C :

#include <stdio.h>
int totalTime, medics;
int value[100];
int time[100];
int max[1001];
int main() 
{
    scanf("%d%d", &totalTime, &medics);
    int i, t;
    for (i=0; i<medics; i++)
    {
        scanf("%d%d", &time[i], &value[i]);
    }

    for (i=0; i<medics; i++)
    {
        for (t=totalTime; t>0; t--)
        {
            if (time[i] <= t)
            {
                if (value[i] + max[t-time[i]] > max[t])//第i个的价值+不选第i个且用时为t-time[i-1]时最大价值
                {
                    max[t] = value[i] + max[t-time[i]];
                }
            }
        }
    }
    printf("%d\n", max[totalTime]);
    return 0;
}

C++ :

#include<iostream>
#include<algorithm>
using namespace std;
int V[101][1001],w[101],v[101];
int cnt,tim;
int solve(int n)
{
    for(int i=0;i<=n;i++)
        V[i][0]=0;
    for(int i=0;i<=n;i++)
        V[0][i]=0;
    for(int i=1;i<=n;i++)
        for(int j=1;j<=tim;j++)
        if(j<w[i])
            V[i][j]=V[i-1][j];
        else
            V[i][j]=max(V[i-1][j],V[i-1][j-w[i]]+v[i]);
    return V[n][tim];
}
int main()
{
    while(cin>>tim>>cnt)
    {
        for(int i=1;i<=cnt;i++)
            cin>>w[i]>>v[i];
        int ans=solve(cnt);
        cout<<ans<<endl;
    }
    return 0;
}