Submission #573130

#	Time	Username	Problem	Language	Result	Execution time	Memory
573130		duypd4206	Swap (BOI16_swap)	C++14	0 / 100	2 ms	340 KiB

swap

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

#define x first
#define y second
#define pb push_back
typedef pair<int,int> ii;
using ll = long long ;

const int maxn = 1e5 + 1;
const int oo = 1e9 + 7;
const ll ooo = 2e18 + 7;
const int mod = 1e9 + 7;
int a[maxn];
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
#ifndef ONLINE_JUDGE
#define file ""
    freopen(file"inp","r",stdin);
    freopen(file"out","w",stdout);
#endif //ONLINE_JUDGE
    int n;
    cin >> n;
    for(int i = 1; i <= n; i++)
        cin >> a[i];
    for(int i = 2; i <= n; i+=2){
        int k = i/2;
        int mn = min({a[k], a[i], a[i+1]});
        if(a[k] == mn) continue;
        if(a[i] == mn)
        {
            swap(a[i], a[k]);
            continue;
        }
        if(a[i] < a[k]) swap(a[i], a[k]), swap(a[k], a[i+1]);
        else swap(a[k], a[i+1]);
    }
    for(int i = 1; i <= n; i++)
        cout << a[i] << " ";
}

Compilation message (stderr)

swap.cpp: In function 'int main()':
swap.cpp:21:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |     freopen(file"inp","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
swap.cpp:22:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |     freopen(file"out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

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