View Code of Problem 4048

#include<iostream>
#include<algorithm>
using namespace std;
struct Per{
	int a;
	int b;
};
Per p[100010];
bool comp(Per lhs,Per rhs){
	return lhs.a<rhs.a;
}
int main(){
	int n,m;
	while(cin>>n>>m){
		for(int i=0;i<m;i++){
			cin>>p[i].a>>p[i].b;
		}
		sort(p,p+m,comp);
		for(int i=0;i<m;i++){
			if(n>=p[i].a){
				n+=p[i].b;
			}
		}
		cout<<n<<endl;
	}
}

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