A. Dragons 1000 / 贪心

Posted 2021-10-02 幽殇默

https://codeforces.com/problemset/problem/230/A

#include<bits/stdc++.h>
using namespace std;
bool flag=true;
vector<pair<int,int>>ve;
int main(void)
{
	int s,t;
	cin>>s>>t;
	for(int i=0;i<t;i++)
	{
		int a,b; cin>>a>>b; 
		ve.push_back({a,b});
	}
	sort(ve.begin(),ve.end());
	for(int i=0;i<t;i++)
	{
		if(s>ve[i].first) s+=ve[i].second;
		else flag=false;
	}
	if(flag) puts("YES");
	else puts("NO");
	return 0;
}