i=1;i<=n;i++)
         ~~~~~~~~~~~~~~^~~~
swap.cpp:10:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&arr[i]);
         ~~~~~^~~~~~~~~~~~~~

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