이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int, int>
#define ff first
#define ss second
#define pb push_back
map<pii, int> dp[2];
int cnt[1001000];
int a[1001000];
vector<int> d[1000100];
void solve(){
int n, m;
cin>>n>>m;
for(int i=1; i<=n; i++){
cin>>a[i];
cnt[a[i]] ++;
}
vector<pii> g;
for(int i=1; i<=m; i++){
g.pb({cnt[i], i});
}
sort(g.begin(), g.end());
int h[2]={0, 0};
for(int i=1; i+1<=n; i+=2){
int l=a[i], r=a[i + 1];
dp[1][{l, r}] ++;
dp[1][{r, l}] ++;
h[1] ++;
d[l].pb(r);
d[r].pb(l);
}
for(int i=2; i+1<=n; i+=2){
int l=a[i], r=a[i + 1];
dp[0][{l, r}] ++;
dp[0][{r, l}] ++;
h[0] ++;
d[l].pb(r);
d[r].pb(l);
}
ll dd = 0;
for(int i=1; i<=m; i++) dd += d[i].size();
if(dd > 2e6) return;
if(g.size() == 0 or g.size() > 1e6) return;
for(int i=1; i<=m; i++){
int ans = n - cnt[i];
int ls = g.size() - 1;
map<int, int> us;
us[i] = 1;
for(int j: d[i]){
if(j == i) continue;
for(int k=0; k<2; k++){
ans = min(ans, n-cnt[i]-cnt[j]+dp[k][{i, j}]);
}
us[j] = 1;
}
while(ls >= 0 and us.count(g[ls].ss)) ls--;
if(ls >= 0) ans = min(ans, n - cnt[i] - g[ls].ff);
cout<<ans<<'\n';
}
}
signed main(){
ios_base::sync_with_stdio(NULL), cin.tie(NULL), cout.tie(NULL);
solve();
}
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