[골5] 1106 - 호텔

#include <iostream>
#include <algorithm>
#include <vector>

using namespace std;

#pragma region 입출력 속도향상

#define FAST_IO() \
{\
	ios::sync_with_stdio(false);\
	cin.tie(NULL); \
	cout.tie(NULL); \
}\

#pragma endregion

#define MAX 100000

int main()
{
	FAST_IO();

	int c, n;
	cin >> c >> n;
	vector<pair<int, int>> v;

	for (int i = 0; i < n; i++)
	{
		int a, b;
		cin >> a >> b;
		v.push_back({ a,b });
	}
	int dp[MAX + 1] = { 0 };

	for (int i = 0; i < v.size(); i++)
	{
		for (int j = 1; j <= MAX; j++)
		{
			int val = j - v[i].first;

			if (val >= 0)
				dp[j] = max(dp[j], dp[val] + v[i].second);
		}
	}
	for (int i = 1; i <= MAX; i++)
	{
		if (dp[i] >= c)
		{
			cout << i;
			break;
		}
	}
	return 0;
}