90pts求调

#include<iostream>
using namespace std;

int m, t, a[10005], b[10005], f[10000005];

int main()
{
	cin >> t >> m;
	for(int i = 1; i <= m; i++) cin >> a[i] >> b[i];
		
	for(int i = 1; i <= m; i++)
		for(int j = a[i]; j <= t; j++)
			f[j] = max(f[j], f[j-a[i]] + b[i]);
		
	cout << f[t] << endl;
	
	return 0;
}