NOIPT1调不出来

#include <bits/stdc++.h>
#define int long long
using namespace std;
const int N = 1e6 + 10;

struct node{
	int x;
	int y;
	int sum;
}a[N];


bool cmp(node a,node b){
	if(a.sum != b.sum) return a.sum < b.sum;
	return a.x < b.x;
}

bool cmp2(node a,node b){
	return a.x < b.x;
}


signed main()
{
	ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
	int n,m;cin >> n >> m;
	for(int i = 1;i <= n;i ++){
		cin >> a[i].x >> a[i].y;
		a[i].sum = (a[i].x + a[i].y);
	}
	
	sort(a + 1,a + n + 1,cmp);
	
	int t = m,cnt = 0;
	
	cnt += 2 * (t / a[1].sum);
	t %= a[1].sum;
	
	sort(a + 1,a + n + 1,cmp2);
	
//	for(int i = 1;i <= n;i ++)
//		cout << a[i].x << " " << a[i].y << "\n";
	
	
	for(int i = 1;i <= n;i ++){
		if(t >= a[i].x){
			t -= a[i].x;
			cnt ++;
		} 
		else break;
	}
	
	cout << cnt;
	
	return 0;
}