#include <bits/stdc++.h>
using namespace std;
#define int long long
int const N=2e5+5;
int const mod=1e9+7;
signed main(){
int n;
cin>>n;
vector<pair<int,int>> gla;
int li=0;
for (int i = 0; i < n; ++i)
{
int a;
cin>>a;
li+=a;
cin>>a;
gla.push_back({a,i});
}
sort(gla.begin(), gla.end());
reverse(gla.begin(), gla.end());
int ans[n]={0};
int c=0;
for(auto [v,i]:gla){
ans[i]=min(v,li);
if(ans[i]==0)
c++;
li-=min(v,li);
}
cout<<c<<endl;
for (int i = 0; i < n; ++i)
cout<<ans[i]<<' ';
cout<<endl;
return 0;
}
