// #pragma GCC target ("avx,avx2,fma")
// #pragma GCC optimize ("Ofast,inline") // O1 - O2 - O3 - Os - Ofast
// #pragma GCC optimize ("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
#define rep(i, a, b) for (int i = (a); i < (b); ++i)
#define per(i, a, b) for (int i = (b) - 1; i >= (a); --i)
#define trav(a, x) for (auto &a : x)
#define all(x) x.begin(), x.end()
#define sz(x) (int)x.size()
#define pb push_back
#define debug(x) cout<<#x<<" = "<<x<<endl
#define umap unordered_map
#define uset unordered_set
typedef pair<int, int> ii;
typedef pair<int, ii> iii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<vi> vvi;
typedef long long ll;
typedef pair<ll,ll> pll;
typedef vector<ll> vll;
typedef vector<pll> vpll;
const int INF = 1'000'000'007;
int main() {
cin.tie(0)->sync_with_stdio(0);
cin.exceptions(cin.failbit);
int n,k;
cin>>n>>k;
vector<iii> products(n);
rep(i,0,n) {
cin>>products[i].first>>products[i].second.first;
products[i].second.second=i;
}
sort(all(products));
int cnt=0;
ll sum=0;
vector<bool> taken(n,0);
vector<iii> optimal;
{
int id=0;
trav(product,products) {
int cost=product.first,deadline,bla;
tie(deadline,bla)=product.second;
per(i,0,deadline) if(taken[i]==0) {
taken[i]=1;
++cnt;
sum+=cost;
optimal.pb({deadline,{cost,id}});
break;
}
++id;
}
}
per(i,0,sz(optimal)) {
int id=optimal[i].second.second;
products.erase(products.begin()+id);
}
sort(all(optimal));
rep(i,0,n) swap(products[i].first,products[i].second.first);
sort(all(optimal));
rep(i,0,n) swap(products[i].first,products[i].second.first);
cnt=0;
int unique_id=1;
//cout<<sz(products)<<endl;
//trav(product,products) debug(product.first);
map<pair<int,pair<ll,int>>,ii> nodes;
nodes[{-sz(optimal),{sum,0}}]={0,0};
while(cnt<k) {
auto it=nodes.begin();
int siz=-it->first.first;
ll sum_cost=it->first.second.first;
int product_index,pos_edit;
tie(product_index,pos_edit)=it->second;
nodes.erase(it);
if(pos_edit%2==0) {
//cout<<endl;
//cout<<"siz = "<<siz<<" sum_cost = "<<sum_cost<<" product_index = "<<product_index<<" pos_edit = "<<pos_edit<<endl;
cout<<siz<<' '<<sum_cost<<endl;
++cnt;
if(cnt==k) break;
}
int bla=pos_edit;
pos_edit/=2;
int pos_cost=0;
if(pos_edit!=sz(optimal)) pos_cost=optimal[pos_edit].second.first;
int product_cost=0;
if(pos_edit!=sz(optimal)) product_cost=products[product_index].first;;
//cout<<"siz = "<<siz<<" sum_cost = "<<sum_cost<<" product_index = "<<product_index<<" pos_edit = "<<bla<<" pos_cost = "<<pos_cost<<" product_cost = "<<product_cost<<endl;
if(pos_edit!=sz(optimal)) {
nodes[{-siz,{sum_cost,unique_id++}}]={product_index,(pos_edit+1)*2+1};
nodes[{-(siz-1),{sum_cost-pos_cost,unique_id++}}]={product_index,(pos_edit+1)*2};
}
if(product_index!=sz(products)) nodes[{-siz,{sum_cost,unique_id++}}]={product_index+1,(pos_edit)*2+1}; // move product index
int removed=sz(optimal)-siz;
if(pos_edit!=sz(optimal)&&product_index!=sz(products)&&pos_edit-removed<products[product_index].second.first) nodes[{-siz,{sum_cost-pos_cost+product_cost,unique_id++}}]={product_index+1,(pos_edit+1)*2};
}
return 0;
}
