#include <bits/stdc++.h>
#define fast cin.tie(0)->sync_with_stdio(0);
#define int long long
#define inf ((int)1e18)
#define N 1005
using namespace std;
vector <pair<int, int> > glass(N);
vector <int> ans(N);
int32_t main(){
fast
int n;
cin>>n;
int all = 0;
for(int i = 0; i < n; i++) {
int amount;
glass[i].second = i;
cin>>amount>>glass[i].first;
all += amount;
}
sort(glass.begin(), glass.end());
reverse(glass.begin(), glass.end());
int fans;
for(int i = 0; i < n; i++) {
if(all <= 0) {fans = 0; break; };
ans[glass[i].second] = min(glass[i].first, all);
all -= glass[i].first;
if(all <= 0) {
fans = n - i - 1;
break;
}
}
cout<<fans<<"\n";
for(int i = 0; i < n; i++) {
cout<<ans[i]<<" ";
}
}
