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- #include <iostream>
- #include <vector>
- #include <algorithm>
- using namespace std;
- int main(){
- int n;
- cin>>n;
- vector <int> a(n);
- for (int i=0; i<n; i++){
- cin>>a[i];
- }
- bool b=0;
- for (int i=0; i<n; i++){
- if (a[i]!=a[0]){
- b=1;
- }
- }
- if (b==0){
- cout<<"NO"<<endl;
- return 0;
- }
- sort(a.begin(), a.end());
- for (int i=n-1; i>0; i--){
- if (a[i]!=a[i-1]){
- swap(a[i], a[i-1]);
- break;
- }
- }
- for (int i=0; i<n; i++){
- cout<<a[i];
- }
- }
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