#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define int ll
typedef pair<int,int> pii;
const int MAXSIZE=10000020;
const ll INF=0x3f3f3f3f3f3f3f3fLL;
int bufpos;
char buf[MAXSIZE];
#define NEG 0
void init(){
	#ifdef LOCAL
		freopen("F.txt","r",stdin);
		freopen("F.out","w",stdout);
	#endif
	buf[fread(buf,1,MAXSIZE,stdin)]='\0';
	bufpos=0;
}
#if NEG
int readint(){
	bool isneg;
	int val=0;
	for(;!isdigit(buf[bufpos]) && buf[bufpos]!='-';bufpos++);
	bufpos+=(isneg=buf[bufpos]=='-');
	for(;isdigit(buf[bufpos]);bufpos++)
		val=val*10+buf[bufpos]-'0';
	return isneg?-val:val;
}
#else
int readint(){
	int val=0;
	for(;!isdigit(buf[bufpos]);bufpos++);
	for(;isdigit(buf[bufpos]);bufpos++)
		val=val*10+buf[bufpos]-'0';
	return val;
}
#endif
char readchar(){
	for(;isspace(buf[bufpos]);bufpos++);
	return buf[bufpos++];
}
int readstr(char* s){
	int cur=0;
	for(;isspace(buf[bufpos]);bufpos++);
	for(;!isspace(buf[bufpos]);bufpos++)
		s[cur++]=buf[bufpos];
	s[cur]='\0';
	return cur;
}
const int maxn=200002;
vector<int> v[maxn];
int id[maxn];
set<pii> s,s2,s3,d,d2;
signed main(){
	init();
	int n=readint(),k=readint();
	for(int i=1;i<=n;i++){
		int c=readint();
		v[c].push_back(readint());
	}
	for(int i=1;i<=k;i++){
		sort(v[i].begin(),v[i].end(),greater<ll>());
		s2.insert(make_pair(v[i][0]+v[i][1],i));
		if (v[i].size()>2)
			s3.insert(make_pair(v[i][0]+v[i][1]+v[i][2],i));
	}
	puts("-1");
	if (n==1)
		return 0;
	pii qwq=*s2.rbegin();
	s2.erase(qwq);
	if (v[qwq.second].size()>2)
		s3.erase(make_pair(qwq.first+v[qwq.second][2],qwq.second));
	d2.insert(qwq);
	ll now=qwq.first;
	id[qwq.second]=2;
	if (v[qwq.second].size()!=2)
		s.insert(make_pair(v[qwq.second][2],qwq.second));
	bool flag=false;
	printf("%lld\n",now);
	for(int i=3;i<=n;i++){
		if (flag){
			ll x=s2.rbegin()->first;
			now+=x;
			pii qwq=*s2.rbegin();
			s2.erase(qwq);
			if (v[qwq.second].size()>2)
				s3.erase(make_pair(qwq.first+v[qwq.second][2],qwq.second));
			d2.insert(qwq);
			id[qwq.second]=2;
			if (v[qwq.second].size()!=2)
				s.insert(make_pair(v[qwq.second][2],qwq.second));
			printf("%lld\n",now);
			flag=false;
			continue;
		}
		ll x=s.empty()?-INF:s.rbegin()->first,y=(s2.empty() || d.empty())?-INF:(s2.rbegin()->first-d.begin()->first);
		// printf("%d %d\n",s2.rbegin()->first,d.begin()->first);
		ll z=(d2.empty() || s3.empty())?-INF:(s3.rbegin()->first-d2.begin()->first);
		ll mx=max(x,max(y,z));
		if (mx==-INF){
			flag=true;
			puts("-1");
			continue;
		}
		if (mx==x){
			// if (i<=4)
			// fprintf(stderr,"on x\n");
			now+=x;
			printf("%lld\n",now);
			if (s2.size() && x*2<s2.rbegin()->first){
				flag=true;
				now-=x;
			}else{
				pii qwq=*s.rbegin();
				s.erase(qwq);
				if (id[qwq.second]>2)
					d.erase(make_pair(v[qwq.second][id[qwq.second]-1],qwq.second));
				else d2.erase(make_pair(v[qwq.second][0]+v[qwq.second][1],qwq.second));
				d.insert(qwq);
				id[qwq.second]++;
				if (id[qwq.second]!=v[qwq.second].size())
					s.insert(make_pair(v[qwq.second][id[qwq.second]],qwq.second));
			}
		}else if (mx==y){
			// if (i<=4)
			// fprintf(stderr,"on y\n");
			now+=y;
			printf("%lld\n",now);
			now-=y;
			flag=true;
		}else{
			// if (i<=4)
			// fprintf(stderr,"on z\n");
			now+=z;
			printf("%lld\n",now);
			now-=z;
			flag=true;
		}
	}
}


Measured memory_bytes: 23936