#include <cstdio>
#include <stdio.h>
#include <stdbool.h>
#include <iostream>
#include <map>
#include <vector>
#include <climits>
#include <stack>
#include <string>
#include <queue>
#include <algorithm>
#include <set>
#include <unordered_set>
#include <unordered_map>
#include <cmath>
#include <cctype>
#include <bitset>
#include <iomanip>
#include <cstring>
#include <numeric>
#include <cassert>
#include <random>
#include <chrono>
#include <fstream>
using namespace std;
#define int long long
#define pii pair<int, int>
#define mp make_pair
#define pb push_back
#define fi first
#define se second
struct trio{
int a, b, i;
};
bool custom(trio a, trio b){
return a.b>b.b;
}
int32_t main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int n, sum=0, res;
cin>>n, res=n;
vector<trio> vect(n);
vector<int> ans(n, 0);
for (int i=0; i<n; ++i)cin>>vect[i].a>>vect[i].b, vect[i].i=i, sum+=vect[i].a;
sort(vect.begin(), vect.end(), custom);
for (int i=0; i<n; ++i){
if (!sum)break;
--res;
ans[vect[i].i]=min(sum, vect[i].b);
sum-=min(sum, vect[i].b);
}
cout<<res<<"\n";
for (auto a:ans)cout<<a<<" ";
}
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