Problems
172
include<iostream>
using namespace std; int main(){
int n,i,j,b=0,c=0,d=0;
cin>>n;
int a [n];
for ( i=1;i<=n;i++){
cin>>a[i];
}
for (i=1;i<=n;i++){
for (j=1;j<=n;j++){
if (a[j]==a[i]){
b++;
}
}
if (b>1){
for (j=1;j<=i;j++){
if(a[i]==a[j]) {
d++;
}
}
if(d==1) {
cout<<a[i]<<' ';
}
c++;
}
d=0;
b=0;
}
if(c<1){
cout<<"NO";
} return 0; } //TECHNOBLADE NEVER DIE