#include<iostream>
#include<cstdio>
#include<cmath>
#include<cstdlib>
#include<cstring>
#include<algorithm>
#include<map>
using namespace std;
int read()
{int x=0,f=1;char c=getchar();while (c<'0'||c>'9') {if (c=='-') f=-1;c=getchar();}while (c>='0'&&c<='9') x=(x<<1)+(x<<3)+(c^48),c=getchar();return x*f;
}
#define N 900
#define M 9000
#define inf 1000000000
int n,m,p[N],v[N],u[N],tot=0,t=-1;
bool flag[N];
int d[N],cur[N],q[N];
struct data{int to,nxt,cap,flow;
}edge[M<<1];
map<int,bool> f;
void addedge(int x,int y,int z)
{t++;edge[t].to=y,edge[t].nxt=p[x],edge[t].cap=z,edge[t].flow=0,p[x]=t;
}
bool bfs(int S,int T)
{memset(d,255,sizeof(d));d[S]=0;int head=0,tail=1;q[1]=S;do{int x=q[++head];for (int i=p[x];~i;i=edge[i].nxt)if (d[edge[i].to]==-1&&edge[i].flow<edge[i].cap){d[edge[i].to]=d[x]+1;q[++tail]=edge[i].to;}}while (head<tail);return ~d[T];
}
int work(int k,int T,int f)
{if (k==T) return f;int used=0;for (int i=cur[k];~i;i=edge[i].nxt)if (d[k]+1==d[edge[i].to]){int w=work(edge[i].to,T,min(f-used,edge[i].cap-edge[i].flow));edge[i].flow+=w,edge[i^1].flow-=w;if (edge[i].flow<edge[i].cap) cur[k]=i;used+=w;if (used==f) return f;}if (used==0) d[k]=-1;return used;
}
void dinic(int S,int T)
{for (int i=0;i<=t;i++) edge[i].flow=0;int ans=0;while (bfs(S,T)){memcpy(cur,p,sizeof(p));ans+=work(S,T,inf);}if (!f[ans]) f[ans]=1,tot++;
}
void dfs(int k)
{flag[k]=1;for (int i=p[k];~i;i=edge[i].nxt)if (!flag[edge[i].to]&&edge[i].flow<edge[i].cap)dfs(edge[i].to);
}
void solve(int l,int r)
{if (l>=r) return;dinic(v[l],v[r]);memset(flag,0,sizeof(flag));dfs(v[l]);int cnt=l-1;for (int i=l;i<=r;i++)if (flag[v[i]]) u[++cnt]=v[i];cnt=r+1;for (int i=l;i<=r;i++)if (!flag[v[i]]) u[--cnt]=v[i];for (int i=l;i<=r;i++) v[i]=u[i];solve(l,cnt-1);solve(cnt,r);
}
int main()
{
#ifndef ONLINE_JUDGEfreopen("bzoj4519.in","r",stdin);freopen("bzoj4519.out","w",stdout);const char LL[]="%I64d\n";
#elseconst char LL[]="%lld\n";
#endifn=read(),m=read();memset(p,255,sizeof(p));for (int i=1;i<=m;i++){int x=read(),y=read(),z=read();addedge(x,y,z),addedge(y,x,z);}for (int i=1;i<=n;i++) v[i]=i;solve(1,n);cout<<tot;return 0;
}