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Wave Sort
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#include<bits/stdc++.h> using namespace std; int main() { vector<int> a; int n; cin>>n; a.resize(n); for(int i=0;i<n;i++) {cin >> a[i];} sort(a.begin(),a.end()); for(int i=1;i<n-1;i+=2) { swap(a[i],a[i+1]); } for(int i=0;i<n;i++) { cout<<a[i]<<" "; } return 0; }
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