洛谷P1048 采药

#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <algorithm>
using namespace std;

int max(int a, int b){
    return a > b ? a : b;
}

int main()
{
    int m, n;
    cin >> m >> n;
    int cost[101] = { 0 };
    int value[101] = { 0 };
    for (int i = 0; i < n; i++){
        cin >> cost[i] >> value[i];
    }
    int pos[1001] = { 0 };
    for (int i = 0; i < n; i++){
        for (int j = m; j >= cost[i]; j--){
            pos[j] = max(pos[j], pos[j - cost[i]] + value[i]);
        }
    }
    cout << pos[m] << endl;



    return 0;
}