60分WA求助，实在找不到错

#include<stdio.h>
#include<string.h>
int n,m,v[65][65],w[65][65],f[32005];
int main()
{
    memset(f,0,sizeof(f));
    memset(v,0,sizeof(v));
    memset(w,0,sizeof(w));
    scanf("%d%d",&n,&m);
    int i,j,z,a,b,c,sum=0;
    for(i=1;i<=m;i++)
    {
        scanf("%d%d%d",&a,&b,&c);
        if(c==0)
        {
            sum++;
            w[sum][1]=b*a;v[sum][1]=a;
        }
        else
        {
            j=2;
            for(;j<=65;j++)
            {
                if(w[c][j]==0) break;
            }
            w[c][j]=b*a;v[c][j]=a;
        }
    }
    for(z=1;z<=sum;z++)
    {
        for(i=n;i>=v[z][1];i--)
        {
            if(f[i-v[z][1]]+w[z][1]>f[i]) f[i]=f[i-v[z][1]]+w[z][1];
            if(i>=v[z][1]+v[z][2]&&f[i-v[z][1]-v[z][2]]+w[z][1]+w[z][2]>f[i]) f[i]=f[i-v[z][1]-v[z][2]]+w[z][1]+w[z][2];
            if(i>=v[z][1]+v[z][3]&&f[i-v[z][1]-v[z][3]]+w[z][1]+w[z][3]>f[i]) f[i]=f[i-v[z][1]-v[z][3]]+w[z][1]+w[z][3];
            if(i>=v[z][1]+v[z][2]+v[z][3]&&f[i-v[z][1]-v[z][2]-v[z][3]]+w[z][1]+w[z][2]+w[z][3]>f[i]) f[i]=f[i-v[z][1]-v[z][2]-v[z][3]]+w[z][1]+w[z][2]+w[z][3];
        }       
    }
    printf("%d",f[n]);
    return 0;
}