#include <bits/stdc++.h>
#define FOR(i, x, y) for (int i = x; i < y; i++)
typedef long long ll;
using namespace std;
pair<ll, int> a[1001];
ll ans[1001], sm = 0;
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
int n;
cin >> n;
FOR(i, 0, n) {
ll v;
cin >> v >> a[i].first;
sm += v;
a[i].second = i;
}
sort(a, a + n, greater<pair<ll, int>>());
int i = 0;
for (; sm; i++) {
ans[a[i].second] = min(a[i].first, sm);
sm -= min(a[i].first, sm);
}
cout << n - i << '\n';
FOR(i, 0, n) cout << ans[i] << ' ';
return 0;
}