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@gbrls
Created May 29, 2020 00:58
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#include <bits/stdc++.h>
using namespace std;
int main() {
int n;cin>>n;
int arr[n];
int ans=1;
for(int i=0;i<n;i++) cin>>arr[i];
for(int i=1;i<=n;i++) {
for(int j=1;j<=n;j++) {
if(i!=j) {
int f=0;
int accm=0;
for(int k=0;k<n;k++) {
if(arr[k] == i && f==0) {
accm++;f=1-f;
}
if(arr[k] == j && f==1) {
f=1-f; accm++;
}
}
ans = max(ans,accm);
}
}
}
cout<<ans<<'\n';
return 0;
}
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